private IEnumerable<KeyPoint> FindFeatures_HarrisCornerDetector(string filename) { using (var src = new Mat(filename, ImreadModes.GrayScale)) { // find ínteresting corners Point2f[] corners = src.GoodFeaturesToTrack(100, 0.01, 100, null, 15, true, 1); IEnumerable<KeyPoint> keypoints = corners.Select(s => new KeyPoint(s, 100)); return keypoints; } }