| public static FindContoursAsMat ( InputOutputArray image, RetrievalModes mode, ContourApproximationModes method, Point offset = null ) : MatOfPoint[] | ||
| image | InputOutputArray | Source, an 8-bit single-channel image. Non-zero pixels are treated as 1’s. /// Zero pixels remain 0’s, so the image is treated as binary. /// The function modifies the image while extracting the contours. |
| mode | RetrievalModes | Contour retrieval mode |
| method | ContourApproximationModes | Contour approximation method |
| offset | Point | Optional offset by which every contour point is shifted. /// This is useful if the contours are extracted from the image ROI and then they should be analyzed in the whole image context. |
| return | MatOfPoint[] | |
public static MatOfPoint[] FindContoursAsMat(InputOutputArray image,
RetrievalModes mode, ContourApproximationModes method, Point? offset = null)
{
if (image == null)
throw new ArgumentNullException(nameof(image));
image.ThrowIfNotReady();
Point offset0 = offset.GetValueOrDefault(new Point());
IntPtr contoursPtr;
NativeMethods.imgproc_findContours2_OutputArray(image.CvPtr, out contoursPtr, (int)mode, (int)method, offset0);
image.Fix();
using (var contoursVec = new VectorOfMat(contoursPtr))
{
return contoursVec.ToArray<MatOfPoint>();
}
}
#endregion