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

    }
    
    private void grayscale() {
        img = picture.getImage();
        BufferedImage src = Utilities.toBufferedImage(new DcImageIcon(img));
        BufferedImageOp op = new ColorConvertOp(ColorSpace.getInstance(ColorSpace.CS_GRAY), null); 
        update(op, src);
    }

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  // directly calling the ColorConvert operation fails for unknown reasons ?!
  public PlanarImage toDirectColorModel(RenderedImage img) {
    BufferedImage dest = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
    BufferedImage source = new BufferedImage(img.getColorModel(), (WritableRaster) img.getData(), img
        .getColorModel().isAlphaPremultiplied(), null);
    ColorConvertOp op = new ColorConvertOp(null);
    op.filter(source, dest);
    return PlanarImage.wrapRenderedImage(dest);
  }

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  // directly calling the ColorConvert operation fails for unknown reasons ?!
  public PlanarImage toDirectColorModel(RenderedImage img) {
    BufferedImage dest = new BufferedImage(img.getWidth(), img.getHeight(), BufferedImage.TYPE_4BYTE_ABGR);
    BufferedImage source = new BufferedImage(img.getColorModel(), (WritableRaster) img.getData(), img
        .getColorModel().isAlphaPremultiplied(), null);
    ColorConvertOp op = new ColorConvertOp(null);
    op.filter(source, dest);
    return PlanarImage.wrapRenderedImage(dest);
  }

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        hints.put(RenderingHints.KEY_COLOR_RENDERING,
                RenderingHints.VALUE_COLOR_RENDER_QUALITY);
        hints.put(RenderingHints.KEY_DITHERING,
                RenderingHints.VALUE_DITHER_ENABLE);


        ColorConvertOp op = new ColorConvertOp(from, to, hints);


        BufferedImage result = op.filter(bi, null);


        result = relabelColorSpace(result, to);


        return result;
    }

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        // dumpColorSpace("\tcs_sRGB", cs_sRGB);
        // dumpColorSpace("\tColorModel.getRGBdefaultc",
        // ColorModel.getRGBdefault().getColorSpace());


        bi = relabelColorSpace(bi, from);
        ColorConvertOp op = new ColorConvertOp(from, to, hints);
        bi = op.filter(bi, null);


        bi = relabelColorSpace(bi, from);


        bi = op.filter(bi, null);


        bi = relabelColorSpace(bi, to);


        return bi;

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        hints.put(RenderingHints.KEY_COLOR_RENDERING,
                RenderingHints.VALUE_COLOR_RENDER_QUALITY);
        hints.put(RenderingHints.KEY_DITHERING,
                RenderingHints.VALUE_DITHER_ENABLE);


        ColorConvertOp op = new ColorConvertOp(from, to, hints);


        bi = relabelColorSpace(bi, from);


        BufferedImage result = op.filter(bi, null);


        result = relabelColorSpace(result, to);


        return result;
    }

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        // the following code is by David Ekholm from the GrayscaleFilter
        final Graphics2D g = bi.createGraphics();
        final RenderingHints rhs = g.getRenderingHints();


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


        final BufferedImage dstImg = new BufferedImage(bi.getWidth(), bi.getHeight(), bi.getType());
        theOp.filter(bi, dstImg);


        return dstImg;
    }

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        return dstImg;
    }


    private BufferedImage convertType(BufferedImage src, int type) {
        ColorConvertOp cco = new ColorConvertOp(null);
        BufferedImage dest = new BufferedImage(src.getWidth(), src.getHeight(), type);
        cco.filter(src, dest);
        return dest;
    }

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  }


  ArrayList hashcode = new ArrayList(2);
  hashcode.add(0, src);
  hashcode.add(1, dst);
  ColorConvertOp op = (ColorConvertOp)colorConvertOpBuf.get(hashcode);


  if (op == null) {
      op = new ColorConvertOp(src, dst, null);
      colorConvertOpBuf.put(hashcode, op);
  }


  return op;
    }

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                     DataBuffer.TYPE_BYTE);


                dstBI = new BufferedImage(cmna, dstWr, false, null);
            }


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


            // I never have to 'fix' alpha premult since I take
            // it's value from my source....
            if (dstCM.hasAlpha())
                copyBand(srcWr, sm.getNumBands()-1,

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