net.sourceforge.tess4j

Interface ITesseract

All Known Implementing Classes:

Tesseract, Tesseract1

public interface ITesseract

An interface represents common OCR methods.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ITesseract.RenderedFormat Rendered formats supported by Tesseract.

Field Summary

Fields

Modifier and Type	Field and Description
static String	htmlBeginTag
static String	htmlEndTag

Method Summary

Modifier and Type	Method and Description
void	createDocuments(String[] filenames, String[] outputbases, List<ITesseract.RenderedFormat> formats) Creates documents for given renderers.
void	createDocuments(String filename, String outputbase, List<ITesseract.RenderedFormat> formats) Creates documents for given renderers.
String	doOCR(BufferedImage bi) Performs OCR operation.
String	doOCR(BufferedImage bi, Rectangle rect) Performs OCR operation.
String	doOCR(File imageFile) Performs OCR operation.
String	doOCR(File imageFile, Rectangle rect) Performs OCR operation.
String	doOCR(int xsize, int ysize, ByteBuffer buf, Rectangle rect, int bpp) Performs OCR operation.
String	doOCR(int xsize, int ysize, ByteBuffer buf, String filename, Rectangle rect, int bpp) Performs OCR operation.
String	doOCR(List<IIOImage> imageList, Rectangle rect) Performs OCR operation.
String	doOCR(List<IIOImage> imageList, String filename, Rectangle rect) Performs OCR operation.
List<Rectangle>	getSegmentedRegions(BufferedImage bi, int pageIteratorLevel) Gets segmented regions at specified page iterator level.
List<Word>	getWords(BufferedImage bi, int pageIteratorLevel) Gets recognized words at specified page iterator level.
void	setConfigs(List<String> configs) Sets configs to be passed to Tesseract's Init method.
void	setDatapath(String datapath) Sets tessdata path.
void	setLanguage(String language) Sets language for OCR.
void	setOcrEngineMode(int ocrEngineMode) Sets OCR engine mode.
void	setPageSegMode(int mode) Sets page segmentation mode.
void	setTessVariable(String key, String value) Sets the value of Tesseract's internal parameter.

Field Detail

htmlBeginTag

static final String htmlBeginTag

See Also:

Constant Field Values

htmlEndTag

static final String htmlEndTag

See Also:

Constant Field Values

Method Detail

doOCR

String doOCR(File imageFile)
      throws TesseractException

Performs OCR operation.

Parameters:

imageFile - an image file

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(File imageFile,
             Rectangle rect)
      throws TesseractException

Performs OCR operation.

Parameters:

imageFile - an image file

rect - the bounding rectangle defines the region of the image to be recognized. A rectangle of zero dimension or null indicates the whole image.

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(BufferedImage bi)
      throws TesseractException

Performs OCR operation.

Parameters:

bi - a buffered image

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(BufferedImage bi,
             Rectangle rect)
      throws TesseractException

Performs OCR operation.

Parameters:

bi - a buffered image

rect - the bounding rectangle defines the region of the image to be recognized. A rectangle of zero dimension or null indicates the whole image.

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(List<IIOImage> imageList,
             Rectangle rect)
      throws TesseractException

Performs OCR operation.

Parameters:

imageList - a list of IIOImage objects

rect - the bounding rectangle defines the region of the image to be recognized. A rectangle of zero dimension or null indicates the whole image.

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(List<IIOImage> imageList,
             String filename,
             Rectangle rect)
      throws TesseractException

Performs OCR operation.

Parameters:

imageList - a list of IIOImage objects

filename - input file name. Needed only for training and reading a UNLV zone file.

rect - the bounding rectangle defines the region of the image to be recognized. A rectangle of zero dimension or null indicates the whole image.

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(int xsize,
             int ysize,
             ByteBuffer buf,
             Rectangle rect,
             int bpp)
      throws TesseractException

Performs OCR operation. Use SetImage, (optionally) SetRectangle, and one or more of the Get*Text functions.

Parameters:

xsize - width of image

ysize - height of image

buf - pixel data

rect - the bounding rectangle defines the region of the image to be recognized. A rectangle of zero dimension or null indicates the whole image.

bpp - bits per pixel, represents the bit depth of the image, with 1 for binary bitmap, 8 for gray, and 24 for color RGB.

Returns:

the recognized text

Throws:

TesseractException

doOCR

String doOCR(int xsize,
             int ysize,
             ByteBuffer buf,
             String filename,
             Rectangle rect,
             int bpp)
      throws TesseractException

Performs OCR operation. Use SetImage, (optionally) SetRectangle, and one or more of the Get*Text functions.

Parameters:

xsize - width of image

ysize - height of image

buf - pixel data

filename - input file name. Needed only for training and reading a UNLV zone file.

rect - the bounding rectangle defines the region of the image to be recognized. A rectangle of zero dimension or null indicates the whole image.

bpp - bits per pixel, represents the bit depth of the image, with 1 for binary bitmap, 8 for gray, and 24 for color RGB.

Returns:

the recognized text

Throws:

TesseractException

setDatapath

void setDatapath(String datapath)

Sets tessdata path.

Parameters:

datapath - the tessdata path to set

setLanguage

void setLanguage(String language)

Sets language for OCR.

Parameters:

language - the language code, which follows ISO 639-3 standard.

setOcrEngineMode

void setOcrEngineMode(int ocrEngineMode)

Sets OCR engine mode.

Parameters:

ocrEngineMode - the OcrEngineMode to set

setPageSegMode

void setPageSegMode(int mode)

Sets page segmentation mode.

Parameters:

mode - the page segmentation mode to set

setTessVariable

void setTessVariable(String key,
                     String value)

Sets the value of Tesseract's internal parameter.

Parameters:

key - variable name, e.g., tessedit_create_hocr, tessedit_char_whitelist, etc.

value - value for corresponding variable, e.g., "1", "0", "0123456789", etc.

setConfigs

void setConfigs(List<String> configs)

Sets configs to be passed to Tesseract's Init method.

Parameters:

configs - list of config filenames, e.g., "digits", "bazaar", "quiet"

createDocuments

void createDocuments(String filename,
                     String outputbase,
                     List<ITesseract.RenderedFormat> formats)
              throws TesseractException

Creates documents for given renderers.

Parameters:

filename - input image

outputbase - output filename without extension

formats - types of renderers

Throws:

TesseractException

createDocuments

void createDocuments(String[] filenames,
                     String[] outputbases,
                     List<ITesseract.RenderedFormat> formats)
              throws TesseractException

Creates documents for given renderers.

Parameters:

filenames - array of input files

outputbases - array of output filenames without extension

formats - types of renderers

Throws:

TesseractException

getSegmentedRegions

List<Rectangle> getSegmentedRegions(BufferedImage bi,
                                    int pageIteratorLevel)
                             throws TesseractException

Gets segmented regions at specified page iterator level.

Parameters:

bi - input image

pageIteratorLevel - TessPageIteratorLevel enum

Returns:

list of Rectangle

Throws:

TesseractException

getWords

List<Word> getWords(BufferedImage bi,
                    int pageIteratorLevel)

Gets recognized words at specified page iterator level.

Parameters:

bi - input image

pageIteratorLevel - TessPageIteratorLevel enum

Returns:

list of Word