Examples of java.awt.image.Kernel

java.awt.image.Kernel
The Kernel class defines a matrix that describes how a specified pixel and its surrounding pixels affect the value computed for the pixel's position in the output image of a filtering operation. The X origin and Y origin indicate the kernel matrix element that corresponds to the pixel position for which an output value is being computed. @see ConvolveOp @version 10 Feb 1997

    private Kernel makeQualityKernelX(int len) {
        return new Kernel(len, 1, computeQualityKernelData(len, stdDevX));
    }


    private Kernel makeQualityKernelY(int len) {
        return new Kernel(1, len, computeQualityKernelData(len, stdDevY));
    }

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     * @param kernelHeight the height
     * @param kernelData the data
     */
    public HeightMapFilter(int kernelWidth, int kernelHeight, float[] kernelData) {
        checkNotNull(kernelData);
        this.kernel = new Kernel(kernelWidth, kernelHeight, kernelData);
    }

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        // build the convolve filter
        ConvolveMatrixRable convolve = new ConvolveMatrixRable8Bit(pad);
        for (int i = 0; i < kernelMatrix.length; i++) {
            kernelMatrix[i] /= divisor;
        }
        convolve.setKernel(new Kernel(orderXY[0], orderXY[1], kernelMatrix));
        convolve.setTarget(new Point(targetXY[0], targetXY[1]));
        convolve.setBias(bias);
        convolve.setEdgeMode(padMode);
        convolve.setKernelUnitLength(kernelUnitLength);
        convolve.setPreserveAlpha(preserveAlpha);

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        for (int i = 0; i < mtx.length; i++) {
            mtx[i] /= total;
        }


        return new Kernel(width, width, mtx);
    }

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  {
    harness.checkPoint("createCompatibleDestRaster");


    // Simple test
    Raster src = Raster.createBandedRaster(DataBuffer.TYPE_INT, 25, 40, 3, new Point(5, 5));
    Kernel kern = new Kernel(3, 3, new float[] {1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 9f});
    ConvolveOp op = new ConvolveOp(kern, ConvolveOp.EDGE_NO_OP, null);
    
    try
    {
      Raster dst = op.createCompatibleDestRaster(src);

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  }
  
  public void testMethod1(TestHarness harness)
  {
    harness.checkPoint("(Raster)");
    Kernel k1 = new Kernel(3, 3, new float[] {1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 
            9f});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_NO_OP, null);


    Raster r = Raster.createBandedRaster(DataBuffer.TYPE_BYTE, 4, 30, 3, null);
    Rectangle2D bounds = op.getBounds2D(r);

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  }
  
  public void testMethod2(TestHarness harness)
  {
    harness.checkPoint("(BufferedImage)");
    Kernel k1 = new Kernel(3, 3, new float[] {1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 
            9f});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_NO_OP, null);


    BufferedImage image = new BufferedImage(5, 10, BufferedImage.TYPE_BYTE_GRAY);
    Rectangle2D bounds = op.getBounds2D(image);

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public class getRenderingHints implements Testlet
{
  public void test(TestHarness harness)
  {
    Kernel k1 = new Kernel(3, 3, new float[] {1f, 2f, 3f, 4f, 5f, 6f, 7f, 8f, 
            9f});
    RenderingHints r = new RenderingHints(RenderingHints.KEY_DITHERING, 
            RenderingHints.VALUE_DITHER_DISABLE);
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_NO_OP, r);
    harness.check(op.getRenderingHints(), r);

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   * 
   * @param harness  the test harness (<code>null</code> not permitted). 
   */
  public void test(TestHarness harness)      
  {
    Kernel k1 = new Kernel(1, 1, new float[] {1f});
    ConvolveOp op1 = new ConvolveOp(k1);
    Kernel k2 = op1.getKernel();
    harness.check(Arrays.equals(k1.getKernelData(null), k2.getKernelData(null)));
    harness.check(k1 != k2);
    
    // each call seems to clone the kernel
    Kernel k3 = op1.getKernel();
    harness.check(k2 != k3);
  }

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  public void testRaster1(TestHarness harness)
  {
    harness.checkPoint("testRaster1()");
    Raster src = createRasterA();
    WritableRaster dest = src.createCompatibleWritableRaster();
    Kernel k1 = new Kernel(1, 1, new float[] {1});
    ConvolveOp op = new ConvolveOp(k1, ConvolveOp.EDGE_ZERO_FILL, null);
    dest = op.filter(src, dest);
    harness.check(dest.getSample(0, 0, 0), 1);
    harness.check(dest.getSample(1, 0, 0), 2);
    harness.check(dest.getSample(2, 0, 0), 3);

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