org.safs.tools.ocr.tesseract

Interface TessdllWrapper

All Superinterfaces:

com.sun.jna.AltCallingConvention, com.sun.jna.Library, com.sun.jna.win32.StdCall, com.sun.jna.win32.StdCallLibrary

public interface TessdllWrapper
extends com.sun.jna.win32.StdCallLibrary

A JNA Library definition for the Windows tessdllWrapper.dll, which is used to call tessdll.dll to do OCR work. tessdllWrapper.dll: A SAFS defined dll as interface to Tesseract OCR engine, tessdll.dll. tessdll.dll: Implemented by tesseract http://code.google.com/p/tesseract-ocr/ It used to depend on msvcr90.dll and msjava.dll. But now it is re-generated in VS2008 by SAFS and can be used independently.

Author:

JunwuMa

See Also:


DEC 14, 2009 Original Release

Nested Class Summary

Nested classes/interfaces inherited from interface com.sun.jna.win32.StdCallLibrary

com.sun.jna.win32.StdCallLibrary.StdCallCallback

Nested classes/interfaces inherited from interface com.sun.jna.Library

com.sun.jna.Library.Handler

Field Summary

Fields

Modifier and Type	Field and Description
static TessdllWrapper	INSTANCE

Fields inherited from interface com.sun.jna.win32.StdCallLibrary

FUNCTION_MAPPER, STDCALL_CONVENTION

Fields inherited from interface com.sun.jna.Library

OPTION_ALLOW_OBJECTS, OPTION_CALLING_CONVENTION, OPTION_CLASSLOADER, OPTION_FUNCTION_MAPPER, OPTION_INVOCATION_MAPPER, OPTION_OPEN_FLAGS, OPTION_STRING_ENCODING, OPTION_STRUCTURE_ALIGNMENT, OPTION_TYPE_MAPPER

Method Summary

Modifier and Type	Method and Description
java.lang.String	ImageBufferToText(byte[] imageBuf, int width, int height, int bpp, java.lang.String langId, java.lang.String configs) Method in tessdllWrapper.dll for converting image data to text with supported language.
java.lang.String	ImageFileToText(java.lang.String imagefile, java.lang.String langId, java.lang.String configs) Method to convert an image file to text.

Field Detail

INSTANCE

static final TessdllWrapper INSTANCE

Method Detail

ImageBufferToText

java.lang.String ImageBufferToText(byte[] imageBuf,
                                   int width,
                                   int height,
                                   int bpp,
                                   java.lang.String langId,
                                   java.lang.String configs)

Method in tessdllWrapper.dll for converting image data to text with supported language.

Parameters:

imageBuf - image data in byte[] format, java.awt.image.BufferedImage can return this format. Note: The image in the imageBuf is supposed to fit 300DPI, which is required by tesseract-ocr. Images captured on screen normally are at low DPI like 72 or 96. Before using them, remember to resize these images to fit in.

width - image width in pixel

height - image height in pixel

bpp - bits per pixel

langId - language id indicating which language it intends to convert the image to "eng" for English --- done "chn" for Chinese --- todo "" for

configs - custom configure file [optional]

Returns:

text String that the input imageBuf is converted to

ImageFileToText

java.lang.String ImageFileToText(java.lang.String imagefile,
                                 java.lang.String langId,
                                 java.lang.String configs)

Method to convert an image file to text.

Parameters:

imagefile, - an image file. (only BMP and uncompressed TIF supported). It should be at 300DPI.

langId -

configs -

Returns: