Examples of java.awt.image.ColorConvertOp

java.awt.image.ColorConvertOp
This class performs a pixel-by-pixel color conversion of the data in the source image. The resulting color values are scaled to the precision of the destination image. Color conversion can be specified via an array of ColorSpace objects or an array of ICC_Profile objects.
If the source is a BufferedImage with premultiplied alpha, the color components are divided by the alpha component before color conversion. If the destination is a BufferedImage with premultiplied alpha, the color components are multiplied by the alpha component after conversion. Rasters are treated as having no alpha channel, i.e. all bands are color bands.
If a RenderingHints object is specified in the constructor, the color rendering hint and the dithering hint may be used to control color conversion.
Note that Source and Destination may be the same object.
@see java.awt.RenderingHints#KEY_COLOR_RENDERING @see java.awt.RenderingHints#KEY_DITHERING

             *                    srcBI.getHeight());
             * System.out.println("dst: " + dstBI.getWidth() + "x" + 
             *                    dstBI.getHeight());
             */


            ColorConvertOp op = new ColorConvertOp(null);
            op.filter(srcBI, dstBI);


            if (dstCM.hasAlpha())
                copyBand(srcWr, srcSM.getNumBands()-1,
                         wr,    getSampleModel().getNumBands()-1);
        }

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                            if (cs == JPEG.JCS.getYCC()) {
                                if (!alpha) {
                                    if (jfif != null) {
                                        convertTosRGB = true;
                                        convertOp =
                                        new ColorConvertOp(cs,
                                                           JPEG.JCS.sRGB,
                                                           null);
                                        outCsType = JPEG.JCS_YCbCr;
                                    } else if (adobe != null) {
                                        if (adobe.transform

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                            if (cs == JPEG.JCS.getYCC()) {
                                if (!alpha) {
                                    if (jfif != null) {
                                        convertTosRGB = true;
                                        convertOp = 
                                        new ColorConvertOp(cs, 
                                                           JPEG.JCS.sRGB, 
                                                           null);
                                        outCsType = JPEG.JCS_YCbCr;
                                    } else if (adobe != null) {
                                        if (adobe.transform

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            } else if ((iccCS != null) && 
                       (cm.getNumComponents() == numComponents) &&
                       (cs != iccCS)) {  
                // We have an ICC profile but it isn't used in the dest
                // image.  So convert from the profile cs to the target cs
                convert = new ColorConvertOp(iccCS, cs, null);
                // Leave IJG conversion in place; we still need it
            } else if ((iccCS == null) &&
                       (!cs.isCS_sRGB()) &&
                       (cm.getNumComponents() == numComponents)) {
                // Target isn't sRGB, so convert from sRGB to the target
                convert = new ColorConvertOp(JPEG.JCS.sRGB, cs, null);
            } else if (csType != ColorSpace.TYPE_RGB) {
                throw new IIOException("Incompatible color conversion");
            }
            break;
        case JPEG.JCS_RGBA:
            // No conversions available; image must be RGBA
            if ((csType != ColorSpace.TYPE_RGB) ||
                (cm.getNumComponents() != numComponents)) {
                throw new IIOException("Incompatible color conversion");
            }
            break;
        case JPEG.JCS_YCC:
            {
                ColorSpace YCC = JPEG.JCS.getYCC();
                if (YCC == null) { // We can't do YCC at all
                    throw new IIOException("Incompatible color conversion");
                }
                if ((cs != YCC) &&
                    (cm.getNumComponents() == numComponents)) {
                    convert = new ColorConvertOp(YCC, cs, null);
                }
            }
            break;
        case JPEG.JCS_YCCA:
            {

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            srcG.setColor(colors[colors.length-1-i%colors.length]);
            srcG.fillRect(i*rw, 0, rw, rh);
        }


        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
        ColorConvertOp theOp = new ColorConvertOp(cs, rhs);


        BufferedImage dstImg = 
                new BufferedImage(iw, ih, BufferedImage.TYPE_INT_RGB);
        theOp.filter(srcImg, dstImg);


        g2.drawImage(srcImg,     10, 20, w/2-20, h-30, null);
        g2.drawImage(dstImg, w/2+10, 20, w/2-20, h-30, null);
    }

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            colorFilter = null;
        }


        String grayscalePar = par.getParameter("grayscale", GRAYSCALE_DEFAULT);
        if (BooleanUtils.toBoolean(grayscalePar)){            
            grayscaleFilter = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null);
        } else {
            grayscaleFilter = null;
        }   
        String enlargePar = par.getParameter("allow-enlarging", ENLARGE_DEFAULT);
        enlarge = BooleanUtils.toBoolean(enlargePar);

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     * A utility method to produce a gray scale {@link java.awt.image.BufferedImage}
     * @param buff
     * @return gray scale {@link java.awt.image.BufferedImage}
     */
    public static BufferedImage grayScale(BufferedImage buff){
      ColorConvertOp op = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null);
      BufferedImage grayImage = op.filter(buff, null);
      return grayImage;
    }

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     * A utility method to produce a gray scale {@link java.awt.image.BufferedImage}
     * @param buff
     * @return gray scale {@link java.awt.image.BufferedImage}
     */
    public static BufferedImage grayScale(BufferedImage buff){
      ColorConvertOp op = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null);
      BufferedImage grayImage = op.filter(buff, null);
      return grayImage;
    }

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    if (!enabled) {
      if (!this.htImage.contains(this.getName(name, enabled))) {
        BufferedImage img = this.htImage.get(name);
        
        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
        ColorConvertOp op = new ColorConvertOp(cs, null);
        
        BufferedImage result = op.filter(img , null);
        
        this.htImage.put(this.getName(name , enabled) , result);
      }
      name = this.getName(name , enabled);
    }

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    if (!enabled) {
      if (!this.htImage.contains(this.getName(name, enabled))) {
        BufferedImage img = this.htImage.get(name);
        
        ColorSpace cs = ColorSpace.getInstance(ColorSpace.CS_GRAY);
        ColorConvertOp op = new ColorConvertOp(cs, null);
        
        BufferedImage result = op.filter(img , null);
        
        this.htImage.put(this.getName(name , enabled) , result);
      }
      name = this.getName(name , enabled);
    }

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