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);
}
internal static extern void cvPyrSegmentation(__CvImagePtr src, __CvImagePtr dst, __CvMemStoragePtr storage, __CvSeqPtr comp, int level, double threshold1, double threshold2);
internal static extern void cvPyrSegmentation(__CvImagePtr src, __CvImagePtr dst, __CvMemStoragePtr storage, __CvSeqPtr comp, int level, double threshold1, double threshold2);
/// <summary>
/// Retrieves outer and optionally inner boundaries of white (non-zero) connected
/// components in the black (zero) background
/// </summary>
/// <param name="image"></param>
/// <param name="storage"></param>
/// <param name="first_contour"></param>
/// <returns></returns>
public static int cvFindContours(__CvArrPtr image, __CvMemStoragePtr storage,
out __CvSeqPtr first_contour)
{
unsafe
{
return cvFindContours(
image, storage, out first_contour, sizeof(__CvContour),
CV_RETR.CV_RETR_LIST, CV_CHAIN.CV_CHAIN_APPROX_SIMPLE, new __CvPoint(0, 0));
}
}
/// <summary>
/// Retrieves outer and optionally inner boundaries of white (non-zero) connected
/// components in the black (zero) background
/// </summary>
/// <param name="image"></param>
/// <param name="storage"></param>
/// <param name="first_contour"></param>
/// <param name="header_size"></param>
/// <param name="mode"></param>
/// <param name="method"></param>
/// <returns></returns>
public static int cvFindContours(__CvArrPtr image, __CvMemStoragePtr storage,
out __CvSeqPtr first_contour, int header_size)
{
return cvFindContours(image, storage, out first_contour, header_size, CV_RETR.CV_RETR_LIST, CV_CHAIN.CV_CHAIN_APPROX_SIMPLE, new __CvPoint(0,0));
}
/// <summary>
/// Retrieves outer and optionally inner boundaries of white (non-zero) connected
/// components in the black (zero) background
/// </summary>
/// <param name="image"></param>
/// <param name="storage"></param>
/// <param name="first_contour"></param>
/// <param name="header_size"></param>
/// <param name="mode"></param>
/// <param name="method"></param>
/// <returns></returns>
public static int cvFindContours(__CvArrPtr image, __CvMemStoragePtr storage,
out __CvSeqPtr first_contour, int header_size, CV_RETR mode, CV_CHAIN method)
{
return cvFindContours(image, storage, out first_contour, header_size, mode, method, new __CvPoint(0,0));
}
public static extern int cvFindContours(__CvArrPtr image, __CvMemStoragePtr storage,
out __CvSeqPtr first_contour, int header_size, CV_RETR mode,
CV_CHAIN method, __CvPoint offset);
