Question

我正在尝试使用OpenCvSharp库将Point2f []转换为Mat []，并且不知道从哪里开始。一些帮助将不胜感激。

rect = cv2.minAreaRect(c)
box = np.int0(cv2.cv.BoxPoints(rect))

这是我试图转换为OpenCvSharp的代码 Detect barcodes in python

这是我第一次使用OpenCvSharp，所以我可以在链接页面中做所有事情，除了我所包含的行。

Answer 1

我认为这是您要查找的IEnumerable<IEnumerable<Point>>超载，而不是基于Mat的超载。

我能够通过Select作为Point.Point并将其包装在虚拟数组中。这是使用链接中的示例图片的整个代码：

// Using NuGet package OpenCvSharp-AnyCPU 2.4.10.20140320. 
var image = Cv2.ImRead("barcode_01.jpg");
var gray = image.CvtColor(OpenCvSharp.ColorConversion.BgraToGray);
var gradX = gray.Sobel(MatType.CV_32F, 1, 0, -1);
var gradY = gray.Sobel(MatType.CV_32F, 0, 1, -1);
var gradient = gray.EmptyClone();
Cv2.Subtract(gradX, gradY, gradient);
Cv2.ConvertScaleAbs(gradient, gradient);         
var kernel = Cv2.GetStructuringElement(StructuringElementShape.Rect, new Size(21, 7));
var closed = (gradient.Blur(new Size(9,9)).Threshold(225, 255, OpenCvSharp.ThresholdType.Binary)).MorphologyEx(OpenCvSharp.MorphologyOperation.Close, kernel);            
Mat[] contours;
var hierarchy = InputOutputArray.Create(new List<Vec4i>());            
closed.Erode(kernel, null, 4).Dilate(kernel, null, 4).FindContours(out contours, hierarchy, OpenCvSharp.ContourRetrieval.External, OpenCvSharp.ContourChain.ApproxSimple);            
var c = contours.ToList().OrderByDescending(mat => mat.ContourArea(false)).FirstOrDefault();
if (c != null)
{
    var rect = Cv2.MinAreaRect(c);
    var box = new[] { rect.Points().Select(p2f => new Point(p2f.X, p2f.Y)) };
    Cv2.DrawContours(image, box, -1, new Scalar(0, 255, 0), 3);
    image.SaveImage(@"out.png");
}

将Point2f []转换为Mat [] OpenCV

1 个答案: