hocr

package

v0.7.2 Latest Latest Go to latest Published: Nov 21, 2018 License: MIT Imports: 6 Imported by: 1

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const (
	ClassPage = "ocr_page"
	ClassArea = "ocr_carea"
	ClassLine = "ocr_line"
	ClassWord = "ocrx_word"
)

Possible classes for elements

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var ErrNotFound = errors.New("not found")

ErrNotFound is the error that is returned if a attribute of an element could not found.

This section is empty.

type Element struct {
	Class string
	Node  xml.StartElement
}

Element is used to represent text elements in the hOCR document.

func (e Element) BBox() image.Rectangle

BBox returns the bounding box of the element. If the element does not have a bounding box, the empty boundingbox (0,0)-(0,0) is returned.

func (e Element) Scanf(attr, key, format string, args ...interface{}) (int, error)

Scanf is used to read values of the different element attributes. Use like this: e.Scanf("title", "image", "%s", &str)

type Node interface{}

Node represents hOCR nodes returned by the scanner.

type Scanner struct {
	// contains filtered or unexported fields
}

Scanner is a low-level scanner for hOCR documents.

func NewScanner(r io.Reader) *Scanner

NewScanner creates a new hocr.Scanner

func (s *Scanner) Err() error

Err returns the last error.

func (s *Scanner) Node() Node

Node returns the last scanned node.

func (s *Scanner) Scan() bool

Scan scans the next element in the document. It returns true if a new element could be read.

type Text string

Text is just a typedef for a string.