vision

type ErrorHandler ¶

type ErrorHandler = func()

ErrorHandler handles The block to invoke after the request finishes processing.

Used by:

• [VNCalculateImageAestheticsScoresRequest.InitWithCompletionHandler]
• [VNClassifyImageRequest.InitWithCompletionHandler]
• [VNCoreMLRequest.InitWithCompletionHandler]
• VNCoreMLRequest.InitWithModelCompletionHandler
• [VNDetectAnimalBodyPoseRequest.InitWithCompletionHandler]
• [VNDetectBarcodesRequest.InitWithCompletionHandler]
• [VNDetectContoursRequest.InitWithCompletionHandler]
• [VNDetectDocumentSegmentationRequest.InitWithCompletionHandler]
• [VNDetectFaceCaptureQualityRequest.InitWithCompletionHandler]
• [VNDetectFaceLandmarksRequest.InitWithCompletionHandler]
• [VNDetectFaceRectanglesRequest.InitWithCompletionHandler]
• [VNDetectHorizonRequest.InitWithCompletionHandler]
• [VNDetectHumanBodyPose3DRequest.InitWithCompletionHandler]
• [VNDetectHumanBodyPose3DRequest.InitWithFrameAnalysisSpacingCompletionHandler]
• [VNDetectHumanBodyPoseRequest.InitWithCompletionHandler]
• [VNDetectHumanHandPoseRequest.InitWithCompletionHandler]
• [VNDetectHumanRectanglesRequest.InitWithCompletionHandler]
• [VNDetectRectanglesRequest.InitWithCompletionHandler]
• [VNDetectTextRectanglesRequest.InitWithCompletionHandler]
• [VNDetectTrajectoriesRequest.InitWithCompletionHandler]
• [VNDetectTrajectoriesRequest.InitWithFrameAnalysisSpacingCompletionHandler]
• VNDetectTrajectoriesRequest.InitWithFrameAnalysisSpacingTrajectoryLengthCompletionHandler
• [VNGenerateAttentionBasedSaliencyImageRequest.InitWithCompletionHandler]
• [VNGenerateForegroundInstanceMaskRequest.InitWithCompletionHandler]
• [VNGenerateImageFeaturePrintRequest.InitWithCompletionHandler]
• [VNGenerateObjectnessBasedSaliencyImageRequest.InitWithCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCGImageOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCGImageOrientationOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCIImageOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCIImageOrientationOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCMSampleBufferOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCMSampleBufferOrientationOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCVPixelBufferOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedCVPixelBufferOrientationOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedImageDataOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedImageDataOrientationOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedImageURLOptionsCompletionHandler]
• [VNGenerateOpticalFlowRequest.InitWithTargetedImageURLOrientationOptionsCompletionHandler]
• [VNGeneratePersonInstanceMaskRequest.InitWithCompletionHandler]
• [VNGeneratePersonSegmentationRequest.InitWithCompletionHandler]
• [VNGeneratePersonSegmentationRequest.InitWithFrameAnalysisSpacingCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCGImageOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCGImageOrientationOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCIImageOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCIImageOrientationOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCMSampleBufferOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCMSampleBufferOrientationOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCVPixelBufferOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedCVPixelBufferOrientationOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedImageDataOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedImageDataOrientationOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedImageURLOptionsCompletionHandler]
• [VNHomographicImageRegistrationRequest.InitWithTargetedImageURLOrientationOptionsCompletionHandler]
• [VNImageBasedRequest.InitWithCompletionHandler]
• [VNImageRegistrationRequest.InitWithCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCGImageOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCGImageOrientationOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCIImageOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCIImageOrientationOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCMSampleBufferOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCMSampleBufferOrientationOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCVPixelBufferOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedCVPixelBufferOrientationOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedImageDataOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedImageDataOrientationOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedImageURLOptionsCompletionHandler]
• [VNImageRegistrationRequest.InitWithTargetedImageURLOrientationOptionsCompletionHandler]
• VNInstanceMaskObservation.GenerateMaskedImageOfInstancesFromRequestHandlerCroppedToInstancesExtentError
• VNInstanceMaskObservation.GenerateScaledMaskForImageForInstancesFromRequestHandlerError
• [VNRecognizeAnimalsRequest.InitWithCompletionHandler]
• [VNRecognizeTextRequest.InitWithCompletionHandler]
• VNRequest.InitWithCompletionHandler
• [VNStatefulRequest.InitWithCompletionHandler]
• VNStatefulRequest.InitWithFrameAnalysisSpacingCompletionHandler
• [VNTargetedImageRequest.InitWithCompletionHandler]
• VNTargetedImageRequest.InitWithTargetedCGImageOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCGImageOrientationOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCIImageOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCIImageOrientationOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCMSampleBufferOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCMSampleBufferOrientationOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCVPixelBufferOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedCVPixelBufferOrientationOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedImageDataOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedImageDataOrientationOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedImageURLOptionsCompletionHandler
• VNTargetedImageRequest.InitWithTargetedImageURLOrientationOptionsCompletionHandler
• [VNTrackHomographicImageRegistrationRequest.InitWithCompletionHandler]
• [VNTrackHomographicImageRegistrationRequest.InitWithFrameAnalysisSpacingCompletionHandler]
• [VNTrackObjectRequest.InitWithCompletionHandler]
• VNTrackObjectRequest.InitWithDetectedObjectObservationCompletionHandler
• [VNTrackOpticalFlowRequest.InitWithCompletionHandler]
• [VNTrackOpticalFlowRequest.InitWithFrameAnalysisSpacingCompletionHandler]
• [VNTrackRectangleRequest.InitWithCompletionHandler]
• VNTrackRectangleRequest.InitWithRectangleObservationCompletionHandler
• [VNTrackTranslationalImageRegistrationRequest.InitWithCompletionHandler]
• [VNTrackTranslationalImageRegistrationRequest.InitWithFrameAnalysisSpacingCompletionHandler]
• [VNTrackingRequest.InitWithCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCGImageOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCGImageOrientationOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCIImageOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCIImageOrientationOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCMSampleBufferOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCMSampleBufferOrientationOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCVPixelBufferOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedCVPixelBufferOrientationOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedImageDataOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedImageDataOrientationOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedImageURLOptionsCompletionHandler]
• [VNTranslationalImageRegistrationRequest.InitWithTargetedImageURLOrientationOptionsCompletionHandler]

type IVNAnimalBodyPoseObservation ¶

type IVNAnimalBodyPoseObservation interface {
	IVNRecognizedPointsObservation

	// The names of the available joints in the observation.
	AvailableJointNames() []string
	// The available joint group names in the observation.
	AvailableJointGroupNames() []string
	// Returns the point for a joint name the observation recognizes.
	RecognizedPointForJointNameError(jointName VNAnimalBodyPoseObservationJointName) (IVNRecognizedPoint, error)
	// Returns the points for a joint group name the observation recognizes.
	RecognizedPointsForJointsGroupNameError(jointsGroupName VNAnimalBodyPoseObservationJointsGroupName) (foundation.INSDictionary, error)

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNAnimalBodyPoseObservation class.

Accessing Points ¶

• [IVNAnimalBodyPoseObservation.AvailableJointNames]: The names of the available joints in the observation.
• [IVNAnimalBodyPoseObservation.AvailableJointGroupNames]: The available joint group names in the observation.
• [IVNAnimalBodyPoseObservation.RecognizedPointForJointNameError]: Returns the point for a joint name the observation recognizes.
• [IVNAnimalBodyPoseObservation.RecognizedPointsForJointsGroupNameError]: Returns the points for a joint group name the observation recognizes.

See: https://developer.apple.com/documentation/Vision/VNAnimalBodyPoseObservation

type IVNBarcodeObservation ¶

type IVNBarcodeObservation interface {
	IVNRectangleObservation

	// A string value that represents the barcode payload.
	PayloadStringValue() string
	// The raw data representation of the barcode’s payload.
	PayloadData() foundation.INSData
	// The supplemental code decoded as a string value.
	SupplementalPayloadString() string
	SupplementalPayloadData() foundation.INSData
	// The supplemental composite type.
	SupplementalCompositeType() VNBarcodeCompositeType
	// A Boolean value that indicates whether the barcode carries any global standards data.
	IsGS1DataCarrier() bool

	// An object that describes the low-level details about the barcode and its data.
	BarcodeDescriptor() objectivec.IObject

	// The symbology of the observed barcode.
	Symbology() VNBarcodeSymbology

	// A Boolean value that indicates whether the barcode is color inverted.
	IsColorInverted() bool

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNBarcodeObservation class.

Parsing the Payload ¶

• [IVNBarcodeObservation.PayloadStringValue]: A string value that represents the barcode payload.
• [IVNBarcodeObservation.PayloadData]: The raw data representation of the barcode’s payload.
• [IVNBarcodeObservation.SupplementalPayloadString]: The supplemental code decoded as a string value.
• [IVNBarcodeObservation.SupplementalPayloadData]
• [IVNBarcodeObservation.SupplementalCompositeType]: The supplemental composite type.
• [IVNBarcodeObservation.IsGS1DataCarrier]: A Boolean value that indicates whether the barcode carries any global standards data.

Reading Barcode Descriptors ¶

• [IVNBarcodeObservation.BarcodeDescriptor]: An object that describes the low-level details about the barcode and its data.

Identifying Barcode Types ¶

• [IVNBarcodeObservation.Symbology]: The symbology of the observed barcode.

Identifying Barcode Colors ¶

• [IVNBarcodeObservation.IsColorInverted]: A Boolean value that indicates whether the barcode is color inverted.

See: https://developer.apple.com/documentation/Vision/VNBarcodeObservation

type IVNCalculateImageAestheticsScoresRequest ¶

type IVNCalculateImageAestheticsScoresRequest interface {
	IVNImageBasedRequest
}

An interface definition for the VNCalculateImageAestheticsScoresRequest class.

See: https://developer.apple.com/documentation/Vision/VNCalculateImageAestheticsScoresRequest

type IVNCircle ¶

type IVNCircle interface {
	objectivec.IObject

	// Creates a circle with the specified center and radius.
	InitWithCenterRadius(center IVNPoint, radius float64) VNCircle
	// Creates a circle with the specified center and diameter.
	InitWithCenterDiameter(center IVNPoint, diameter float64) VNCircle

	// The circle’s center point.
	Center() IVNPoint
	// The circle’s diameter.
	Diameter() float64
	// The circle’s radius.
	Radius() float64
	// Determines if this circle, including its boundary, contains the specified point.
	ContainsPoint(point IVNPoint) bool
	// Determines if a ring around this circle’s circumference contains the specified point.
	ContainsPointInCircumferentialRingOfWidth(point IVNPoint, ringWidth float64) bool

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNCircle class.

Creating a Circle ¶

• [IVNCircle.InitWithCenterRadius]: Creates a circle with the specified center and radius.
• [IVNCircle.InitWithCenterDiameter]: Creates a circle with the specified center and diameter.

Inspecting a Circle ¶

• [IVNCircle.Center]: The circle’s center point.
• [IVNCircle.Diameter]: The circle’s diameter.
• [IVNCircle.Radius]: The circle’s radius.
• [IVNCircle.ContainsPoint]: Determines if this circle, including its boundary, contains the specified point.
• [IVNCircle.ContainsPointInCircumferentialRingOfWidth]: Determines if a ring around this circle’s circumference contains the specified point.

