| Package | Description | 
|---|---|
| javax.imageio | 
 The main package of the Java Image I/O API. 
 | 
| javax.imageio.plugins.jpeg | 
 Classes supporting the built-in JPEG plug-in. 
 | 
| Modifier and Type | Method and Description | 
|---|---|
ImageReadParam | 
ImageReader.getDefaultReadParam()
Returns a default  
ImageReadParam object
 appropriate for this format. | 
| Modifier and Type | Method and Description | 
|---|---|
protected static void | 
ImageReader.checkReadParamBandSettings(ImageReadParam param,
                          int numSrcBands,
                          int numDstBands)
A utility method that may be used by readers to test the
 validity of the source and destination band settings of an
  
ImageReadParam. | 
protected static void | 
ImageReader.computeRegions(ImageReadParam param,
              int srcWidth,
              int srcHeight,
              BufferedImage image,
              Rectangle srcRegion,
              Rectangle destRegion)
Computes the source region of interest and the destination
 region of interest, taking the width and height of the source
 image, an optional destination image, and an optional
  
ImageReadParam into account. | 
protected static BufferedImage | 
ImageReader.getDestination(ImageReadParam param,
              Iterator<ImageTypeSpecifier> imageTypes,
              int width,
              int height)
Returns the  
BufferedImage to which decoded pixel
 data should be written. | 
protected static Rectangle | 
ImageReader.getSourceRegion(ImageReadParam param,
               int srcWidth,
               int srcHeight)
A utility method that may be used by readers to compute the
 region of the source image that should be read, taking into
 account any source region and subsampling offset settings in
 the supplied  
ImageReadParam. | 
abstract BufferedImage | 
ImageReader.read(int imageIndex,
    ImageReadParam param)
Reads the image indexed by  
imageIndex and returns
 it as a complete BufferedImage, using a supplied
 ImageReadParam. | 
IIOImage | 
ImageReader.readAll(int imageIndex,
       ImageReadParam param)
Reads the image indexed by  
imageIndex and returns
 an IIOImage containing the image, thumbnails, and
 associated image metadata, using a supplied
 ImageReadParam. | 
RenderedImage | 
ImageReader.readAsRenderedImage(int imageIndex,
                   ImageReadParam param)
Returns a  
RenderedImage object that contains the
 contents of the image indexed by imageIndex. | 
Raster | 
ImageReader.readRaster(int imageIndex,
          ImageReadParam param)
Returns a new  
Raster object containing the raw pixel data
 from the image stream, without any color conversion applied. | 
| Modifier and Type | Method and Description | 
|---|---|
Iterator<IIOImage> | 
ImageReader.readAll(Iterator<? extends ImageReadParam> params)
Returns an  
Iterator containing all the images,
 thumbnails, and metadata, starting at the index given by
 getMinIndex, from the input source in the form of
 IIOImage objects. | 
| Modifier and Type | Class and Description | 
|---|---|
class  | 
JPEGImageReadParam
This class adds the ability to set JPEG quantization and Huffman
 tables when using the built-in JPEG reader plug-in. 
 | 
 Submit a bug or feature 
For further API reference and developer documentation, see Java SE Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
 Copyright © 1993, 2015, Oracle and/or its affiliates.  All rights reserved.