public IplImage ScannerContour(IplImage src)
{
con = new IplImage(src.Size, BitDepth.U8, 3);
Cv.Copy(src, con);
bin = this.Binary(src, 150);
CvMemStorage Storage = new CvMemStorage();
//CvSeq<CvPoint> contours;
CvContourScanner scanner = Cv.StartFindContours(bin, Storage, CvContour.SizeOf, ContourRetrieval.List, ContourChain.ApproxNone);
//while ((contours = Cv.FindNextContour(scanner)) != null)
//{
// if (contours[0].Value == new CvPoint(1, 1)) continue;
// Cv.DrawContours(con, contours, CvColor.Yellow, CvColor.Red, 1, 4, LineType.AntiAlias);
//}
//Cv.EndFindContours(scanner);
foreach (CvSeq <CvPoint> contours in scanner)
{
if (contours[0].Value == new CvPoint(1, 1))
{
continue;
}
con.DrawContours(contours, CvColor.Yellow, CvColor.Red, 1, 4, LineType.AntiAlias);
}
return(con);
}
public ContourScanner()
{
// create IplImages
using (IplImage src = new IplImage(Const.ImageLenna, LoadMode.Color))
using (IplImage gray = new IplImage(src.Size, BitDepth.U8, 1))
using (IplImage canny = new IplImage(src.Size, BitDepth.U8, 1))
using (IplImage result = src.Clone())
{
// detect edges
Cv.CvtColor(src, gray, ColorConversion.BgrToGray);
Cv.Canny(gray, canny, 50, 200);
// find all contours
using (CvMemStorage storage = new CvMemStorage())
{
// find contours by CvContourScanner
// native style
/*
* CvContourScanner scanner = Cv.StartFindContours(canny, storage, CvContour.SizeOf, ContourRetrieval.Tree, ContourChain.ApproxSimple);
* while (true)
* {
* CvSeq<CvPoint> c = Cv.FindNextContour(scanner);
* if (c == null)
* break;
* else
* Cv.DrawContours(result, c, CvColor.Red, CvColor.Green, 0, 3, LineType.AntiAlias);
* }
* Cv.EndFindContours(scanner);
* //*/
// wrapper style
using (CvContourScanner scanner = new CvContourScanner(canny, storage, CvContour.SizeOf, ContourRetrieval.Tree, ContourChain.ApproxSimple))
{
foreach (CvSeq <CvPoint> c in scanner)
{
result.DrawContours(c, CvColor.Red, CvColor.Green, 0, 3, LineType.AntiAlias);
}
}
}
// show canny and result
using (new CvWindow("ContourScanner canny", canny))
using (new CvWindow("ContourScanner result", result))
{
Cv.WaitKey();
}
}
}
public static IplImage testContours(IplImage target)
{
if (g_storage == null)
{
g_gray = new IplImage(target.Size, BitDepth.U8, 1);
g_binary = new IplImage(target.Size, BitDepth.U8, 1);
g_storage = new CvMemStorage(0);
}
else
{
g_storage.Clear();
}
CvSeq <CvPoint> contours;
target.CvtColor(g_gray, ColorConversion.BgrToGray);
g_gray.Threshold(g_gray, g_thresh, 255, ThresholdType.Binary);
g_gray.Copy(g_binary);
g_gray.FindContours(g_storage, out contours, CvContour.SizeOf, ContourRetrieval.CComp);
g_gray.Zero();
if (contours != null)
{
contours.ApproxPoly(CvContour.SizeOf, g_storage, ApproxPolyMethod.DP, 3, true);
g_gray.DrawContours(contours, new CvScalar(255), new CvScalar(128), 100);
}
//g_gray.Dilate(g_gray, null, 2);
//g_gray.Erode(g_gray, null, 2);
return(g_gray);
}