See: https://developer.apple.com/documentation/Vision/VNCircle

type IVNClassificationObservation ¶

type IVNClassificationObservation interface {
	IVNObservation

	// Classification label identifying the type of observation.
	Identifier() string

	// A Boolean variable indicating whether the observation contains precision and recall curves.
	HasPrecisionRecallCurve() bool
	// Determines whether the observation for a specific recall has a minimum precision value.
	HasMinimumPrecisionForRecall(minimumPrecision float32, recall float32) bool
	// Determines whether the observation for a specific precision has a minimum recall value.
	HasMinimumRecallForPrecision(minimumRecall float32, precision float32) bool

	// Model information you use at runtime during development, which Xcode also displays in its Core ML model editor view.
	ModelDescription() coreml.MLModelDescription
	SetModelDescription(value coreml.MLModelDescription)
	// The name of the primary prediction feature output description.
	PredictedFeatureName() string
	SetPredictedFeatureName(value string)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNClassificationObservation class.

Determining Classification ¶

• [IVNClassificationObservation.Identifier]: Classification label identifying the type of observation.

Measuring Confidence and Precision ¶

• [IVNClassificationObservation.HasPrecisionRecallCurve]: A Boolean variable indicating whether the observation contains precision and recall curves.
• [IVNClassificationObservation.HasMinimumPrecisionForRecall]: Determines whether the observation for a specific recall has a minimum precision value.
• [IVNClassificationObservation.HasMinimumRecallForPrecision]: Determines whether the observation for a specific precision has a minimum recall value.

See: https://developer.apple.com/documentation/Vision/VNClassificationObservation

type IVNClassifyImageRequest ¶

type IVNClassifyImageRequest interface {
	IVNImageBasedRequest

	// Returns the classification identifiers that the request supports in its current configuration.
	SupportedIdentifiersAndReturnError() ([]string, error)

	// A constant for specifying the first revision of the image-classification request.
	VNClassifyImageRequestRevision1() int
}

An interface definition for the VNClassifyImageRequest class.

Accessing Results ¶

• [IVNClassifyImageRequest.SupportedIdentifiersAndReturnError]: Returns the classification identifiers that the request supports in its current configuration.

Specifying Algorithm Revision ¶

• [IVNClassifyImageRequest.VNClassifyImageRequestRevision1]: A constant for specifying the first revision of the image-classification request.

See: https://developer.apple.com/documentation/Vision/VNClassifyImageRequest

type IVNContour ¶

type IVNContour interface {
	objectivec.IObject
	VNRequestRevisionProviding

	// The aspect ratio of the contour.
	AspectRatio() float32
	// The contour object’s index path.
	IndexPath() objc.ID
	// The contour object as a path in normalized coordinates.
	NormalizedPath() coregraphics.CGPathRef
	// The contour’s number of points.
	PointCount() int
	// Simplifies the contour to a polygon using a Ramer-Douglas-Peucker algorithm.
	PolygonApproximationWithEpsilonError(epsilon float32) (IVNContour, error)

	// The total number of detected child contours.
	ChildContourCount() int
	// An array of contours that this contour encloses.
	ChildContours() []VNContour
	// Retrieves the child contour object at the specified index.
	ChildContourAtIndexError(childContourIndex uint) (IVNContour, error)

	// The contour’s array of points in normalized coordinates.
	NormalizedPoints() objectivec.IObject
	// The total number of detected contours.
	ContourCount() int
	SetContourCount(value int)
	// The total number of detected top-level contours.
	TopLevelContourCount() int
	SetTopLevelContourCount(value int)
	// An array of contours that don’t have another contour enclosing them.
	TopLevelContours() IVNContour
	SetTopLevelContours(value IVNContour)
}

An interface definition for the VNContour class.

Inspecting the Contour ¶

• [IVNContour.AspectRatio]: The aspect ratio of the contour.
• [IVNContour.IndexPath]: The contour object’s index path.
• [IVNContour.NormalizedPath]: The contour object as a path in normalized coordinates.
• [IVNContour.PointCount]: The contour’s number of points.
• [IVNContour.PolygonApproximationWithEpsilonError]: Simplifies the contour to a polygon using a Ramer-Douglas-Peucker algorithm.

Accessing Child Contours ¶

• [IVNContour.ChildContourCount]: The total number of detected child contours.
• [IVNContour.ChildContours]: An array of contours that this contour encloses.
• [IVNContour.ChildContourAtIndexError]: Retrieves the child contour object at the specified index.

See: https://developer.apple.com/documentation/Vision/VNContour

type IVNContoursObservation ¶

type IVNContoursObservation interface {
	IVNObservation

	// The total number of detected contours.
	ContourCount() int
	// The detected contours as a path object in normalized coordinates.
	NormalizedPath() coregraphics.CGPathRef
	// An array of contours that don’t have another contour enclosing them.
	TopLevelContours() []VNContour
	// The total number of detected top-level contours.
	TopLevelContourCount() int
	// Retrieves the contour object at the specified index, irrespective of hierarchy.
	ContourAtIndexError(contourIndex int) (IVNContour, error)
	// Retrieves the contour object at the specified index path.
	ContourAtIndexPathError(indexPath objectivec.IObject) (IVNContour, error)

	// The results of the request to detect contours.
	Results() IVNContoursObservation
	SetResults(value IVNContoursObservation)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNContoursObservation class.

Inspecting the Observation ¶

• [IVNContoursObservation.ContourCount]: The total number of detected contours.
• [IVNContoursObservation.NormalizedPath]: The detected contours as a path object in normalized coordinates.
• [IVNContoursObservation.TopLevelContours]: An array of contours that don’t have another contour enclosing them.
• [IVNContoursObservation.TopLevelContourCount]: The total number of detected top-level contours.
• [IVNContoursObservation.ContourAtIndexError]: Retrieves the contour object at the specified index, irrespective of hierarchy.
• [IVNContoursObservation.ContourAtIndexPathError]: Retrieves the contour object at the specified index path.

See: https://developer.apple.com/documentation/Vision/VNContoursObservation

type IVNCoreMLFeatureValueObservation ¶

type IVNCoreMLFeatureValueObservation interface {
	IVNObservation

	// The feature result of a [VNCoreMLRequest](<doc://Vision/documentation/Vision/VNCoreMLRequest>) that outputs neither a classification nor an image.
	FeatureValue() coreml.MLFeatureValue
	// The name used in the model description of the CoreML model that produced this observation.
	FeatureName() string

	// Model information you use at runtime during development, which Xcode also displays in its Core ML model editor view.
	ModelDescription() coreml.MLModelDescription
	SetModelDescription(value coreml.MLModelDescription)
	// A dictionary of output feature descriptions, which the model keys by the output’s name.
	OutputDescriptionsByName() coreml.MLFeatureDescription
	SetOutputDescriptionsByName(value coreml.MLFeatureDescription)
	// The name of the primary prediction feature output description.
	PredictedFeatureName() string
	SetPredictedFeatureName(value string)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNCoreMLFeatureValueObservation class.

Obtaining Feature Values ¶

• [IVNCoreMLFeatureValueObservation.FeatureValue]: The feature result of a VNCoreMLRequest(<doc://Vision/documentation/Vision/VNCoreMLRequest>) that outputs neither a classification nor an image.
• [IVNCoreMLFeatureValueObservation.FeatureName]: The name used in the model description of the CoreML model that produced this observation.

See: https://developer.apple.com/documentation/Vision/VNCoreMLFeatureValueObservation

type IVNCoreMLModel ¶

type IVNCoreMLModel interface {
	objectivec.IObject

	// An optional object to support inputs outside Vision.
	FeatureProvider() coreml.MLFeatureProvider
	SetFeatureProvider(value coreml.MLFeatureProvider)
	// The name of the feature value that Vision sets from the request handler.
	InputImageFeatureName() string
	SetInputImageFeatureName(value string)

	// The model to base the image analysis request on.
	Model() IVNCoreMLModel
	SetModel(value IVNCoreMLModel)
}

An interface definition for the VNCoreMLModel class.

Providing Features ¶

• [IVNCoreMLModel.FeatureProvider]: An optional object to support inputs outside Vision.
• [IVNCoreMLModel.SetFeatureProvider]
• [IVNCoreMLModel.InputImageFeatureName]: The name of the feature value that Vision sets from the request handler.
• [IVNCoreMLModel.SetInputImageFeatureName]

See: https://developer.apple.com/documentation/Vision/VNCoreMLModel

type IVNCoreMLRequest ¶

type IVNCoreMLRequest interface {
	IVNImageBasedRequest

	// Creates a model container to use with an image analysis request based on the model you provide.
	InitWithModel(model IVNCoreMLModel) VNCoreMLRequest
	// Creates a model container to use with an image analysis request based on the model you provide, with an optional completion handler.
	InitWithModelCompletionHandler(model IVNCoreMLModel, completionHandler ErrorHandler) VNCoreMLRequest
	// The model to base the image analysis request on.
	Model() IVNCoreMLModel

	// An optional setting that tells the Vision algorithm how to scale an input image.
	ImageCropAndScaleOption() VNImageCropAndScaleOption
	SetImageCropAndScaleOption(value VNImageCropAndScaleOption)

	// A constant for specifying revision 1 of a Core ML request.
	VNCoreMLRequestRevision1() int

	// The level of confidence in the observation’s accuracy.
	Confidence() VNConfidence
	SetConfidence(value VNConfidence)
	// Model information you use at runtime during development, which Xcode also displays in its Core ML model editor view.
	ModelDescription() coreml.MLModelDescription
	SetModelDescription(value coreml.MLModelDescription)
	// The name of the primary prediction feature output description.
	PredictedFeatureName() string
	SetPredictedFeatureName(value string)
}

An interface definition for the VNCoreMLRequest class.

Initializing with a Core ML Model ¶

• [IVNCoreMLRequest.InitWithModel]: Creates a model container to use with an image analysis request based on the model you provide.
• [IVNCoreMLRequest.InitWithModelCompletionHandler]: Creates a model container to use with an image analysis request based on the model you provide, with an optional completion handler.
• [IVNCoreMLRequest.Model]: The model to base the image analysis request on.

Configuring Image Options ¶

• [IVNCoreMLRequest.ImageCropAndScaleOption]: An optional setting that tells the Vision algorithm how to scale an input image.
• [IVNCoreMLRequest.SetImageCropAndScaleOption]

Identifying Request Revisions ¶

• [IVNCoreMLRequest.VNCoreMLRequestRevision1]: A constant for specifying revision 1 of a Core ML request.

See: https://developer.apple.com/documentation/Vision/VNCoreMLRequest

type IVNDetectAnimalBodyPoseRequest ¶

type IVNDetectAnimalBodyPoseRequest interface {
	IVNImageBasedRequest

	// Retrieves the joint names the request supports.
	SupportedJointNames() VNAnimalBodyPoseObservationJointName
	SetSupportedJointNames(value VNAnimalBodyPoseObservationJointName)
	// Retrieves the joint group names the request supports.
	SupportedJointsGroupNames() VNAnimalBodyPoseObservationJointsGroupName
	SetSupportedJointsGroupNames(value VNAnimalBodyPoseObservationJointsGroupName)

	// Retrieves the joint names the request supports.
	SupportedJointNamesAndReturnError() ([]string, error)
	// Retrieves the joint group names the request supports.
	SupportedJointsGroupNamesAndReturnError() ([]string, error)
}

An interface definition for the VNDetectAnimalBodyPoseRequest class.

Determining Supported Joints ¶

• [IVNDetectAnimalBodyPoseRequest.SupportedJointNames]: Retrieves the joint names the request supports.
• [IVNDetectAnimalBodyPoseRequest.SetSupportedJointNames]
• [IVNDetectAnimalBodyPoseRequest.SupportedJointsGroupNames]: Retrieves the joint group names the request supports.
• [IVNDetectAnimalBodyPoseRequest.SetSupportedJointsGroupNames]

See: https://developer.apple.com/documentation/Vision/VNDetectAnimalBodyPoseRequest

type IVNDetectBarcodesRequest ¶

type IVNDetectBarcodesRequest interface {
	IVNImageBasedRequest

	// Returns the barcode symbologies that the request supports.
	SupportedSymbologiesAndReturnError() ([]string, error)
	// The barcode symbologies that the request detects in an image.
	Symbologies() []string
	SetSymbologies(value []string)
	// A Boolean value that indicates whether to coalesce multiple codes based on the symbology.
	CoalesceCompositeSymbologies() bool
	SetCoalesceCompositeSymbologies(value bool)

	// A constant for specifying revision 3 of the barcode detection request.
	VNDetectBarcodesRequestRevision3() int
	// A constant for specifying revision 2 of the barcode detection request.
	VNDetectBarcodesRequestRevision2() int
	// A constant for specifying revision 1 of the barcode detection request.
	VNDetectBarcodesRequestRevision1() int
}

An interface definition for the VNDetectBarcodesRequest class.

Specifying Symbologies ¶

• [IVNDetectBarcodesRequest.SupportedSymbologiesAndReturnError]: Returns the barcode symbologies that the request supports.
• [IVNDetectBarcodesRequest.Symbologies]: The barcode symbologies that the request detects in an image.
• [IVNDetectBarcodesRequest.SetSymbologies]
• [IVNDetectBarcodesRequest.CoalesceCompositeSymbologies]: A Boolean value that indicates whether to coalesce multiple codes based on the symbology.
• [IVNDetectBarcodesRequest.SetCoalesceCompositeSymbologies]

Identifying Request Revisions ¶

• [IVNDetectBarcodesRequest.VNDetectBarcodesRequestRevision3]: A constant for specifying revision 3 of the barcode detection request.
• [IVNDetectBarcodesRequest.VNDetectBarcodesRequestRevision2]: A constant for specifying revision 2 of the barcode detection request.
• [IVNDetectBarcodesRequest.VNDetectBarcodesRequestRevision1]: A constant for specifying revision 1 of the barcode detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectBarcodesRequest

type IVNDetectContoursRequest ¶

type IVNDetectContoursRequest interface {
	IVNImageBasedRequest

	// The amount by which to adjust the image contrast.
	ContrastAdjustment() float32
	SetContrastAdjustment(value float32)
	// The pixel value to use as a pivot for the contrast.
	ContrastPivot() foundation.NSNumber
	SetContrastPivot(value foundation.NSNumber)
	// A Boolean value that indicates whether the request detects a dark object on a light background to aid in detection.
	DetectsDarkOnLight() bool
	SetDetectsDarkOnLight(value bool)
	// The maximum image dimension to use for contour detection.
	MaximumImageDimension() uint
	SetMaximumImageDimension(value uint)

	// A constant for specifying revision 1 of the contours detection request.
	VNDetectContourRequestRevision1() int
}

An interface definition for the VNDetectContoursRequest class.

Configuring the Request ¶

• [IVNDetectContoursRequest.ContrastAdjustment]: The amount by which to adjust the image contrast.
• [IVNDetectContoursRequest.SetContrastAdjustment]
• [IVNDetectContoursRequest.ContrastPivot]: The pixel value to use as a pivot for the contrast.
• [IVNDetectContoursRequest.SetContrastPivot]
• [IVNDetectContoursRequest.DetectsDarkOnLight]: A Boolean value that indicates whether the request detects a dark object on a light background to aid in detection.
• [IVNDetectContoursRequest.SetDetectsDarkOnLight]
• [IVNDetectContoursRequest.MaximumImageDimension]: The maximum image dimension to use for contour detection.
• [IVNDetectContoursRequest.SetMaximumImageDimension]

Identifying Request Revisions ¶

• [IVNDetectContoursRequest.VNDetectContourRequestRevision1]: A constant for specifying revision 1 of the contours detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectContoursRequest

type IVNDetectDocumentSegmentationRequest ¶

type IVNDetectDocumentSegmentationRequest interface {
	IVNImageBasedRequest

	// A constant for specifying revision 1 of the document segmentation request.
	VNDetectDocumentSegmentationRequestRevision1() int
}

An interface definition for the VNDetectDocumentSegmentationRequest class.

Identifying Request Revisions ¶

• [IVNDetectDocumentSegmentationRequest.VNDetectDocumentSegmentationRequestRevision1]: A constant for specifying revision 1 of the document segmentation request.

See: https://developer.apple.com/documentation/Vision/VNDetectDocumentSegmentationRequest

type IVNDetectFaceCaptureQualityRequest ¶

type IVNDetectFaceCaptureQualityRequest interface {
	IVNImageBasedRequest
	VNFaceObservationAccepting

	// Revision 2 of the request algorithm.
	VNDetectFaceCaptureQualityRequestRevision2() int
	// A constant for specifying revision 1 of the face capture detection request.
	VNDetectFaceCaptureQualityRequestRevision1() int

	// A value that indicates the quality of the face capture.
	FaceCaptureQuality() float32
	SetFaceCaptureQuality(value float32)
}

An interface definition for the VNDetectFaceCaptureQualityRequest class.

Identifying Request Revisions ¶

• [IVNDetectFaceCaptureQualityRequest.VNDetectFaceCaptureQualityRequestRevision2]: Revision 2 of the request algorithm.
• [IVNDetectFaceCaptureQualityRequest.VNDetectFaceCaptureQualityRequestRevision1]: A constant for specifying revision 1 of the face capture detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectFaceCaptureQualityRequest

type IVNDetectFaceLandmarksRequest ¶

type IVNDetectFaceLandmarksRequest interface {
	IVNImageBasedRequest

	// A variable that describes how a face landmarks request orders or enumerates the resulting features.
	Constellation() VNRequestFaceLandmarksConstellation
	SetConstellation(value VNRequestFaceLandmarksConstellation)

	// A constant for specifying revision 3 of the face landmarks detection request.
	VNDetectFaceLandmarksRequestRevision3() int
	// A constant for specifying revision 2 of the face landmarks detection request.
	VNDetectFaceLandmarksRequestRevision2() int
	// A constant for specifying revision 1 of the face landmarks detection request.
	VNDetectFaceLandmarksRequestRevision1() int
}

An interface definition for the VNDetectFaceLandmarksRequest class.

Locating Face Landmarks ¶

• [IVNDetectFaceLandmarksRequest.Constellation]: A variable that describes how a face landmarks request orders or enumerates the resulting features.
• [IVNDetectFaceLandmarksRequest.SetConstellation]

Identifying Request Revisions ¶

• [IVNDetectFaceLandmarksRequest.VNDetectFaceLandmarksRequestRevision3]: A constant for specifying revision 3 of the face landmarks detection request.
• [IVNDetectFaceLandmarksRequest.VNDetectFaceLandmarksRequestRevision2]: A constant for specifying revision 2 of the face landmarks detection request.
• [IVNDetectFaceLandmarksRequest.VNDetectFaceLandmarksRequestRevision1]: A constant for specifying revision 1 of the face landmarks detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectFaceLandmarksRequest

type IVNDetectFaceRectanglesRequest ¶

type IVNDetectFaceRectanglesRequest interface {
	IVNImageBasedRequest

	// A constant for specifying revision 3 of the face rectangles detection request.
	VNDetectFaceRectanglesRequestRevision3() int
	// A constant for specifying revision 2 of the face rectangles detection request.
	VNDetectFaceRectanglesRequestRevision2() int
	// A constant for specifying revision 1 of the face rectangles detection request.
	VNDetectFaceRectanglesRequestRevision1() int
}

An interface definition for the VNDetectFaceRectanglesRequest class.

Identifying Request Revisions ¶

• [IVNDetectFaceRectanglesRequest.VNDetectFaceRectanglesRequestRevision3]: A constant for specifying revision 3 of the face rectangles detection request.
• [IVNDetectFaceRectanglesRequest.VNDetectFaceRectanglesRequestRevision2]: A constant for specifying revision 2 of the face rectangles detection request.
• [IVNDetectFaceRectanglesRequest.VNDetectFaceRectanglesRequestRevision1]: A constant for specifying revision 1 of the face rectangles detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectFaceRectanglesRequest

type IVNDetectHorizonRequest ¶

type IVNDetectHorizonRequest interface {
	IVNImageBasedRequest

	// A constant for specifying revision 1 of the horizon detection request.
	VNDetectHorizonRequestRevision1() int
}

An interface definition for the VNDetectHorizonRequest class.

Identifying Request Revisions ¶

• [IVNDetectHorizonRequest.VNDetectHorizonRequestRevision1]: A constant for specifying revision 1 of the horizon detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectHorizonRequest

type IVNDetectHumanBodyPose3DRequest ¶

type IVNDetectHumanBodyPose3DRequest interface {
	IVNStatefulRequest

	// Returns the joint names the request supports.
	SupportedJointsGroupNames() VNHumanBodyPose3DObservationJointsGroupName
	SetSupportedJointsGroupNames(value VNHumanBodyPose3DObservationJointsGroupName)
	// Returns the joint group names the request supports.
	SupportedJointNames() VNHumanBodyPose3DObservationJointName
	SetSupportedJointNames(value VNHumanBodyPose3DObservationJointName)

	// Returns the joint names the request supports.
	SupportedJointNamesAndReturnError() ([]string, error)
	// Returns the joint group names the request supports.
	SupportedJointsGroupNamesAndReturnError() ([]string, error)
}

An interface definition for the VNDetectHumanBodyPose3DRequest class.

Determining Supported Joints ¶

• [IVNDetectHumanBodyPose3DRequest.SupportedJointsGroupNames]: Returns the joint names the request supports.
• [IVNDetectHumanBodyPose3DRequest.SetSupportedJointsGroupNames]
• [IVNDetectHumanBodyPose3DRequest.SupportedJointNames]: Returns the joint group names the request supports.
• [IVNDetectHumanBodyPose3DRequest.SetSupportedJointNames]

See: https://developer.apple.com/documentation/Vision/VNDetectHumanBodyPose3DRequest

type IVNDetectHumanBodyPoseRequest ¶

type IVNDetectHumanBodyPoseRequest interface {
	IVNImageBasedRequest

	// Retrieves the supported joint names.
	SupportedJointNames() VNHumanBodyPoseObservationJointName
	SetSupportedJointNames(value VNHumanBodyPoseObservationJointName)
	// Retrieves the supported joint group names.
	SupportedJointsGroupNames() VNHumanBodyPoseObservationJointsGroupName
	SetSupportedJointsGroupNames(value VNHumanBodyPoseObservationJointsGroupName)

	// A constant for specifying revision 1 of the body pose detection request.
	VNDetectHumanBodyPoseRequestRevision1() int

	// Retrieves the supported joint names.
	SupportedJointNamesAndReturnError() ([]string, error)
	// Retrieves the supported joint group names.
	SupportedJointsGroupNamesAndReturnError() ([]string, error)
}

An interface definition for the VNDetectHumanBodyPoseRequest class.

