private void updateHistogramGraph(double min, double max) {
xAxis.clear();
currentMaxMin.max = max;
currentMaxMin.min = min;
histogramFunc.setMinMax(min, max);
histogramFunc.setIgnoreOutliers(true);
// sanity check if there is actually a histogram live
List<? extends Dataset> newHistogram = histogramFunc.value(data);
Dataset histogram = newHistogram.get(0);
if (histograms != null && histograms.size() > 1) {
histograms.set(histograms.size() - 1, histogram);
} else {
histograms = new ArrayList<Dataset>();
histograms.add(histogram);
}
// Some logging to check on the histograms size
logger.debug("number of histograms stored is {}", histograms.size());
if (histograms.size() > 10) {
logger.warn(
"Number of stored histograms is over expected levels, now at {}", histograms.size());
}
xAxis.setValues(
DatasetUtils.linSpace(min, max, Math.max(1, histogram.getSize() + 1), Dataset.FLOAT64));
histogramPlotter.setXAxisValues(xAxis, 1);
generateHistogramUpdate();
updateChannelGraphs();
histogramPlotter.refresh(true);
}
private void autoRangeHistogram() {
histogramPlotter.clearZoomHistory();
double[] m;
if (autoContrast && data.getRank() == 2) {
try {
final int[] shape = data.getShape();
if (shape[0] > 512 && shape[1] > 512) {
int yReduce = (int) Math.ceil(shape[0] / 512.0);
int xReduce = (int) Math.ceil(shape[1] / 512.0);
Downsample sample = new Downsample(DownsampleMode.MAXIMUM, xReduce, yReduce);
m =
Stats.quantile(
(Dataset) sample.value(data).get(0),
getPreferenceAutoContrastLo(),
getPreferenceAutoContrastHi());
} else
m = Stats.quantile(data, getPreferenceAutoContrastLo(), getPreferenceAutoContrastHi());
} catch (Exception e) {
m = new double[] {data.min().doubleValue(), data.max().doubleValue()};
}
} else {
m = new double[] {data.min().doubleValue(), data.max().doubleValue()};
}
if (Double.compare(m[1], m[0]) <= 0)
m[1] = m[0] + PreferenceConstants.MINIMUM_CONTRAST_DELTA / 100.0;
currentMaxMin.max = m[1];
currentMaxMin.min = m[0];
}
public void createInitialHistogram() {
if (!hasData()) return;
MaxMin oldMM = currentMaxMin;
currentMaxMin = (MaxMin) cachedMaxMin.get(data.hashCode());
if (currentMaxMin == null) {
currentMaxMin = new MaxMin();
cachedMaxMin.put(data.hashCode(), currentMaxMin);
}
if (lockRange && oldMM != null) {
currentMaxMin.max = oldMM.max;
currentMaxMin.min = oldMM.min;
} else {
if (autoContrast || Double.isNaN(currentMaxMin.max) || Double.isNaN(currentMaxMin.min))
autoRangeHistogram();
}
if (latestHistrogramUIUpdater == null || !latestHistrogramUIUpdater.inqueue) {
latestHistrogramUIUpdater = new HistrogramUIUpdater();
parent.getDisplay().asyncExec(latestHistrogramUIUpdater);
}
}
public static void main(String args[]) {
MaxMin maxMin = new MaxMin();
maxMin.maximumMinimum();
}
