Examples of java.awt.color.ColorSpace

java.awt.color.ColorSpace

3.org/pub/WWW/Graphics/Color/sRGB.html"> http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html .

The purpose of the methods to transform to/from the well-defined CIEXYZ color space is to support conversions between any two color spaces at a reasonably high degree of accuracy. It is expected that particular implementations of subclasses of ColorSpace (e.g. ICC_ColorSpace) will support high performance conversion based on underlying platform color management systems.

The CS_CIEXYZ space used by the toCIEXYZ/fromCIEXYZ methods can be described as follows:

       CIEXYZ       viewing illuminance: 200 lux       viewing white point: CIE D50       media white point: "that of a perfectly reflecting diffuser" -- D50        media black point: 0 lux or 0 Reflectance       flare: 1 percent       surround: 20percent of the media white point       media description: reflection print (i.e., RLAB, Hunt viewing media)       note: For developers creating an ICC profile for this conversion             space, the following is applicable.  Use a simple Von Kries             white point adaptation folded into the 3X3 matrix parameters             and fold the flare and surround effects into the three             one-dimensional lookup tables (assuming one uses the minimal             model for monitors).

@see ICC_ColorSpace @version 10 Feb 1997

     * @param src The image to convert to sRGB.
     * @return    An equivilant image to <tt>src</tt> who's data is in sRGB.
     */
    public static CachableRed convertTosRGB(CachableRed src) {
        ColorModel cm = src.getColorModel();
        ColorSpace cs = cm.getColorSpace();
        if (cs == ColorSpace.getInstance(ColorSpace.CS_sRGB))
            return src;


        return new Any2sRGBRed(src);
    }

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                    numExtraSamples = numBands - 1;
                }
            }


        } else { // colorModel is non-null but not an IndexColorModel
            ColorSpace colorSpace = colorModel.getColorSpace();


            switch(colorSpace.getType()) {
            case ColorSpace.TYPE_CMYK:
                imageType = TIFF_CMYK;
                break;
            case ColorSpace.TYPE_GRAY:
                imageType = TIFF_GRAY;
                break;
            case ColorSpace.TYPE_Lab:
                imageType = TIFF_CIELAB;
                break;
            case ColorSpace.TYPE_RGB:
                if (compression == COMP_JPEG_TTN2
                        && encodeParam.getJPEGCompressRGBToYCbCr()) {
                    imageType = TIFF_YCBCR;
                } else {
                    imageType = TIFF_RGB;
                }
                break;
            case ColorSpace.TYPE_YCbCr:
                imageType = TIFF_YCBCR;
                break;
            default:
                imageType = TIFF_GENERIC; // generic
                break;
            }


            if (imageType == TIFF_GENERIC) {
                numExtraSamples = numBands - 1;
            } else if (numBands > 1) {
                numExtraSamples = numBands - colorSpace.getNumComponents();
            }


            if (numExtraSamples == 1 && colorModel.hasAlpha()) {
                extraSampleType = colorModel.isAlphaPremultiplied() ?
                    EXTRA_SAMPLE_ASSOCIATED_ALPHA :

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     * @param width
     * @param height
     * @return the raster
     */
    public static final WritableRaster createRaster(int width, int height) {
        final ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
        final int[] nBits = {8};
        final ComponentColorModel cm = new ComponentColorModel(cs, nBits,
            false, true, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
        return cm.createCompatibleWritableRaster(width, height);
    }

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        this.raster = raster;
        surfaceType = type;


        data = AwtImageBackdoorAccessor.getInstance().
        getData(raster.getDataBuffer());
        ColorSpace cs = cm.getColorSpace();
        transparency = cm.getTransparency();
        width = raster.getWidth();
        height = raster.getHeight();


        // For the moment we can build natively only images which have

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                    numExtraSamples = numBands - 1;
                }
            }


