public HoughCircles()
{
using (IplImage imgSrc = new IplImage(FilePath.Image.Walkman, LoadMode.Color))
using (IplImage imgGray = new IplImage(imgSrc.Size, BitDepth.U8, 1))
using (IplImage imgHough = imgSrc.Clone())
{
Cv.CvtColor(imgSrc, imgGray, ColorConversion.BgrToGray);
Cv.Smooth(imgGray, imgGray, SmoothType.Gaussian, 9);
//Cv.Canny(imgGray, imgGray, 75, 150, ApertureSize.Size3);
using (var storage = new CvMemStorage())
{
CvSeq <CvCircleSegment> seq = imgGray.HoughCircles(storage, HoughCirclesMethod.Gradient, 1, 100, 150, 55, 0, 0);
foreach (CvCircleSegment item in seq)
{
imgHough.Circle(item.Center, (int)item.Radius, CvColor.Red, 3);
}
}
using (new CvWindow("gray", WindowMode.AutoSize, imgGray))
using (new CvWindow("Hough circles", WindowMode.AutoSize, imgHough))
{
CvWindow.WaitKey(0);
}
}
}
public IplImage PostProcess(IplImage preProcessedImage, IplImage postProcessedImage)
{
using (CvMemStorage storage = new CvMemStorage())
{
CvSeq seq = preProcessedImage.HoughLines2(storage, HoughLinesMethod.Probabilistic, 1, Math.PI / 180, 30, 40, 15);
var lines = new List <CvLineSegmentPoint>();
for (int i = 0; i < seq.Total; i++)
{
var cvLineSegmentPoint = seq.GetSeqElem <CvLineSegmentPoint>(i);
if (cvLineSegmentPoint != null)
{
lines.Add(cvLineSegmentPoint.Value);
}
}
var groupedLines = RectangleFinder.GroupSegments(lines);
var rects = RectangleFinder.Convert(groupedLines);
RectangleFinder.Filter(rects);
foreach (var cvRect in rects)
{
postProcessedImage.Rectangle(cvRect, CvColor.Red, 3, LineType.AntiAlias);
}
//for (int i = 0; i < groupedLines.Count; i++)
//{
// var color = new CvColor(i*255/max,i*255/max,i*255/max);
// var group = groupedLines[i];
// for (int j = 0; j < group.Lines.Count; j++)
// {
// CvLineSegmentPoint elem = group.Lines[j];
// imgHough.Line(elem.P1, elem.P2, color, 3, LineType.AntiAlias, 0);
// }
//}
//Console.WriteLine(groupedLines.Count);
CvSeq <CvCircleSegment> seq1 = preProcessedImage.HoughCircles(storage,
HoughCirclesMethod.Gradient, 1,
//imgGray.Size.Height / 8, 150, 55, 0, 50);
15, 100, 30, 9, 51);
foreach (CvCircleSegment item in seq1)
{
postProcessedImage.Circle(item.Center, (int)item.Radius, CvColor.Red, 3);
}
}
return(postProcessedImage);
}