internal static extern ContourScanner cvStartFindContours(
Arr image,
MemStorage storage,
int header_size,
ContourRetrieval mode,
ContourApproximation method,
Point offset);
internal static extern Seq cvApproxChains(
Seq src_seq,
MemStorage storage,
ContourApproximation method,
double parameter,
int minimal_perimeter,
int recursive);
internal static extern int cvFindContours(
Arr image,
MemStorage storage,
out Seq first_contour,
int header_size,
ContourRetrieval mode,
ContourApproximation method,
Point offset);