        } else { // colorModel is non-null but not an IndexColorModel
            ColorSpace colorSpace = colorModel.getColorSpace();


            switch(colorSpace.getType()) {
            case ColorSpace.TYPE_CMYK:
                imageType = TIFF_CMYK;
                break;
            case ColorSpace.TYPE_GRAY:
                imageType = TIFF_GRAY;
                break;
            case ColorSpace.TYPE_Lab:
                imageType = TIFF_CIELAB;
                break;
            case ColorSpace.TYPE_RGB:
                if(compression == COMP_JPEG_TTN2 &&
                   encodeParam.getJPEGCompressRGBToYCbCr()) {
                    imageType = TIFF_YCBCR;
                } else {
                    imageType = TIFF_RGB;
                }
                break;
            case ColorSpace.TYPE_YCbCr:
                imageType = TIFF_YCBCR;
                break;
            default:
                imageType = TIFF_GENERIC; // generic
                break;
            }


            if(imageType == TIFF_GENERIC) {
                numExtraSamples = numBands - 1;
            } else if(numBands > 1) {
                numExtraSamples = numBands - colorSpace.getNumComponents();
            }


            if(numExtraSamples == 1 && colorModel.hasAlpha()) {
                extraSampleType = colorModel.isAlphaPremultiplied() ?
                    EXTRA_SAMPLE_ASSOCIATED_ALPHA :

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            /**
             * Check that the number of color components match in the input
             * image and in the replacing profile.
             */
            ColorModel imgCM = img.getColorModel();
            ColorSpace imgCS = imgCM.getColorSpace();
            int nImageComponents = imgCS.getNumComponents();
            int nProfileComponents = colorSpace.getNumComponents();
            if(nImageComponents != nProfileComponents){
                // Should we go in error???? Here we simply trace an error
                // and return null
                System.err.println("Input image and associated color profile have" +

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      BufferedImage image1=null, image2 = null;
      image1 = graph.getImage();
      image2 = image1.getSubimage(275, 150, 250, 300);
      ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
      ColorConvertOp op = new ColorConvertOp(cs, null);  
      image1 = op.filter(image2, null); 
      BufferedImage image3 = image1.getSubimage(0, 0, 125, 150); 
      File outputfile = new File("C://temp.png");
      JFileChooser jf = new JFileChooser();

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  public void testConstructor1(TestHarness harness)
  {
    harness.checkPoint("(ColorSpace, ColorSpace, RenderingHints)");


    // Simple test
    ColorSpace srcCs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
    ColorSpace dstCs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
    RenderingHints hints = new RenderingHints(RenderingHints.KEY_DITHERING,
                                              RenderingHints.VALUE_DITHER_ENABLE);
    hints.put(RenderingHints.KEY_COLOR_RENDERING,
              RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    ColorConvertOp op = new ColorConvertOp(srcCs, dstCs, hints);

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  public void testConstructor2(TestHarness harness)
  {
    harness.checkPoint("(ColorSpace, RenderingHints)");


    // Simple test
    ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
    RenderingHints hints = new RenderingHints(RenderingHints.KEY_DITHERING,
                                              RenderingHints.VALUE_DITHER_ENABLE);
    hints.put(RenderingHints.KEY_COLOR_RENDERING,
              RenderingHints.VALUE_COLOR_RENDER_QUALITY);
    ColorConvertOp op = new ColorConvertOp(cs, hints);

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    // Create a raster to work on
    BufferedImage img = new BufferedImage(20, 20, BufferedImage.TYPE_INT_RGB);
    Graphics2D g = (Graphics2D)img.getGraphics();
    g.draw(new Line2D.Double(0, 0, 20, 20));
    
    ColorSpace cs1 = ColorSpace.getInstance(ColorSpace.CS_sRGB);
    ColorSpace cs2 = ColorSpace.getInstance(ColorSpace.CS_GRAY);
    ColorConvertOp op = new ColorConvertOp(cs1, cs2, null);
    WritableRaster raster = img.getRaster();
    
    // Src and dst rasters cannot be the same (different from 
    // filter(BufferedImage, BufferedImage) )

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