net.sourceforge.tess4j.util

Class ImageIOHelper

java.lang.Object

net.sourceforge.tess4j.util.ImageIOHelper

public class ImageIOHelper
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ImageIOHelper()

Method Summary

Modifier and Type	Method and Description
static java.nio.ByteBuffer	convertImageData(java.awt.image.BufferedImage bi) Converts BufferedImage to ByteBuffer.
static java.util.List<java.io.File>	createTiffFiles(java.io.File imageFile, int index) Creates a list of TIFF image files from an image file.
static java.util.List<java.io.File>	createTiffFiles(java.io.File imageFile, int index, boolean preserve) Creates a list of TIFF image files from an image file.
static java.util.List<java.io.File>	createTiffFiles(java.util.List<javax.imageio.IIOImage> imageList, int index) Creates a list of TIFF image files from a list of IIOImage objects.
static java.util.List<java.io.File>	createTiffFiles(java.util.List<javax.imageio.IIOImage> imageList, int index, int dpiX, int dpiY)
static java.util.List<javax.imageio.IIOImage>	getIIOImageList(java.awt.image.BufferedImage bi) Gets a list of IIOImage objects for a BufferedImage.
static java.util.List<javax.imageio.IIOImage>	getIIOImageList(java.io.File imageFile) Gets a list of IIOImage objects for an image file.
static java.nio.ByteBuffer	getImageByteBuffer(javax.imageio.IIOImage image) Gets pixel data of an IIOImage object.
static java.nio.ByteBuffer	getImageByteBuffer(java.awt.image.RenderedImage image) Gets pixel data of an RenderedImage object.
static void	mergeTiff(java.io.File[] inputImages, java.io.File outputTiff) Merges multiple images into one TIFF image.
static java.util.Map<java.lang.String,java.lang.String>	readImageData(javax.imageio.IIOImage oimage) Reads image meta data.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImageIOHelper

public ImageIOHelper()

Method Detail

createTiffFiles

public static java.util.List<java.io.File> createTiffFiles(java.io.File imageFile,
                                                           int index)
                                                    throws java.io.IOException

Creates a list of TIFF image files from an image file. It basically converts images of other formats to TIFF format, or a multi-page TIFF image to multiple TIFF image files.

Parameters:

imageFile - input image file

index - an index of the page; -1 means all pages, as in a multi-page TIFF image

Returns:

a list of TIFF image files

Throws:

java.io.IOException

createTiffFiles

public static java.util.List<java.io.File> createTiffFiles(java.io.File imageFile,
                                                           int index,
                                                           boolean preserve)
                                                    throws java.io.IOException

Creates a list of TIFF image files from an image file. It basically converts images of other formats to TIFF format, or a multi-page TIFF image to multiple TIFF image files.

Parameters:

imageFile - input image file

index - an index of the page; -1 means all pages, as in a multi-page TIFF image

preserve - preserve compression mode

Returns:

a list of TIFF image files

Throws:

java.io.IOException

createTiffFiles

public static java.util.List<java.io.File> createTiffFiles(java.util.List<javax.imageio.IIOImage> imageList,
                                                           int index)
                                                    throws java.io.IOException

Creates a list of TIFF image files from a list of IIOImage objects.

Parameters:

imageList - a list of IIOImage objects

index - an index of the page; -1 means all pages

Returns:

a list of TIFF image files

Throws:

java.io.IOException

createTiffFiles

public static java.util.List<java.io.File> createTiffFiles(java.util.List<javax.imageio.IIOImage> imageList,
                                                           int index,
                                                           int dpiX,
                                                           int dpiY)
                                                    throws java.io.IOException

Throws:

java.io.IOException

getImageByteBuffer

public static java.nio.ByteBuffer getImageByteBuffer(javax.imageio.IIOImage image)
                                              throws java.io.IOException

Gets pixel data of an IIOImage object.

Parameters:

image - an IIOImage object

Returns:

a byte buffer of pixel data

Throws:

java.io.IOException

getImageByteBuffer

public static java.nio.ByteBuffer getImageByteBuffer(java.awt.image.RenderedImage image)
                                              throws java.io.IOException

Gets pixel data of an RenderedImage object.

Parameters:

image - an RenderedImage object

Returns:

a byte buffer of pixel data

Throws:

java.io.IOException

convertImageData

public static java.nio.ByteBuffer convertImageData(java.awt.image.BufferedImage bi)

Converts BufferedImage to ByteBuffer.

Parameters:

bi - Input image

Returns:

pixel data

getIIOImageList

public static java.util.List<javax.imageio.IIOImage> getIIOImageList(java.io.File imageFile)
                                                              throws java.io.IOException

Gets a list of IIOImage objects for an image file.

Parameters:

imageFile - input image file. It can be any of the supported formats, including TIFF, JPEG, GIF, PNG, BMP, JPEG, and PDF if GPL Ghostscript is installed

Returns:

a list of IIOImage objects

Throws:

java.io.IOException

getIIOImageList

public static java.util.List<javax.imageio.IIOImage> getIIOImageList(java.awt.image.BufferedImage bi)
                                                              throws java.io.IOException

Gets a list of IIOImage objects for a BufferedImage.

Parameters:

bi - input image

Returns:

a list of IIOImage objects

Throws:

java.io.IOException

mergeTiff

public static void mergeTiff(java.io.File[] inputImages,
                             java.io.File outputTiff)
                      throws java.io.IOException

Merges multiple images into one TIFF image.

Parameters:

inputImages - an array of image files

outputTiff - the output TIFF file

Throws:

java.io.IOException

readImageData

public static java.util.Map<java.lang.String,java.lang.String> readImageData(javax.imageio.IIOImage oimage)

Reads image meta data.

Parameters:

oimage -

Returns:

a map of meta data