Determining Supported Joints ¶

• [IVNDetectHumanBodyPoseRequest.SupportedJointNames]: Retrieves the supported joint names.
• [IVNDetectHumanBodyPoseRequest.SetSupportedJointNames]
• [IVNDetectHumanBodyPoseRequest.SupportedJointsGroupNames]: Retrieves the supported joint group names.
• [IVNDetectHumanBodyPoseRequest.SetSupportedJointsGroupNames]

Identifying Body Pose Revisions ¶

• [IVNDetectHumanBodyPoseRequest.VNDetectHumanBodyPoseRequestRevision1]: A constant for specifying revision 1 of the body pose detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectHumanBodyPoseRequest

type IVNDetectHumanHandPoseRequest ¶

type IVNDetectHumanHandPoseRequest interface {
	IVNImageBasedRequest

	// The maximum number of hands to detect in an image.
	MaximumHandCount() uint
	SetMaximumHandCount(value uint)

	// Retrieves the supported joint names.
	SupportedJointNames() VNHumanHandPoseObservationJointName
	SetSupportedJointNames(value VNHumanHandPoseObservationJointName)
	// Retrieves the supported joint group names.
	SupportedJointsGroupNames() VNHumanHandPoseObservationJointsGroupName
	SetSupportedJointsGroupNames(value VNHumanHandPoseObservationJointsGroupName)

	// A constant for specifying revision 1 of the hand pose detection request.
	VNDetectHumanHandPoseRequestRevision1() int

	// Retrieves the supported joint names.
	SupportedJointNamesAndReturnError() ([]string, error)
	// Retrieves the supported joint group names.
	SupportedJointsGroupNamesAndReturnError() ([]string, error)
}

An interface definition for the VNDetectHumanHandPoseRequest class.

Configuring the Request ¶

• [IVNDetectHumanHandPoseRequest.MaximumHandCount]: The maximum number of hands to detect in an image.
• [IVNDetectHumanHandPoseRequest.SetMaximumHandCount]

Determining Supported Joints ¶

• [IVNDetectHumanHandPoseRequest.SupportedJointNames]: Retrieves the supported joint names.
• [IVNDetectHumanHandPoseRequest.SetSupportedJointNames]
• [IVNDetectHumanHandPoseRequest.SupportedJointsGroupNames]: Retrieves the supported joint group names.
• [IVNDetectHumanHandPoseRequest.SetSupportedJointsGroupNames]

Identifying Hand Pose Revisions ¶

• [IVNDetectHumanHandPoseRequest.VNDetectHumanHandPoseRequestRevision1]: A constant for specifying revision 1 of the hand pose detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectHumanHandPoseRequest

type IVNDetectHumanRectanglesRequest ¶

type IVNDetectHumanRectanglesRequest interface {
	IVNImageBasedRequest

	// A Boolean value that indicates whether the request requires detecting a full body or upper body only to produce a result.
	UpperBodyOnly() bool
	SetUpperBodyOnly(value bool)

	// A constant for specifying revision 2 of the human rectangles detection request.
	VNDetectHumanRectanglesRequestRevision2() int
	// A constant for specifying revision 1 of the human rectangles detection request.
	VNDetectHumanRectanglesRequestRevision1() int
}

An interface definition for the VNDetectHumanRectanglesRequest class.

Configuring the Request ¶

• [IVNDetectHumanRectanglesRequest.UpperBodyOnly]: A Boolean value that indicates whether the request requires detecting a full body or upper body only to produce a result.
• [IVNDetectHumanRectanglesRequest.SetUpperBodyOnly]

Identifying Request Revisions ¶

• [IVNDetectHumanRectanglesRequest.VNDetectHumanRectanglesRequestRevision2]: A constant for specifying revision 2 of the human rectangles detection request.
• [IVNDetectHumanRectanglesRequest.VNDetectHumanRectanglesRequestRevision1]: A constant for specifying revision 1 of the human rectangles detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectHumanRectanglesRequest

type IVNDetectRectanglesRequest ¶

type IVNDetectRectanglesRequest interface {
	IVNImageBasedRequest

	// A `float` specifying the minimum aspect ratio of the rectangle to detect, defined as the shorter dimension over the longer dimension.
	MinimumAspectRatio() VNAspectRatio
	SetMinimumAspectRatio(value VNAspectRatio)
	// A `float` specifying the maximum aspect ratio of the rectangle to detect, defined as the shorter dimension over the longer dimension.
	MaximumAspectRatio() VNAspectRatio
	SetMaximumAspectRatio(value VNAspectRatio)
	// A float specifying the number of degrees a rectangle corner angle can deviate from 90°.
	QuadratureTolerance() VNDegrees
	SetQuadratureTolerance(value VNDegrees)
	// The minimum size of a rectangle to detect, as a proportion of the smallest dimension.
	MinimumSize() float32
	SetMinimumSize(value float32)
	// A value specifying the minimum acceptable confidence level.
	MinimumConfidence() VNConfidence
	SetMinimumConfidence(value VNConfidence)
	// An integer specifying the maximum number of rectangles Vision returns.
	MaximumObservations() uint
	SetMaximumObservations(value uint)

	// A constant for specifying revision 1 of the rectangle detection request.
	VNDetectRectanglesRequestRevision1() int
}

An interface definition for the VNDetectRectanglesRequest class.

Configuring Detection ¶

• [IVNDetectRectanglesRequest.MinimumAspectRatio]: A `float` specifying the minimum aspect ratio of the rectangle to detect, defined as the shorter dimension over the longer dimension.
• [IVNDetectRectanglesRequest.SetMinimumAspectRatio]
• [IVNDetectRectanglesRequest.MaximumAspectRatio]: A `float` specifying the maximum aspect ratio of the rectangle to detect, defined as the shorter dimension over the longer dimension.
• [IVNDetectRectanglesRequest.SetMaximumAspectRatio]
• [IVNDetectRectanglesRequest.QuadratureTolerance]: A float specifying the number of degrees a rectangle corner angle can deviate from 90°.
• [IVNDetectRectanglesRequest.SetQuadratureTolerance]
• [IVNDetectRectanglesRequest.MinimumSize]: The minimum size of a rectangle to detect, as a proportion of the smallest dimension.
• [IVNDetectRectanglesRequest.SetMinimumSize]
• [IVNDetectRectanglesRequest.MinimumConfidence]: A value specifying the minimum acceptable confidence level.
• [IVNDetectRectanglesRequest.SetMinimumConfidence]
• [IVNDetectRectanglesRequest.MaximumObservations]: An integer specifying the maximum number of rectangles Vision returns.
• [IVNDetectRectanglesRequest.SetMaximumObservations]

Identifying Request Revisions ¶

• [IVNDetectRectanglesRequest.VNDetectRectanglesRequestRevision1]: A constant for specifying revision 1 of the rectangle detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectRectanglesRequest

type IVNDetectTextRectanglesRequest ¶

type IVNDetectTextRectanglesRequest interface {
	IVNImageBasedRequest

	// A Boolean value that indicates whether the request detects character bounding boxes.
	ReportCharacterBoxes() bool
	SetReportCharacterBoxes(value bool)

	// A constant for specifying revision 1 of the text rectangles detection request.
	VNDetectTextRectanglesRequestRevision1() int
}

An interface definition for the VNDetectTextRectanglesRequest class.

Configuring a Request ¶

• [IVNDetectTextRectanglesRequest.ReportCharacterBoxes]: A Boolean value that indicates whether the request detects character bounding boxes.
• [IVNDetectTextRectanglesRequest.SetReportCharacterBoxes]

Identifying Request Revisions ¶

• [IVNDetectTextRectanglesRequest.VNDetectTextRectanglesRequestRevision1]: A constant for specifying revision 1 of the text rectangles detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectTextRectanglesRequest

type IVNDetectTrajectoriesRequest ¶

type IVNDetectTrajectoriesRequest interface {
	IVNStatefulRequest

	// Creates a new request to detect trajectories.
	InitWithFrameAnalysisSpacingTrajectoryLengthCompletionHandler(frameAnalysisSpacing objectivec.IObject, trajectoryLength int, completionHandler ErrorHandler) VNDetectTrajectoriesRequest

	// The requested target frame time for processing trajectory detection.
	TargetFrameTime() objectivec.IObject
	SetTargetFrameTime(value objectivec.IObject)
	// The number of points to detect before calculating a trajectory.
	TrajectoryLength() int
	// The minimum radius of the bounding circle of the object to track.
	ObjectMinimumNormalizedRadius() float32
	SetObjectMinimumNormalizedRadius(value float32)
	// The maximum radius of the bounding circle of the object to track.
	ObjectMaximumNormalizedRadius() float32
	SetObjectMaximumNormalizedRadius(value float32)

	// A constant for specifying revision 1 of the trajectories detection request.
	VNDetectTrajectoriesRequestRevision1() int
}

An interface definition for the VNDetectTrajectoriesRequest class.

Creating a Request ¶

• [IVNDetectTrajectoriesRequest.InitWithFrameAnalysisSpacingTrajectoryLengthCompletionHandler]: Creates a new request to detect trajectories.

Configuring the Request ¶

• [IVNDetectTrajectoriesRequest.TargetFrameTime]: The requested target frame time for processing trajectory detection.
• [IVNDetectTrajectoriesRequest.SetTargetFrameTime]
• [IVNDetectTrajectoriesRequest.TrajectoryLength]: The number of points to detect before calculating a trajectory.
• [IVNDetectTrajectoriesRequest.ObjectMinimumNormalizedRadius]: The minimum radius of the bounding circle of the object to track.
• [IVNDetectTrajectoriesRequest.SetObjectMinimumNormalizedRadius]
• [IVNDetectTrajectoriesRequest.ObjectMaximumNormalizedRadius]: The maximum radius of the bounding circle of the object to track.
• [IVNDetectTrajectoriesRequest.SetObjectMaximumNormalizedRadius]

Identifying Request Revisions ¶

• [IVNDetectTrajectoriesRequest.VNDetectTrajectoriesRequestRevision1]: A constant for specifying revision 1 of the trajectories detection request.

See: https://developer.apple.com/documentation/Vision/VNDetectTrajectoriesRequest

type IVNDetectedObjectObservation ¶

type IVNDetectedObjectObservation interface {
	IVNObservation

	// The bounding box of the object that the request detects.
	BoundingBox() corefoundation.CGRect

	// A resulting pixel buffer from a request to generate a segmentation mask for an image.
	GlobalSegmentationMask() IVNPixelBufferObservation

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNDetectedObjectObservation class.

Locating a Detected Object ¶

• [IVNDetectedObjectObservation.BoundingBox]: The bounding box of the object that the request detects.

Accessing an Image Mask ¶

• [IVNDetectedObjectObservation.GlobalSegmentationMask]: A resulting pixel buffer from a request to generate a segmentation mask for an image.

See: https://developer.apple.com/documentation/Vision/VNDetectedObjectObservation

type IVNDetectedPoint ¶

type IVNDetectedPoint interface {
	IVNPoint

	// A confidence score that indicates the detected point’s accuracy.
	Confidence() VNConfidence

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNDetectedPoint class.

Inspecting a Point ¶

• [IVNDetectedPoint.Confidence]: A confidence score that indicates the detected point’s accuracy.

See: https://developer.apple.com/documentation/Vision/VNDetectedPoint

type IVNFaceLandmarkRegion ¶

type IVNFaceLandmarkRegion interface {
	objectivec.IObject
	VNRequestRevisionProviding

	// The number of points in the face region.
	PointCount() uint

	// The facial features of the detected face.
	Landmarks() IVNFaceLandmarks2D
	SetLandmarks(value IVNFaceLandmarks2D)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNFaceLandmarkRegion class.

