The highest tagged major version is v2.

dog

package

v1.1.0 Latest Latest Go to latest Published: Jul 12, 2020 License: BSD-3-Clause Imports: 3 Imported by: 4

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Redistributable license
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Repository

github.com/emer/vision

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Documentation ¶

Overview ¶

package dog provides the Difference-of-Gaussians (DoG) filter for visual and other forms of signal processing

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

func GaussDenSig ¶

func GaussDenSig(x, sig float32) float32

GaussDenSig returns gaussian density for given value and sigma

Types ¶

type Filter ¶

type Filter struct {
	On         bool    `desc:"is this filter active?"`
	Wt         float32 `viewif:"On" desc:"how much relative weight does this filter have when combined with other filters"`
	Gain       float32 `` /* 163-byte string literal not displayed */
	OnGain     float32 `viewif:"On" def:"1" desc:"gain for the on component of filter, only relevant for color-opponent DoG's"`
	Size       int     `` /* 217-byte string literal not displayed */
	Spacing    int     `` /* 187-byte string literal not displayed */
	OnSig      float32 `viewif:"On" def:"0.125" desc:"gaussian sigma for the narrower On gaussian, in normalized units relative to Size"`
	OffSig     float32 `viewif:"On" def:"0.25" desc:"gaussian sigma for the wider Off gaussian, in normalized units relative to Size"`
	CircleEdge bool    `` /* 138-byte string literal not displayed */
}

dog.Filter specifies a DoG Difference of Gaussians filter function.

func (*Filter) Defaults ¶

func (gf *Filter) Defaults()

func (*Filter) FilterTensor ¶

func (gf *Filter) FilterTensor(tsr *etensor.Float32, filt Filters) *etensor.Float32

FilterTensor extracts the given filter subspace from set of 3 filters in input tensor 0 = On, 1 = Off, 2 = Net

func (*Filter) SetSize ¶

func (gf *Filter) SetSize(sz, spc int)

SetSize sets the size and spacing -- these are the main params that need to be varied for standard V1 dogs.

func (*Filter) ToTable ¶

func (gf *Filter) ToTable(tab *etable.Table)

ToTable renders filters into the given etable.Table setting a column named Version and a column named Filter to the filter for that version (on, off, net) This is useful for display and validation purposes.

func (*Filter) ToTensor ¶

func (gf *Filter) ToTensor(tsr *etensor.Float32)

ToTensor renders dog filters into the given etable etensor.Tensor, setting dimensions to [3][Y][X] where Y = X = Size, and first one is On-filter, second is Off-filter, and third is Net On - Off

func (*Filter) Update ¶

func (gf *Filter) Update()

type Filters ¶

type Filters int

Filters is the type of filter

const (
	On Filters = iota
	Off
	Net
	FiltersN
)

Source Files ¶

View all Source files

dog.go

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