Examples of com.sun.media.imageio.plugins.jpeg2000.J2KImageWriteParam

Package com.sun.media.imageio.plugins.jpeg2000

Examples of com.sun.media.imageio.plugins.jpeg2000.J2KImageWriteParam

com.sun.media.imageio.plugins.jpeg2000.J2KImageWriteParam

A subclass of ImageWriteParam for writing images in the JPEG 2000 format.

JPEG 2000 plugin supports to losslessly or lossy compress gray-scale, RGB, and RGBA images with byte, unsigned short or short data type. It also supports losslessly compress bilevel, and 8-bit color indexed images. The result data is in the of JP2 format -- JPEG 2000 Part 1 or baseline format.

The parameters for encoding JPEG 2000 are listed in the following table:

**JPEG 2000 Plugin Decoding Parameters**
Parameter Name	Description
numDecompositionLevels	The number of decomposition levels to generate. This value must be in the range `0 ≤ numDecompositionLevels ≤ 32` . The default value is `5`. Note that the number of resolution levels is `numDecompositionLevels + 1`. The number of decomposition levels is constant across all components and all tiles.
encodingRate	The bitrate in bits-per-pixel for encoding. Should be set when lossy compression scheme is used. With the default value `Double.MAX_VALUE`, a lossless compression will be done.
lossless	Indicates using the lossless scheme or not. It is equivalent to use reversible quantization and 5x3 integer wavelet filters. The default is `true`.
componentTransformation	Specifies to utilize the component transformation on some tiles. If the wavelet transform is reversible (w5x3 filter), the Reversible Component Transformation (RCT) is applied. If not reversible (w9x7 filter), the Irreversible Component Transformation (ICT) is used.
filters	Specifies which wavelet filters to use for the specified tile-components. JPEG 2000 part I only supports w5x3 and w9x7 filters.
codeBlockSize	Specifies the maximum code-block size to use for tile-component. The maximum width and height is 1024, however the block size (i.e. width x height) must not exceed 4096. The minimum width and height is 4. The default values are (64, 64).
progressionType	Specifies which type of progression should be used when generating the codestream. The format is ont of the progression types defined below: res : Resolution-Layer-Component-Position layer: Layer-Resolution-Component-Position res-pos: Resolution-Position-Component-Layer pos-comp: Position-Component-Resolution-Layer comp-pos: Component-Position-Resolution-Layer
SOP	Specifies whether start of packet (SOP) markers should be used. true enables, false disables it. The default value is false.
EPH	Specifies whether end of packet header (EPH) markers should be used. true enables, false disables it. The default value is false.
writeCodeStreamOnly	Specifies whether write only the jpeg2000 code stream, i.e, no any box is written. The default value is false.

                             param.getSubsamplingXOffset(),
                             param.getSubsamplingYOffset());
        setDestinationType(param.getDestinationType());


        // J2K settings.
        J2KImageReadParam j2kParam;
        if(param instanceof J2KImageReadParam) {
            j2kParam = (J2KImageReadParam)param;
        } else {
            j2kParam = new J2KImageReadParam();
        }
        setDecodingRate(j2kParam.getDecodingRate());
        setResolution(j2kParam.getResolution());
    }

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        }
        return null;
    }


    public ImageReadParam getDefaultReadParam() {
        return new J2KImageReadParam();
    }

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                             param.getSourceYSubsampling(),
                             param.getSubsamplingXOffset(),
                             param.getSubsamplingYOffset());
        setDestinationType(param.getDestinationType());


        J2KImageWriteParam j2kParam;
        if(param instanceof J2KImageWriteParam) {
            j2kParam = (J2KImageWriteParam)param;
        } else {
            j2kParam = new J2KImageWriteParam();
        }


        setDecompositionLevel(""+j2kParam.getNumDecompositionLevels());
        setEncodingRate(j2kParam.getEncodingRate());
        setLossless(j2kParam.getLossless());
        setFilters(j2kParam.getFilter());
        setEPH("" + j2kParam.getEPH());
        setSOP("" + j2kParam.getSOP());
        setProgressionName(j2kParam.getProgressionType());
        int[] size = j2kParam.getCodeBlockSize();
        setCodeBlockSize("" + size[0] +" " + size[1]);
        enableCT = j2kParam.getComponentTransformation();
        setComponentTransformation("" + enableCT);
    }

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        } else
            this.stream = null;
    }


    public ImageWriteParam getDefaultWriteParam() {
        return new J2KImageWriteParam();
    }

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    BufferedImage bitmap = pngTransformation(((BitmapBufferedImageImpl)inputbitmap).getImage());
//    BufferedImage bitmap = ((BitmapBufferedImageImpl)inputbitmap).getImage();
    
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    J2KImageWriter writer = (J2KImageWriter) ImageIO.getImageWritersByFormatName("jpeg2000").next();
    J2KImageWriteParam iwp = (J2KImageWriteParam)writer.getDefaultWriteParam();
    
    iwp.setLossless(lossless);
////    //list of all types, only one seems to exist
//    String[] ct = iwp.getCompressionTypes();
//    for(int i=0;i < ct.length; i++)
//      System.out.println("compression type : "+ct[0]);
//    
    iwp.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
//    iwp.setCompressionType(ct[0]);
//    iwp.setCompressionQuality(0.01f);
////    iwp.setEncodingRate(0.01);
    //TODO Experiment
    iwp.setFilter(J2KImageWriteParam.FILTER_97);
    iwp.setProgressionType("layer");
    //Following is must to generate j2k JPEG 2000 stream
    iwp.setWriteCodeStreamOnly(true);
    
    iwp.setNumDecompositionLevels(5);
    FileCacheImageOutputStream fileImageOutputStream = new FileCacheImageOutputStream(baos, null); 
    writer.setOutput(fileImageOutputStream);


    //TODO changed
//    writer.write(null, new IIOImage(bitmap, null, null), iwp);

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