Instance Properties ¶

• [IVNFaceLandmarkRegion.PointCount]: The number of points in the face region.

See: https://developer.apple.com/documentation/Vision/VNFaceLandmarkRegion

type IVNFaceLandmarkRegion2D ¶

type IVNFaceLandmarkRegion2D interface {
	IVNFaceLandmarkRegion

	// An enumeration that describes how to interpret the points the region provides.
	PointsClassification() VNPointsClassification

	// A buffer in memory containing normalized landmark points.
	NormalizedPoints() unsafe.Pointer
	// An array of precision estimates for each landmark point.
	PrecisionEstimatesPerPoint() []foundation.NSNumber
	// A buffer in memory containing landmark points in the coordinate space of the specified image size.
	PointsInImageOfSize(imageSize corefoundation.CGSize) corefoundation.CGPoint
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNFaceLandmarkRegion2D class.

Describing Region Points ¶

• [IVNFaceLandmarkRegion2D.PointsClassification]: An enumeration that describes how to interpret the points the region provides.

See: https://developer.apple.com/documentation/Vision/VNFaceLandmarkRegion2D

type IVNFaceLandmarks ¶

type IVNFaceLandmarks interface {
	objectivec.IObject
	VNRequestRevisionProviding

	// A confidence estimate for the detected landmarks.
	Confidence() VNConfidence

	// The facial features of the detected face.
	Landmarks() IVNFaceLandmarks2D
	SetLandmarks(value IVNFaceLandmarks2D)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNFaceLandmarks class.

Determining Accuracy ¶

• [IVNFaceLandmarks.Confidence]: A confidence estimate for the detected landmarks.

See: https://developer.apple.com/documentation/Vision/VNFaceLandmarks

type IVNFaceLandmarks2D ¶

type IVNFaceLandmarks2D interface {
	IVNFaceLandmarks

	// The region containing all face landmark points.
	AllPoints() IVNFaceLandmarkRegion2D
	// The region containing points that trace the face contour from the left cheek, over the chin, to the right cheek.
	FaceContour() IVNFaceLandmarkRegion2D
	// The region containing points that outline the left eye.
	LeftEye() IVNFaceLandmarkRegion2D
	// The region containing points that outline the right eye.
	RightEye() IVNFaceLandmarkRegion2D
	// The region containing points that trace the left eyebrow.
	LeftEyebrow() IVNFaceLandmarkRegion2D
	// The region containing points that trace the right eyebrow.
	RightEyebrow() IVNFaceLandmarkRegion2D
	// The region containing points that outline the nose.
	Nose() IVNFaceLandmarkRegion2D
	// The region containing points that trace the center crest of the nose.
	NoseCrest() IVNFaceLandmarkRegion2D
	// The region containing points that trace a vertical line down the center of the face.
	MedianLine() IVNFaceLandmarkRegion2D
	// The region containing points that outline the outside of the lips.
	OuterLips() IVNFaceLandmarkRegion2D
	// The region containing points that outline the space between the lips.
	InnerLips() IVNFaceLandmarkRegion2D
	// The region containing the point where the left pupil is located.
	LeftPupil() IVNFaceLandmarkRegion2D
	// The region containing the point where the right pupil is located.
	RightPupil() IVNFaceLandmarkRegion2D

	// The bounding box of the object that the request detects.
	BoundingBox() corefoundation.CGRect
	SetBoundingBox(value corefoundation.CGRect)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNFaceLandmarks2D class.

Face Landmark Points ¶

• [IVNFaceLandmarks2D.AllPoints]: The region containing all face landmark points.
• [IVNFaceLandmarks2D.FaceContour]: The region containing points that trace the face contour from the left cheek, over the chin, to the right cheek.
• [IVNFaceLandmarks2D.LeftEye]: The region containing points that outline the left eye.
• [IVNFaceLandmarks2D.RightEye]: The region containing points that outline the right eye.
• [IVNFaceLandmarks2D.LeftEyebrow]: The region containing points that trace the left eyebrow.
• [IVNFaceLandmarks2D.RightEyebrow]: The region containing points that trace the right eyebrow.
• [IVNFaceLandmarks2D.Nose]: The region containing points that outline the nose.
• [IVNFaceLandmarks2D.NoseCrest]: The region containing points that trace the center crest of the nose.
• [IVNFaceLandmarks2D.MedianLine]: The region containing points that trace a vertical line down the center of the face.
• [IVNFaceLandmarks2D.OuterLips]: The region containing points that outline the outside of the lips.
• [IVNFaceLandmarks2D.InnerLips]: The region containing points that outline the space between the lips.
• [IVNFaceLandmarks2D.LeftPupil]: The region containing the point where the left pupil is located.
• [IVNFaceLandmarks2D.RightPupil]: The region containing the point where the right pupil is located.

See: https://developer.apple.com/documentation/Vision/VNFaceLandmarks2D

type IVNFaceObservation ¶

type IVNFaceObservation interface {
	IVNDetectedObjectObservation

	// The facial features of the detected face.
	Landmarks() IVNFaceLandmarks2D

	// The roll angle of a face in radians.
	Roll() foundation.NSNumber
	// The yaw angle of a face in radians.
	Yaw() foundation.NSNumber
	// The pitch angle of a face in radians.
	Pitch() foundation.NSNumber

	// A value that indicates the quality of the face capture.
	FaceCaptureQuality() foundation.NSNumber
	// The results of the face-capture quality request.
	Results() IVNFaceObservation
	SetResults(value IVNFaceObservation)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNFaceObservation class.

Identifying Landmarks ¶

• [IVNFaceObservation.Landmarks]: The facial features of the detected face.

Determining Facial Orientation ¶

• [IVNFaceObservation.Roll]: The roll angle of a face in radians.
• [IVNFaceObservation.Yaw]: The yaw angle of a face in radians.
• [IVNFaceObservation.Pitch]: The pitch angle of a face in radians.

See: https://developer.apple.com/documentation/Vision/VNFaceObservation

type IVNFeaturePrintObservation ¶

type IVNFeaturePrintObservation interface {
	IVNObservation

	// The feature print data.
	Data() foundation.INSData
	// The total number of elements in the data.
	ElementCount() uint

	// The type of each element in the data.
	ElementType() VNElementType

	// Computes the distance between two feature print observations.
	ComputeDistanceToFeaturePrintObservationError(featurePrint VNFeaturePrintObservation) (float32, error)

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNFeaturePrintObservation class.

Fetching Feature Print Data ¶

• [IVNFeaturePrintObservation.Data]: The feature print data.
• [IVNFeaturePrintObservation.ElementCount]: The total number of elements in the data.

Determining Types of Feature Prints ¶

• [IVNFeaturePrintObservation.ElementType]: The type of each element in the data.

Computing Distance Between Features ¶

• [IVNFeaturePrintObservation.ComputeDistanceToFeaturePrintObservationError]: Computes the distance between two feature print observations.

See: https://developer.apple.com/documentation/Vision/VNFeaturePrintObservation

type IVNGenerateAttentionBasedSaliencyImageRequest ¶

type IVNGenerateAttentionBasedSaliencyImageRequest interface {
	IVNImageBasedRequest

	// A constant for specifying revision 1 of the image saliency request.
	VNGenerateAttentionBasedSaliencyImageRequestRevision1() int
}

An interface definition for the VNGenerateAttentionBasedSaliencyImageRequest class.

Identifying Request Revisions ¶

• [IVNGenerateAttentionBasedSaliencyImageRequest.VNGenerateAttentionBasedSaliencyImageRequestRevision1]: A constant for specifying revision 1 of the image saliency request.

See: https://developer.apple.com/documentation/Vision/VNGenerateAttentionBasedSaliencyImageRequest

type IVNGenerateForegroundInstanceMaskRequest ¶

type IVNGenerateForegroundInstanceMaskRequest interface {
	IVNImageBasedRequest

	// A constant for specifying the first revision of the foreground instance mask request.
	VNGenerateForegroundInstanceMaskRequestRevision1() int
}

An interface definition for the VNGenerateForegroundInstanceMaskRequest class.

See: https://developer.apple.com/documentation/Vision/VNGenerateForegroundInstanceMaskRequest

type IVNGenerateImageFeaturePrintRequest ¶

type IVNGenerateImageFeaturePrintRequest interface {
	IVNImageBasedRequest

	// An optional setting that tells the algorithm how to scale an input image before generating the feature print.
	ImageCropAndScaleOption() VNImageCropAndScaleOption
	SetImageCropAndScaleOption(value VNImageCropAndScaleOption)

	// A constant for specifying the first revision of the feature-print request.
	VNGenerateImageFeaturePrintRequestRevision1() int
}

An interface definition for the VNGenerateImageFeaturePrintRequest class.

Scaling and Cropping Images ¶

• [IVNGenerateImageFeaturePrintRequest.ImageCropAndScaleOption]: An optional setting that tells the algorithm how to scale an input image before generating the feature print.
• [IVNGenerateImageFeaturePrintRequest.SetImageCropAndScaleOption]

Identifying Request Revisions ¶

• [IVNGenerateImageFeaturePrintRequest.VNGenerateImageFeaturePrintRequestRevision1]: A constant for specifying the first revision of the feature-print request.

See: https://developer.apple.com/documentation/Vision/VNGenerateImageFeaturePrintRequest

type IVNGenerateObjectnessBasedSaliencyImageRequest ¶

type IVNGenerateObjectnessBasedSaliencyImageRequest interface {
	IVNImageBasedRequest

	// A constant for specifying revision 1 of the image saliency request.
	VNGenerateObjectnessBasedSaliencyImageRequestRevision1() int
}

An interface definition for the VNGenerateObjectnessBasedSaliencyImageRequest class.

Identifying Request Revisions ¶

• [IVNGenerateObjectnessBasedSaliencyImageRequest.VNGenerateObjectnessBasedSaliencyImageRequestRevision1]: A constant for specifying revision 1 of the image saliency request.

See: https://developer.apple.com/documentation/Vision/VNGenerateObjectnessBasedSaliencyImageRequest

type IVNGenerateOpticalFlowRequest ¶

type IVNGenerateOpticalFlowRequest interface {
	IVNTargetedImageRequest

	// The accuracy level for computing optical flow.
	ComputationAccuracy() VNGenerateOpticalFlowRequestComputationAccuracy
	SetComputationAccuracy(value VNGenerateOpticalFlowRequestComputationAccuracy)
	// The output buffer’s pixel format.
	OutputPixelFormat() uint32
	SetOutputPixelFormat(value uint32)
	// A Boolean value that indicates whether to keep the raw pixel buffer coming from the machine learning network.
	KeepNetworkOutput() bool
	SetKeepNetworkOutput(value bool)

	// A constant for specifying revision 2 of the optical flow generation request.
	VNGenerateOpticalFlowRequestRevision2() int
	// A constant for specifying revision 1 of the optical flow generation request.
	VNGenerateOpticalFlowRequestRevision1() int
}

An interface definition for the VNGenerateOpticalFlowRequest class.

