public CVImage DrawContours()
{
CVImage grayscaled = (this.Channels == 1 ? this : this.ToGrayscale());
__CvMemStoragePtr storage = PInvoke.cvCreateMemStorage(0);
__CvSeqPtr first_contour;
CVImage result = new CVImage(this.Width, this.Height, CVDepth.Depth8U, 3);
unsafe
{
int num_contours = PInvoke.cvFindContours(
grayscaled.Internal,
storage,
out first_contour,
sizeof(__CvContour),
CV_RETR.CV_RETR_EXTERNAL,
CV_CHAIN.CV_CHAIN_APPROX_SIMPLE,
new __CvPoint(0, 0)
);
// Makes an output image and draw contours:
__CvSeq *cont = first_contour.ToPointer();
for (; (cont = cont->_cvSequenceFields.__cvTreeNodeFields.h_next.ToPointer()) != null;)
{
PInvoke.cvDrawContours(result.Array, new __CvSeqPtr(cont), new __CvScalar(255, 0, 0), new __CvScalar(0, 0, 0), 0, (int)CVGlobalConsts.CV_FILLED);
CVUtils.CheckLastError();
}
}
PInvoke.cvReleaseMemStorage(ref storage);
CVUtils.CheckLastError();
return(result);
}
public unsafe __CvSeqPtr(__CvSeq *ptr)
{
this.ptr = new IntPtr((void *)ptr);
}
