/// <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();
}
private void video_SelectionChanged(object sender, EventArgs f)
{
if (videoPlayer.LastFrame == null)
{
return;
}
using (CVImage region = videoPlayer.LastFrame.CopyRegion(video.SelectionRect))
{
selectionHistogram = region.CalcHistogram(30);
}
ProcessRegionGrowing();
}
private void meanShiftNoMask_SelectionChanged(object sender, EventArgs e)
{
using (CVImage frame = videoPlayer.LastFrame.CopyRegion(meanShiftNoMask.SelectionRect))
{
if (histNoMask != null)
{
histNoMask.Dispose();
}
histNoMask = frame.CalcHistogram(Bins);
noMaskHist.BinsPerChannel = Bins;
noMaskHist.ShowHistogram(frame);
}
NextFrame(false);
}
private void CalculateMaskedHistogram()
{
if (videoPlayer.LastFrame == null)
{
return;
}
using (CVImage frame = videoPlayer.LastFrame.CopyRegion(meanShift.SelectionRect))
{
// create a list of real fg and bg markers.
List <Point> realFg = new List <Point>(meanShift.GetMarkerLocations(Color.Blue));
List <Point> realBg = new List <Point>(meanShift.GetMarkerLocations(Color.Red));
// create the histogram mask.
using (CVImage mask = MaskedHistogram.PrepareMask(frame, realFg.ToArray(), realBg.ToArray(), includeNeautral.Checked, ffThresh.Value))
{
maskPicture.Image = mask.ToBitmap();
// show mask histogram to user interface.
maskHistogram.BinsPerChannel = Bins;
maskHistogram.ShowHistogram(frame, mask);
// calculate new histogram (dispose old one if exist).
if (hist != null)
{
hist.Dispose();
}
hist = frame.CalcHistogram(Bins, mask);
// apply mask to overlay (just for ui).
using (CVImage masked = MaskedHistogram.ApplyMask(frame, mask))
{
maskOverlay.Image = masked.ToBitmap();
}
}
}
NextFrame(false);
}