Configuring the Request ¶

• [IVNGenerateOpticalFlowRequest.ComputationAccuracy]: The accuracy level for computing optical flow.
• [IVNGenerateOpticalFlowRequest.SetComputationAccuracy]
• [IVNGenerateOpticalFlowRequest.OutputPixelFormat]: The output buffer’s pixel format.
• [IVNGenerateOpticalFlowRequest.SetOutputPixelFormat]
• [IVNGenerateOpticalFlowRequest.KeepNetworkOutput]: A Boolean value that indicates whether to keep the raw pixel buffer coming from the machine learning network.
• [IVNGenerateOpticalFlowRequest.SetKeepNetworkOutput]

Identifying Request Revisions ¶

• [IVNGenerateOpticalFlowRequest.VNGenerateOpticalFlowRequestRevision2]: A constant for specifying revision 2 of the optical flow generation request.
• [IVNGenerateOpticalFlowRequest.VNGenerateOpticalFlowRequestRevision1]: A constant for specifying revision 1 of the optical flow generation request.

See: https://developer.apple.com/documentation/Vision/VNGenerateOpticalFlowRequest

type IVNGeneratePersonInstanceMaskRequest ¶

type IVNGeneratePersonInstanceMaskRequest interface {
	IVNImageBasedRequest

	// A constant for specifying revision 1 of the person instance mask request.
	VNGeneratePersonInstanceMaskRequestRevision1() int
}

An interface definition for the VNGeneratePersonInstanceMaskRequest class.

Identifying Request Revisions ¶

• [IVNGeneratePersonInstanceMaskRequest.VNGeneratePersonInstanceMaskRequestRevision1]: A constant for specifying revision 1 of the person instance mask request.

See: https://developer.apple.com/documentation/Vision/VNGeneratePersonInstanceMaskRequest

type IVNGeneratePersonSegmentationRequest ¶

type IVNGeneratePersonSegmentationRequest interface {
	IVNStatefulRequest

	// The pixel format of the output image.
	OutputPixelFormat() uint32
	SetOutputPixelFormat(value uint32)
	// A value that indicates how the request balances accuracy and performance.
	QualityLevel() VNGeneratePersonSegmentationRequestQualityLevel
	SetQualityLevel(value VNGeneratePersonSegmentationRequestQualityLevel)

	// Returns a list of output pixel formats that the request supports.
	SupportedOutputPixelFormatsAndReturnError() ([]foundation.NSNumber, error)

	// A constant for specifying revision 1 of the person segmentation generation request.
	VNGeneratePersonSegmentationRequestRevision1() int
}

An interface definition for the VNGeneratePersonSegmentationRequest class.

Configuring the Request ¶

• [IVNGeneratePersonSegmentationRequest.OutputPixelFormat]: The pixel format of the output image.
• [IVNGeneratePersonSegmentationRequest.SetOutputPixelFormat]
• [IVNGeneratePersonSegmentationRequest.QualityLevel]: A value that indicates how the request balances accuracy and performance.
• [IVNGeneratePersonSegmentationRequest.SetQualityLevel]

Getting the supported output pixel formats ¶

• [IVNGeneratePersonSegmentationRequest.SupportedOutputPixelFormatsAndReturnError]: Returns a list of output pixel formats that the request supports.

Identifying Request Revisions ¶

• [IVNGeneratePersonSegmentationRequest.VNGeneratePersonSegmentationRequestRevision1]: A constant for specifying revision 1 of the person segmentation generation request.

See: https://developer.apple.com/documentation/Vision/VNGeneratePersonSegmentationRequest

type IVNGeometryUtils ¶

type IVNGeometryUtils interface {
	objectivec.IObject
}

An interface definition for the VNGeometryUtils class.

See: https://developer.apple.com/documentation/Vision/VNGeometryUtils

type IVNHomographicImageRegistrationRequest ¶

type IVNHomographicImageRegistrationRequest interface {
	IVNImageRegistrationRequest

	// A constant for specifying revision 1 of the homographic image registration request.
	VNHomographicImageRegistrationRequestRevision1() int
}

An interface definition for the VNHomographicImageRegistrationRequest class.

Identifying Request Revisions ¶

• [IVNHomographicImageRegistrationRequest.VNHomographicImageRegistrationRequestRevision1]: A constant for specifying revision 1 of the homographic image registration request.

See: https://developer.apple.com/documentation/Vision/VNHomographicImageRegistrationRequest

type IVNHorizonObservation ¶

type IVNHorizonObservation interface {
	IVNObservation

	// The angle of the observed horizon.
	Angle() float64
	// The transform to apply to the detected horizon.
	Transform() corefoundation.CGAffineTransform
	// Creates an affine transform for the specified image width and height.
	TransformForImageWidthHeight(width uintptr, height uintptr) corefoundation.CGAffineTransform

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNHorizonObservation class.

Evaluating the Horizon ¶

• [IVNHorizonObservation.Angle]: The angle of the observed horizon.
• [IVNHorizonObservation.Transform]: The transform to apply to the detected horizon.
• [IVNHorizonObservation.TransformForImageWidthHeight]: Creates an affine transform for the specified image width and height.

See: https://developer.apple.com/documentation/Vision/VNHorizonObservation

type IVNHumanBodyPose3DObservation ¶

type IVNHumanBodyPose3DObservation interface {
	IVNRecognizedPoints3DObservation

	// The names of the available joints in the observation.
	AvailableJointNames() []string
	// The available joint group names in the observation.
	AvailableJointsGroupNames() []string
	// Returns the point for a joint name that the observation recognizes.
	RecognizedPointForJointNameError(jointName VNHumanBodyPose3DObservationJointName) (IVNHumanBodyRecognizedPoint3D, error)
	// Returns a collection of points for the group name you specify.
	RecognizedPointsForJointsGroupNameError(jointsGroupName VNHumanBodyPose3DObservationJointsGroupName) (foundation.INSDictionary, error)

	// Returns a 2D point for the joint name you specify, relative to the input image.
	PointInImageForJointNameError(jointName VNHumanBodyPose3DObservationJointName) (IVNPoint, error)

	// Returns the parent joint of the joint name you specify.
	ParentJointNameForJointName(jointName VNHumanBodyPose3DObservationJointName) VNHumanBodyPose3DObservationJointName

	// The technique the framework uses to estimate body height.
	HeightEstimation() VNHumanBodyPose3DObservationHeightEstimation
	// The estimated human body height, in meters.
	BodyHeight() float32

	// A transform from the skeleton hip to the camera.
	CameraOriginMatrix() objectivec.IObject

	// Gets a position relative to the camera for the body joint you specify.
	GetCameraRelativePositionForJointNameError(modelPositionOut objectivec.IObject, jointName VNHumanBodyPose3DObservationJointName) (bool, error)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNHumanBodyPose3DObservation class.

Accessing Points ¶

• [IVNHumanBodyPose3DObservation.AvailableJointNames]: The names of the available joints in the observation.
• [IVNHumanBodyPose3DObservation.AvailableJointsGroupNames]: The available joint group names in the observation.
• [IVNHumanBodyPose3DObservation.RecognizedPointForJointNameError]: Returns the point for a joint name that the observation recognizes.
• [IVNHumanBodyPose3DObservation.RecognizedPointsForJointsGroupNameError]: Returns a collection of points for the group name you specify.

Getting the Joint Position ¶

• [IVNHumanBodyPose3DObservation.PointInImageForJointNameError]: Returns a 2D point for the joint name you specify, relative to the input image.

Getting the Parent Joint Name ¶

• [IVNHumanBodyPose3DObservation.ParentJointNameForJointName]: Returns the parent joint of the joint name you specify.

Getting the Body Height ¶

• [IVNHumanBodyPose3DObservation.HeightEstimation]: The technique the framework uses to estimate body height.
• [IVNHumanBodyPose3DObservation.BodyHeight]: The estimated human body height, in meters.

Getting the Camera Position ¶

• [IVNHumanBodyPose3DObservation.CameraOriginMatrix]: A transform from the skeleton hip to the camera.

See: https://developer.apple.com/documentation/Vision/VNHumanBodyPose3DObservation

type IVNHumanBodyPoseObservation ¶

type IVNHumanBodyPoseObservation interface {
	IVNRecognizedPointsObservation

	// The names of the available joints in the observation.
	AvailableJointNames() []string
	// The available joint group names in the observation.
	AvailableJointsGroupNames() []string
	// Retrieves the recognized point for a joint name.
	RecognizedPointForJointNameError(jointName VNHumanBodyPoseObservationJointName) (IVNRecognizedPoint, error)
	// Retrieves the recognized points associated with the joint group name.
	RecognizedPointsForJointsGroupNameError(jointsGroupName VNHumanBodyPoseObservationJointsGroupName) (foundation.INSDictionary, error)

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNHumanBodyPoseObservation class.

Accessing Points ¶

• [IVNHumanBodyPoseObservation.AvailableJointNames]: The names of the available joints in the observation.
• [IVNHumanBodyPoseObservation.AvailableJointsGroupNames]: The available joint group names in the observation.
• [IVNHumanBodyPoseObservation.RecognizedPointForJointNameError]: Retrieves the recognized point for a joint name.
• [IVNHumanBodyPoseObservation.RecognizedPointsForJointsGroupNameError]: Retrieves the recognized points associated with the joint group name.

See: https://developer.apple.com/documentation/Vision/VNHumanBodyPoseObservation

type IVNHumanBodyRecognizedPoint3D ¶

type IVNHumanBodyRecognizedPoint3D interface {
	IVNRecognizedPoint3D

	// The three-dimensional position.
	LocalPosition() objectivec.IObject

	// The parent joint in the observation.
	ParentJoint() VNHumanBodyPose3DObservationJointName

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNHumanBodyRecognizedPoint3D class.

Getting the Position ¶

• [IVNHumanBodyRecognizedPoint3D.LocalPosition]: The three-dimensional position.

Getting the Parent Joint ¶

• [IVNHumanBodyRecognizedPoint3D.ParentJoint]: The parent joint in the observation.

See: https://developer.apple.com/documentation/Vision/VNHumanBodyRecognizedPoint3D

type IVNHumanHandPoseObservation ¶

type IVNHumanHandPoseObservation interface {
	IVNRecognizedPointsObservation

	// The names of the available joints in the observation.
	AvailableJointNames() []string
	// The joint group names available in the observation.
	AvailableJointsGroupNames() []string
	// Retrieves the recognized point for a joint name.
	RecognizedPointForJointNameError(jointName VNHumanHandPoseObservationJointName) (IVNRecognizedPoint, error)
	// Retrieves the recognized points associated with the joint group name.
	RecognizedPointsForJointsGroupNameError(jointsGroupName VNHumanHandPoseObservationJointsGroupName) (foundation.INSDictionary, error)

	// The chirality, or handedness, of a pose.
	Chirality() VNChirality

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNHumanHandPoseObservation class.

Retrieving Points ¶

• [IVNHumanHandPoseObservation.AvailableJointNames]: The names of the available joints in the observation.
• [IVNHumanHandPoseObservation.AvailableJointsGroupNames]: The joint group names available in the observation.
• [IVNHumanHandPoseObservation.RecognizedPointForJointNameError]: Retrieves the recognized point for a joint name.
• [IVNHumanHandPoseObservation.RecognizedPointsForJointsGroupNameError]: Retrieves the recognized points associated with the joint group name.

Determining the Chirality ¶

• [IVNHumanHandPoseObservation.Chirality]: The chirality, or handedness, of a pose.

See: https://developer.apple.com/documentation/Vision/VNHumanHandPoseObservation

type IVNHumanObservation ¶

type IVNHumanObservation interface {
	IVNDetectedObjectObservation

	// A Boolean value that indicates whether the observation represents an upper-body or full-body rectangle.
	UpperBodyOnly() bool

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNHumanObservation class.

