How to use

HistogramDescriptor

in

javax.media.jai.operator

public void setImage(PlanarImage wrapRenderedImage)
{
  try {
    setHistogram((Histogram) HistogramDescriptor.create(
        wrapRenderedImage,
        null,
        1,
        1,
        new int[] { 65536 },
        new double[] { 0 },
        new double[] { 65535 },
        null).getProperty("histogram"));
  } catch(Exception e) {
    e.printStackTrace();
    setHistogram(null);
  }
}

public void setImage(PlanarImage wrapRenderedImage)
{
  try {
    setHistogram((Histogram) HistogramDescriptor.create(
        wrapRenderedImage,
        null,
        1,
        1,
        new int[] { 65536 },
        new double[] { 0 },
        new double[] { 65535 },
        null).getProperty("histogram"));
  } catch(Exception e) {
    e.printStackTrace();
    setHistogram(null);
  }
}

public static Histogram computeHistogram(RenderedImage image, ROI roi, int numBins, Range range) {
  final double min = range.getMin();
  final double max = range.getMax();
  Histogram histogram;
  if (min < max) {
    final RenderedOp histogramOp = HistogramDescriptor.create(image, 
                                 roi, 
                                 1, 
                                 1, 
                                 new int[]{numBins},
                                 new double[]{min},
                                 new double[]{max},
                                 null);
    histogram = getBeamHistogram(histogramOp);
  } else {
    final long imageSize = (long) image.getWidth() * image.getHeight();
    final int numPixels = (int) Math.min(Integer.MAX_VALUE, imageSize);
    histogram = new Histogram(new int[]{numPixels} , min, min);
  }
  return histogram;
}

/*******************************************************************************
 * 
 * @inheritDoc
 * 
 *******************************************************************************/
private void compute()
 {
  SampleModel sampleModel = renderedImage.getSampleModel();
  bandCount = sampleModel.getNumBands();
  int bits = DataBuffer.getDataTypeSize(sampleModel.getDataType());
  ROI roi = null;
  int[] bins = new int[bandCount];
  min = new double[bandCount];
  max = new double[bandCount];
  int maxxx = 1 << bits;
  for (int i = 0; i < bandCount; i++)
   {
    bins[i] = maxxx;
    min[i] = 0;
    max[i] = maxxx;
   }
  RenderingHints renderingHints = null;
  Integer xPeriod = new Integer(1);
  Integer yPeriod = new Integer(1);
  RenderedOp op = HistogramDescriptor.create(renderedImage, roi, xPeriod, yPeriod, bins, min, max, renderingHints);
  delegate = (Histogram)op.getProperty("histogram");
 }

/*******************************************************************************
 * 
 * @inheritDoc
 * 
 *******************************************************************************/
private void compute()
 {
  SampleModel sampleModel = renderedImage.getSampleModel();
  bandCount = sampleModel.getNumBands();
  int bits = DataBuffer.getDataTypeSize(sampleModel.getDataType());
  ROI roi = null;
  int[] bins = new int[bandCount];
  min = new double[bandCount];
  max = new double[bandCount];
  int maxxx = 1 << bits;
  for (int i = 0; i < bandCount; i++)
   {
    bins[i] = maxxx;
    min[i] = 0;
    max[i] = maxxx;
   }
  RenderingHints renderingHints = null;
  Integer xPeriod = new Integer(1);
  Integer yPeriod = new Integer(1);
  RenderedOp op = HistogramDescriptor.create(renderedImage, roi, xPeriod, yPeriod, bins, min, max, renderingHints);
  delegate = (Histogram)op.getProperty("histogram");
 }

      xPeriod, yPeriod, false, 1, null);
} else if (STATISTIC == 2) {
  imageStats = javax.media.jai.operator.HistogramDescriptor.create(testImage,
      roi, xPeriod, yPeriod, numBinsTest, minBoundsTest, maxBoundsTest, null);

final RenderedOp hist = HistogramDescriptor.create(inputImage,
    null, Integer.valueOf(1), Integer.valueOf(1),
    new int[] { 256 }, new double[] { 0 },