/// <summary>
/// Calculate the histogram for the region of interest and saves it under
/// initialHistogram.
/// </summary>
private void UpdateHistogram()
{
// release the previous histogram if any.
if (initialHistogram != null)
{
initialHistogram.Release();
}
// if there's no image, just return.
if (image == null)
{
return;
}
// we use symmetric bins and entire range.
int[] bpBins = { NumberOfBins, NumberOfBins, NumberOfBins };
CVPair[] bpRanges = { new CVPair(0, 255), new CVPair(0, 255), new CVPair(0, 255) };
// calculate histogram for region of interest and display it in panel.
image.RegionOfInterest = originalImage.SelectionRect;
this.initialHistogram = image.CalcHistogram(bpBins, bpRanges);
initHisto.ShowHistogram(image);
image.ResetROI();
ResetSegmentation();
RefreshImages();
}