Inspecting the Observation ¶

• [IVNHumanObservation.UpperBodyOnly]: A Boolean value that indicates whether the observation represents an upper-body or full-body rectangle.

See: https://developer.apple.com/documentation/Vision/VNHumanObservation

type IVNImageAestheticsScoresObservation ¶

type IVNImageAestheticsScoresObservation interface {
	IVNObservation

	// A score which incorporates aesthetic score, failure score, and utility labels.
	OverallScore() float32
	// A Boolean value that represents images that are not necessarily of poor image quality, but may not have memorable or exciting content.
	IsUtility() bool

	// The results of the aesthetics request.
	Results() IVNImageAestheticsScoresObservation
	SetResults(value IVNImageAestheticsScoresObservation)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNImageAestheticsScoresObservation class.

Parsing Observation Content ¶

• [IVNImageAestheticsScoresObservation.OverallScore]: A score which incorporates aesthetic score, failure score, and utility labels.
• [IVNImageAestheticsScoresObservation.IsUtility]: A Boolean value that represents images that are not necessarily of poor image quality, but may not have memorable or exciting content.

See: https://developer.apple.com/documentation/Vision/VNImageAestheticsScoresObservation

type IVNImageAlignmentObservation ¶

type IVNImageAlignmentObservation interface {
	IVNObservation

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNImageAlignmentObservation class.

See: https://developer.apple.com/documentation/Vision/VNImageAlignmentObservation

type IVNImageBasedRequest ¶

type IVNImageBasedRequest interface {
	IVNRequest

	// The region of the image in which Vision will perform the request.
	RegionOfInterest() corefoundation.CGRect
	SetRegionOfInterest(value corefoundation.CGRect)
}

An interface definition for the VNImageBasedRequest class.

Configuring a Request ¶

• [IVNImageBasedRequest.RegionOfInterest]: The region of the image in which Vision will perform the request.
• [IVNImageBasedRequest.SetRegionOfInterest]

See: https://developer.apple.com/documentation/Vision/VNImageBasedRequest

type IVNImageHomographicAlignmentObservation ¶

type IVNImageHomographicAlignmentObservation interface {
	IVNImageAlignmentObservation

	// The warp transform matrix to morph the floating image into the reference image.
	WarpTransform() objectivec.IObject

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNImageHomographicAlignmentObservation class.

Accessing the Transform ¶

• [IVNImageHomographicAlignmentObservation.WarpTransform]: The warp transform matrix to morph the floating image into the reference image.

See: https://developer.apple.com/documentation/Vision/VNImageHomographicAlignmentObservation

type IVNImageRegistrationRequest ¶

type IVNImageRegistrationRequest interface {
	IVNTargetedImageRequest
}

An interface definition for the VNImageRegistrationRequest class.

See: https://developer.apple.com/documentation/Vision/VNImageRegistrationRequest

type IVNImageRequestHandler ¶

type IVNImageRequestHandler interface {
	objectivec.IObject

	// Creates a handler to be used for performing requests on Core Graphics images.
	InitWithCGImageOptions(image coregraphics.CGImageRef, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to be used for performing requests on a Core Graphics image with known orientation.
	InitWithCGImageOrientationOptions(image coregraphics.CGImageRef, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to use for performing requests on Core Image image data.
	InitWithCIImageOptions(image objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to be used for performing requests on Core Image image data of a known orientation.
	InitWithCIImageOrientationOptions(image objectivec.IObject, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler for performing requests on a Core Video pixel buffer.
	InitWithCVPixelBufferOptions(pixelBuffer corevideo.CVImageBufferRef, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler for performing requests on a Core Video pixel buffer of a known orientation.
	InitWithCVPixelBufferOrientationOptions(pixelBuffer corevideo.CVImageBufferRef, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	InitWithCVPixelBufferDepthDataOrientationOptions(pixelBuffer corevideo.CVImageBufferRef, depthData objectivec.IObject, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a request handler that performs requests on an image contained within a sample buffer.
	InitWithCMSampleBufferOptions(sampleBuffer objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a request handler that performs requests on an image of a specified orientation contained within a sample buffer.
	InitWithCMSampleBufferOrientationOptions(sampleBuffer objectivec.IObject, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a request handler that performs requests on an image in a sample buffer that contains depth data.
	InitWithCMSampleBufferDepthDataOrientationOptions(sampleBuffer objectivec.IObject, depthData objectivec.IObject, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to use for performing requests on an image in a data object.
	InitWithDataOptions(imageData foundation.INSData, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to use for performing requests on an image of known orientation.
	InitWithDataOrientationOptions(imageData foundation.INSData, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to be used for performing requests on an image at the specified URL.
	InitWithURLOptions(imageURL foundation.INSURL, options foundation.INSDictionary) VNImageRequestHandler
	// Creates a handler to be used for performing requests on an image with known orientation, at the specified URL.
	InitWithURLOrientationOptions(imageURL foundation.INSURL, orientation objectivec.IObject, options foundation.INSDictionary) VNImageRequestHandler

	// Schedules Vision requests to perform.
	PerformRequestsError(requests []VNRequest) (bool, error)
}

An interface definition for the VNImageRequestHandler class.

Creating a Request Handler ¶

• [IVNImageRequestHandler.InitWithCGImageOptions]: Creates a handler to be used for performing requests on Core Graphics images.
• [IVNImageRequestHandler.InitWithCGImageOrientationOptions]: Creates a handler to be used for performing requests on a Core Graphics image with known orientation.
• [IVNImageRequestHandler.InitWithCIImageOptions]: Creates a handler to use for performing requests on Core Image image data.
• [IVNImageRequestHandler.InitWithCIImageOrientationOptions]: Creates a handler to be used for performing requests on Core Image image data of a known orientation.
• [IVNImageRequestHandler.InitWithCVPixelBufferOptions]: Creates a handler for performing requests on a Core Video pixel buffer.
• [IVNImageRequestHandler.InitWithCVPixelBufferOrientationOptions]: Creates a handler for performing requests on a Core Video pixel buffer of a known orientation.
• [IVNImageRequestHandler.InitWithCVPixelBufferDepthDataOrientationOptions]
• [IVNImageRequestHandler.InitWithCMSampleBufferOptions]: Creates a request handler that performs requests on an image contained within a sample buffer.
• [IVNImageRequestHandler.InitWithCMSampleBufferOrientationOptions]: Creates a request handler that performs requests on an image of a specified orientation contained within a sample buffer.
• [IVNImageRequestHandler.InitWithCMSampleBufferDepthDataOrientationOptions]: Creates a request handler that performs requests on an image in a sample buffer that contains depth data.
• [IVNImageRequestHandler.InitWithDataOptions]: Creates a handler to use for performing requests on an image in a data object.
• [IVNImageRequestHandler.InitWithDataOrientationOptions]: Creates a handler to use for performing requests on an image of known orientation.
• [IVNImageRequestHandler.InitWithURLOptions]: Creates a handler to be used for performing requests on an image at the specified URL.
• [IVNImageRequestHandler.InitWithURLOrientationOptions]: Creates a handler to be used for performing requests on an image with known orientation, at the specified URL.

Executing a Request Handler ¶

• [IVNImageRequestHandler.PerformRequestsError]: Schedules Vision requests to perform.

See: https://developer.apple.com/documentation/Vision/VNImageRequestHandler

type IVNImageTranslationAlignmentObservation ¶

type IVNImageTranslationAlignmentObservation interface {
	IVNImageAlignmentObservation

	// The alignment transform to align the floating image with the reference image.
	AlignmentTransform() corefoundation.CGAffineTransform

	// A constant for specifying revision 1 of the translational image registration request.
	VNTranslationalImageRegistrationRequestRevision1() int

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNImageTranslationAlignmentObservation class.

Determining Alignment ¶

• [IVNImageTranslationAlignmentObservation.AlignmentTransform]: The alignment transform to align the floating image with the reference image.

Identifying Request Revisions ¶

• [IVNImageTranslationAlignmentObservation.VNTranslationalImageRegistrationRequestRevision1]: A constant for specifying revision 1 of the translational image registration request.

See: https://developer.apple.com/documentation/Vision/VNImageTranslationAlignmentObservation

type IVNInstanceMaskObservation ¶

type IVNInstanceMaskObservation interface {
	IVNObservation

	// The collection that contains all instances, excluding the background.
	AllInstances() foundation.NSIndexSet
	// The resulting mask that represents all instances.
	InstanceMask() corevideo.CVImageBufferRef

	// Creates a low-resolution mask from the instances you specify.
	GenerateMaskForInstancesError(instances foundation.NSIndexSet) (corevideo.CVImageBufferRef, error)
	// Creates a high-resolution image where everything becomes transparent black, except for the instances you specify.
	GenerateMaskedImageOfInstancesFromRequestHandlerCroppedToInstancesExtentError(instances foundation.NSIndexSet, requestHandler IVNImageRequestHandler, cropResult bool) (corevideo.CVImageBufferRef, error)
	// Creates a high-resolution mask where everything becomes transparent black, except for the instances you specify.
	GenerateScaledMaskForImageForInstancesFromRequestHandlerError(instances foundation.NSIndexSet, requestHandler IVNImageRequestHandler) (corevideo.CVImageBufferRef, error)

	// A constant for specifying the first revision of the foreground instance mask request.
	VNGenerateForegroundInstanceMaskRequestRevision1() int
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNInstanceMaskObservation class.

Accessing Instances ¶

• [IVNInstanceMaskObservation.AllInstances]: The collection that contains all instances, excluding the background.
• [IVNInstanceMaskObservation.InstanceMask]: The resulting mask that represents all instances.

Creating a Mask ¶

• [IVNInstanceMaskObservation.GenerateMaskForInstancesError]: Creates a low-resolution mask from the instances you specify.
• [IVNInstanceMaskObservation.GenerateMaskedImageOfInstancesFromRequestHandlerCroppedToInstancesExtentError]: Creates a high-resolution image where everything becomes transparent black, except for the instances you specify.
• [IVNInstanceMaskObservation.GenerateScaledMaskForImageForInstancesFromRequestHandlerError]: Creates a high-resolution mask where everything becomes transparent black, except for the instances you specify.

See: https://developer.apple.com/documentation/Vision/VNInstanceMaskObservation

type IVNObservation ¶

type IVNObservation interface {
	objectivec.IObject
	VNRequestRevisionProviding

	// A unique identifier assigned to the Vision observation.
	Uuid() foundation.NSUUID

	// The time range of the reported observation.
	TimeRange() objectivec.IObject
	// The level of confidence in the observation’s accuracy.
	Confidence() VNConfidence

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNObservation class.

Tracking Observations ¶

• [IVNObservation.Uuid]: A unique identifier assigned to the Vision observation.

Evaluating Observations ¶

• [IVNObservation.TimeRange]: The time range of the reported observation.
• [IVNObservation.Confidence]: The level of confidence in the observation’s accuracy.

See: https://developer.apple.com/documentation/Vision/VNObservation

type IVNPixelBufferObservation ¶

type IVNPixelBufferObservation interface {
	IVNObservation

	// The image that results from a request with image output.
	PixelBuffer() corevideo.CVImageBufferRef
	// A feature name that the CoreML model defines.
	FeatureName() string

	// Model information you use at runtime during development, which Xcode also displays in its Core ML model editor view.
	ModelDescription() coreml.MLModelDescription
	SetModelDescription(value coreml.MLModelDescription)
	// A dictionary of output feature descriptions, which the model keys by the output’s name.
	OutputDescriptionsByName() coreml.MLFeatureDescription
	SetOutputDescriptionsByName(value coreml.MLFeatureDescription)
	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNPixelBufferObservation class.

