javax.media.jai.Histogram.getBins()方法的使用及代码示例

x33g5p2x  于2022-01-20 转载在 其他  
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本文整理了Java中javax.media.jai.Histogram.getBins()方法的一些代码示例，展示了Histogram.getBins()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Histogram.getBins()方法的具体详情如下：
包路径：javax.media.jai.Histogram
类名称：Histogram
方法名：getBins

Histogram.getBins介绍

暂无

代码示例

代码示例来源：origin: bcdev/beam

private static void migrateOldHistogramData(Histogram oldHistogram, Histogram newHistogram, int startOffset, int binRatio) {
  final int[] oldBins = oldHistogram.getBins(0);
  final int[] newBins = newHistogram.getBins(0);
  final int newMaxIndex = newBins.length - 1;
  for (int i = 0; i < oldBins.length; i++) {
    int newBinsIndex = (startOffset + i) / binRatio;
    if (newBinsIndex > newMaxIndex) {
      newBinsIndex = newMaxIndex;
    }
    newBins[newBinsIndex] += oldBins[i];
  }
}

代码示例来源：origin: bcdev/beam

/**
 * @return The histogram bins (sample counts).
 */
public int[] getHistogramBins() {
  return histogram.getBins(0);
}

代码示例来源：origin: bcdev/beam

static Histogram createHistogram(double minimum, double maximum, boolean logHistogram, boolean intHistogram, int[] bins) {
  final Histogram histogram = createHistogram(bins.length, minimum, maximum, logHistogram, intHistogram);
  System.arraycopy(bins, 0, histogram.getBins(0), 0, bins.length);
  return histogram;
}

代码示例来源：origin: org.imajine/org-imajine-image-plugin-jai

/*******************************************************************************
 * 
 * @inheritDoc
 * 
 *******************************************************************************/
public int[] getFrequencies (int band)
 {
  validateBand(band);
  ensureDataComputed();
  return delegate.getBins(band);
 }

代码示例来源：origin: org.imajine.image/org-imajine-image-plugin-jai

/*******************************************************************************
 * 
 * @inheritDoc
 * 
 *******************************************************************************/
@Override
public int[] getFrequencies (int band)
 {
  validateBand(band);
  ensureDataComputed();
  return delegate.getBins(band);
 }

代码示例来源：origin: geosolutions-it/jai-ext

private void setHistogram(Histogram histogram)
{
  this.histogram = histogram;
  if(histogram != null) {
    // Calculate the components dimensions.
    width = histogram.getNumBins(0) * binWidth;
    // Get the histogram data.
    counts = histogram.getBins(0);
    // Get the max and min counts.
    maxCount = Integer.MIN_VALUE;
    for (int c = 0; c < counts.length; c++)
    {
      maxCount = Math.max(maxCount, counts[c]);
    }
  }
  repaint();
}

代码示例来源：origin: it.geosolutions.jaiext.utilities/jt-utilities

private void setHistogram(Histogram histogram)
{
  this.histogram = histogram;
  if(histogram != null) {
    // Calculate the components dimensions.
    width = histogram.getNumBins(0) * binWidth;
    // Get the histogram data.
    counts = histogram.getBins(0);
    // Get the max and min counts.
    maxCount = Integer.MIN_VALUE;
    for (int c = 0; c < counts.length; c++)
    {
      maxCount = Math.max(maxCount, counts[c]);
    }
  }
  repaint();
}

代码示例来源：origin: bcdev/beam

private static Histogram createHistogram(Stx[] stxs) {
  Histogram histogram = new Histogram(stxs[0].getHistogramBinCount(), 0, 256, stxs.length);
  for (int i = 0; i < stxs.length; i++) {
    System.arraycopy(stxs[i].getHistogramBins(), 0, histogram.getBins(i), 0, stxs[0].getHistogramBinCount());
  }
  return histogram;
}

代码示例来源：origin: locationtech/geowave

highValue[b] = Math.max(highValue1[b], highValue2[b]);
final int[][] bins1 = histogram1.getBins();
final int[][] bins2 = histogram2.getBins();
final int[] numBins = new int[numBands];
for (int b = 0; b < numBands; b++) {
 final int[] bins = histogram.getBins(b);
 for (int i = 0; i < bins.length; i++) {
  bins[i] = bins1[b][i] + bins2[b][i];

代码示例来源：origin: bcdev/beam

private static void migrateOldHistogramData(Histogram oldHistogram, Histogram newHistogram) {
  final double oldMin = oldHistogram.getLowValue(0);
  final double oldMax = oldHistogram.getHighValue(0);
  final int[] oldBins = oldHistogram.getBins(0);
  final int oldNumBins = oldBins.length;
  final double oldBinWidth = computeBinWidth(oldMin, oldMax, oldNumBins);
  final double newMin = newHistogram.getLowValue(0);
  final double newMax = newHistogram.getHighValue(0);
  final int[] newBins = newHistogram.getBins(0);
  final int newNumBins = newBins.length;
  final double newBinWidth = computeBinWidth(newMin, newMax, newNumBins);
  for (int i = 0; i < oldBins.length; i++) {
    int count = oldBins[i];
    if (count == 0) {
      continue;
    }
    final double binCenterValue = oldMin + oldBinWidth * i + oldBinWidth / 2;
    int newBinIndex = (int) Math.floor((binCenterValue - newMin) / newBinWidth);
    if (newBinIndex >= newNumBins) {
      newBinIndex = newNumBins - 1;
    }
    newBins[newBinIndex] += count;
  }
}

代码示例来源：origin: bcdev/beam

private static Histogram getBeamHistogram(RenderedOp histogramImage) {
  javax.media.jai.Histogram jaiHistogram = JAIUtils.getHistogramOf(histogramImage);
    int[] bins = jaiHistogram.getBins(0);
  int minIndex = 0;
  int maxIndex = bins.length - 1;
  for (int i = 0; i < bins.length; i++) {
    if (bins[i] > 0) {
      minIndex = i;
      break;
    }
  }
  for (int i = bins.length - 1; i >= 0; i--) {
    if (bins[i] > 0) {
      maxIndex = i;
      break;
    }
  }
  double lowValue = jaiHistogram.getLowValue(0);
  double highValue = jaiHistogram.getHighValue(0);
  int numBins = jaiHistogram.getNumBins(0);
  double binWidth = (highValue - lowValue) / numBins;
  int[] croppedBins = new int[maxIndex - minIndex + 1];
  System.arraycopy(bins, minIndex, croppedBins, 0, croppedBins.length);
  return new Histogram(croppedBins, lowValue + minIndex * binWidth, lowValue
      + (maxIndex + 1.0) * binWidth);
}

代码示例来源：origin: bcdev/beam

static double computeMedian(Histogram histogram, long sampleCount) {
  boolean isEven = sampleCount % 2 == 0;
  double halfSampleCount = sampleCount / 2.0;
  final int bandIndex = 0;
  int[] bins = histogram.getBins(bandIndex);
  long currentSampleCount = 0;
  int lastConsideredBinIndex = 0;
  for (int i = 0, binsLength = bins.length; i < binsLength; i++) {
    currentSampleCount += bins[i];
    if (currentSampleCount > halfSampleCount) {
      if (isEven) {
        double binValue = getMeanOfBin(histogram, bandIndex, i);
        double lastBinValue = getMeanOfBin(histogram, bandIndex, lastConsideredBinIndex);
        return (lastBinValue + binValue) / 2;
      } else {
        final double binLowValue = histogram.getBinLowValue(bandIndex, i);
        final double binMaxValue = histogram.getBinLowValue(bandIndex, i + 1);
        final double previousSampleCount = currentSampleCount - bins[i];
        double weight = (halfSampleCount - previousSampleCount) / (currentSampleCount - previousSampleCount);
        return binLowValue * (1 - weight) + binMaxValue * weight;
      }
    }
    if (bins[i] > 0) {
      lastConsideredBinIndex = i;
    }
  }
  return Double.NaN;
}

代码示例来源：origin: senbox-org/snap-desktop

int[] bins = histogram.getBins(0);
for (int j = 0; j < bins.length; j++) {
  histogramSeries.add(histogram.getBinLowValue(0, j),

代码示例来源：origin: bcdev/beam

int[] bins = histogram.getBins(0);
for (int j = 0; j < bins.length; j++) {
  histogramSeries.add(histogram.getBinLowValue(0, j),

代码示例来源：origin: bcdev/beam

this.sampleCount = StxFactory.computeSum(histogram.getBins(0));
this.minimum = minimum;
this.maximum = maximum;

代码示例来源：origin: bcdev/beam

private void copyStx(RasterDataNode sourceRaster, RasterDataNode targetRaster) {
  final Stx sourceStx = sourceRaster.getStx();
  final Histogram sourceHistogram = sourceStx.getHistogram();
  final Histogram targetHistogram = new Histogram(sourceStx.getHistogramBinCount(),
                          sourceHistogram.getLowValue(0),
                          sourceHistogram.getHighValue(0),
                          1);
  System.arraycopy(sourceHistogram.getBins(0), 0, targetHistogram.getBins(0), 0, sourceStx.getHistogramBinCount());
  final Stx targetStx = new Stx(sourceStx.getMinimum(),
                 sourceStx.getMaximum(),
                 sourceStx.getMean(),
                 sourceStx.getStandardDeviation(),
                 sourceStx.isLogHistogram(),
                 sourceStx.isIntHistogram(),
                 targetHistogram,
                 sourceStx.getResolutionLevel());
  targetRaster.setStx(targetStx);
}

代码示例来源：origin: bcdev/beam

final int[] bins = histogram.getBins(0);
final double lowValue = histogram.getLowValue(0);
final double highValue = histogram.getHighValue(0);

代码示例来源：origin: bcdev/beam

@Test
public void testPercentiles() throws Exception {
  int[] samples = new int[]{0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9, 9, 9};
  Arrays.sort(samples);
  double p0 = samples[0];
  double p25 = samples[samples.length / 4 - 1];
  double p50 = samples[samples.length / 2 - 1];
  double p75 = samples[3 * samples.length / 4 - 1];
  double p100 = samples[samples.length - 1];
  int[] bins = new int[10];
  for (int sample : samples) {
    bins[sample]++;
  }
  Histogram histogram = new Histogram(new int[]{10}, new double[]{0.0}, new double[]{10.0});
  System.arraycopy(bins, 0, histogram.getBins(0), 0, 10);
  assertEquals(p0, histogram.getPTileThreshold(0.00001)[0], 1E-10);
  assertEquals(p50, histogram.getPTileThreshold(0.50)[0], 1E-10);
  assertEquals(p25, histogram.getPTileThreshold(0.25)[0], 1E-10);
  assertEquals(p75, histogram.getPTileThreshold(0.75)[0], 1E-10);
  assertEquals(p100, histogram.getPTileThreshold(0.99999)[0], 1E-10);
}

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