Parsing Observation Content ¶

• [IVNPixelBufferObservation.PixelBuffer]: The image that results from a request with image output.
• [IVNPixelBufferObservation.FeatureName]: A feature name that the CoreML model defines.

See: https://developer.apple.com/documentation/Vision/VNPixelBufferObservation

type IVNPoint ¶

type IVNPoint interface {
	objectivec.IObject

	// Creates a point object with the specified coordinates.
	InitWithXY(x float64, y float64) VNPoint
	// Creates a point object from the specified Core Graphics point.
	InitWithLocation(location corefoundation.CGPoint) VNPoint

	// The x-coordinate.
	X() float64
	// The y-coordinate.
	Y() float64
	// The Core Graphics point for this point.
	Location() corefoundation.CGPoint

	// Returns the distance to another point.
	DistanceToPoint(point IVNPoint) float64

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNPoint class.

Creating a Point ¶

• [IVNPoint.InitWithXY]: Creates a point object with the specified coordinates.
• [IVNPoint.InitWithLocation]: Creates a point object from the specified Core Graphics point.

Inspecting a Point ¶

• [IVNPoint.X]: The x-coordinate.
• [IVNPoint.Y]: The y-coordinate.
• [IVNPoint.Location]: The Core Graphics point for this point.

Calculating Distance ¶

• [IVNPoint.DistanceToPoint]: Returns the distance to another point.

See: https://developer.apple.com/documentation/Vision/VNPoint

type IVNPoint3D ¶

type IVNPoint3D interface {
	objectivec.IObject

	// Creates a point object with the position you specify.
	InitWithPosition(position objectivec.IObject) VNPoint3D

	// The three-dimensional position.
	Position() objectivec.IObject

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNPoint3D class.

Creating a Point ¶

• [IVNPoint3D.InitWithPosition]: Creates a point object with the position you specify.

Getting the Position ¶

• [IVNPoint3D.Position]: The three-dimensional position.

See: https://developer.apple.com/documentation/Vision/VNPoint3D

type IVNRecognizeAnimalsRequest ¶

type IVNRecognizeAnimalsRequest interface {
	IVNImageBasedRequest

	// Returns the identifiers of the animals that the request detects.
	SupportedIdentifiersAndReturnError() ([]string, error)

	// A constant for specifying revision 2 of the animal recognition request.
	VNRecognizeAnimalsRequestRevision2() int
	// A constant for specifying revision 1 of the animal recognition request.
	VNRecognizeAnimalsRequestRevision1() int
}

An interface definition for the VNRecognizeAnimalsRequest class.

Identifying Animals ¶

• [IVNRecognizeAnimalsRequest.SupportedIdentifiersAndReturnError]: Returns the identifiers of the animals that the request detects.

Identifying Request Revisions ¶

• [IVNRecognizeAnimalsRequest.VNRecognizeAnimalsRequestRevision2]: A constant for specifying revision 2 of the animal recognition request.
• [IVNRecognizeAnimalsRequest.VNRecognizeAnimalsRequestRevision1]: A constant for specifying revision 1 of the animal recognition request.

See: https://developer.apple.com/documentation/Vision/VNRecognizeAnimalsRequest

type IVNRecognizeTextRequest ¶

type IVNRecognizeTextRequest interface {
	IVNImageBasedRequest
	VNRequestProgressProviding

	// The minimum height, relative to the image height, of the text to recognize.
	MinimumTextHeight() float32
	SetMinimumTextHeight(value float32)
	// A value that determines whether the request prioritizes accuracy or speed in text recognition.
	RecognitionLevel() VNRequestTextRecognitionLevel
	SetRecognitionLevel(value VNRequestTextRecognitionLevel)

	// A Boolean value that indicates whether to attempt detecting the language to use the appropriate model for recognition and language correction.
	AutomaticallyDetectsLanguage() bool
	SetAutomaticallyDetectsLanguage(value bool)
	// An array of languages to detect, in priority order.
	RecognitionLanguages() []string
	SetRecognitionLanguages(value []string)
	// A Boolean value that indicates whether the request applies language correction during the recognition process.
	UsesLanguageCorrection() bool
	SetUsesLanguageCorrection(value bool)
	// An array of strings to supplement the recognized languages at the word-recognition stage.
	CustomWords() []string
	SetCustomWords(value []string)
	// Returns the identifiers of the languages that the request supports.
	SupportedRecognitionLanguagesAndReturnError() ([]string, error)

	// A constant for specifying revision 3 of the text recognition request.
	VNRecognizeTextRequestRevision3() int
	// A constant for specifying revision 2 of the text recognition request.
	VNRecognizeTextRequestRevision2() int
	// A constant for specifying revision 1 of the text recognition request.
	VNRecognizeTextRequestRevision1() int
}

An interface definition for the VNRecognizeTextRequest class.

Customizing Recognition Constraints ¶

• [IVNRecognizeTextRequest.MinimumTextHeight]: The minimum height, relative to the image height, of the text to recognize.
• [IVNRecognizeTextRequest.SetMinimumTextHeight]
• [IVNRecognizeTextRequest.RecognitionLevel]: A value that determines whether the request prioritizes accuracy or speed in text recognition.
• [IVNRecognizeTextRequest.SetRecognitionLevel]

Specifying the Language ¶

• [IVNRecognizeTextRequest.AutomaticallyDetectsLanguage]: A Boolean value that indicates whether to attempt detecting the language to use the appropriate model for recognition and language correction.
• [IVNRecognizeTextRequest.SetAutomaticallyDetectsLanguage]
• [IVNRecognizeTextRequest.RecognitionLanguages]: An array of languages to detect, in priority order.
• [IVNRecognizeTextRequest.SetRecognitionLanguages]
• [IVNRecognizeTextRequest.UsesLanguageCorrection]: A Boolean value that indicates whether the request applies language correction during the recognition process.
• [IVNRecognizeTextRequest.SetUsesLanguageCorrection]
• [IVNRecognizeTextRequest.CustomWords]: An array of strings to supplement the recognized languages at the word-recognition stage.
• [IVNRecognizeTextRequest.SetCustomWords]
• [IVNRecognizeTextRequest.SupportedRecognitionLanguagesAndReturnError]: Returns the identifiers of the languages that the request supports.

Identifying Request Revisions ¶

• [IVNRecognizeTextRequest.VNRecognizeTextRequestRevision3]: A constant for specifying revision 3 of the text recognition request.
• [IVNRecognizeTextRequest.VNRecognizeTextRequestRevision2]: A constant for specifying revision 2 of the text recognition request.
• [IVNRecognizeTextRequest.VNRecognizeTextRequestRevision1]: A constant for specifying revision 1 of the text recognition request.

See: https://developer.apple.com/documentation/Vision/VNRecognizeTextRequest

type IVNRecognizedObjectObservation ¶

type IVNRecognizedObjectObservation interface {
	IVNDetectedObjectObservation

	// An array of observations that classify the recognized object.
	Labels() []VNClassificationObservation

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNRecognizedObjectObservation class.

Classifying a Recognized Object ¶

• [IVNRecognizedObjectObservation.Labels]: An array of observations that classify the recognized object.

See: https://developer.apple.com/documentation/Vision/VNRecognizedObjectObservation

type IVNRecognizedPoint ¶

type IVNRecognizedPoint interface {
	IVNDetectedPoint

	// The point’s identifier label.
	Identifier() VNRecognizedPointKey

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNRecognizedPoint class.

Inspecting a Point ¶

• [IVNRecognizedPoint.Identifier]: The point’s identifier label.

See: https://developer.apple.com/documentation/Vision/VNRecognizedPoint

type IVNRecognizedPoint3D ¶

type IVNRecognizedPoint3D interface {
	IVNPoint3D

	// The identifier that provides context about what kind of point the request recognizes.
	Identifier() VNRecognizedPointKey

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNRecognizedPoint3D class.

Getting the Identifier ¶

• [IVNRecognizedPoint3D.Identifier]: The identifier that provides context about what kind of point the request recognizes.

See: https://developer.apple.com/documentation/Vision/VNRecognizedPoint3D

type IVNRecognizedPoints3DObservation ¶

type IVNRecognizedPoints3DObservation interface {
	IVNObservation

	// The available point keys in the observation.
	AvailableKeys() []string
	// The available point group keys in the observation.
	AvailableGroupKeys() []string
	// Returns a point for a key you specify.
	RecognizedPointForKeyError(pointKey VNRecognizedPointKey) (IVNRecognizedPoint3D, error)
	// Returns a point for a group key you specify.
	RecognizedPointsForGroupKeyError(groupKey VNRecognizedPointGroupKey) (foundation.INSDictionary, error)

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNRecognizedPoints3DObservation class.

Inspecting the Observation ¶

• [IVNRecognizedPoints3DObservation.AvailableKeys]: The available point keys in the observation.
• [IVNRecognizedPoints3DObservation.AvailableGroupKeys]: The available point group keys in the observation.
• [IVNRecognizedPoints3DObservation.RecognizedPointForKeyError]: Returns a point for a key you specify.
• [IVNRecognizedPoints3DObservation.RecognizedPointsForGroupKeyError]: Returns a point for a group key you specify.

See: https://developer.apple.com/documentation/Vision/VNRecognizedPoints3DObservation

type IVNRecognizedPointsObservation ¶

type IVNRecognizedPointsObservation interface {
	IVNObservation

	// The available point keys in the observation.
	AvailableKeys() []string
	// The available point group keys in the observation.
	AvailableGroupKeys() []string
	// Retrieves a recognized point for a key.
	RecognizedPointForKeyError(pointKey VNRecognizedPointKey) (IVNRecognizedPoint, error)
	// Retrieves the recognized points for a key.
	RecognizedPointsForGroupKeyError(groupKey VNRecognizedPointGroupKey) (foundation.INSDictionary, error)

	// Retrieves the grouping of normalized point coordinates and confidence scores in a format compatible with Core ML.
	KeypointsMultiArrayAndReturnError() (coreml.MLMultiArray, error)

	EncodeWithCoder(coder foundation.INSCoder)
}

An interface definition for the VNRecognizedPointsObservation class.

Inspecting the Observation ¶

• [IVNRecognizedPointsObservation.AvailableKeys]: The available point keys in the observation.
• [IVNRecognizedPointsObservation.AvailableGroupKeys]: The available point group keys in the observation.
• [IVNRecognizedPointsObservation.RecognizedPointForKeyError]: Retrieves a recognized point for a key.
• [IVNRecognizedPointsObservation.RecognizedPointsForGroupKeyError]: Retrieves the recognized points for a key.

Converting Points for Core ML ¶

• [IVNRecognizedPointsObservation.KeypointsMultiArrayAndReturnError]: Retrieves the grouping of normalized point coordinates and confidence scores in a format compatible with Core ML.

See: https://developer.apple.com/documentation/Vision/VNRecognizedPointsObservation

type IVNRecognizedText ¶

type IVNRecognizedText interface {
	objectivec.IObject
	VNRequestRevisionProviding

	// The top candidate for recognized text.
	String() string
	// A normalized confidence score for the text recognition result.
	Confidence() VNConfidence

	// Calculates the bounding box around the characters in the range of a string.
	BoundingBoxForRangeError(range_ foundation.NSRange) (IVNRectangleObservation, error)
	EncodeWithCoder(coder foundation.INSCoder)
}