c＃检测图像中的矩形

我想在下面的图像中检测并获取一个Rects数组，每个矩形一个。 我怎么能在c＃中这样做？

基本上我正在尝试扫描屏幕拍摄的图像并解析窗口数组。

Rect是某种forms的（xloc，yloc，xsize，ysize）返回的数组：rectangles = ParseRects（image）;

Answer 1

您最好的选择是使用AForge.Net库 。

以下代码派生自ShapeChecker类的文档，您可能需要查看文档以进一步熟悉自己。

 static void Main(string[] args) { // Open your image string path = "test.png"; Bitmap image = (Bitmap)Bitmap.FromFile(path); // locating objects BlobCounter blobCounter = new BlobCounter(); blobCounter.FilterBlobs = true; blobCounter.MinHeight = 5; blobCounter.MinWidth = 5; blobCounter.ProcessImage(image); Blob[] blobs = blobCounter.GetObjectsInformation(); // check for rectangles SimpleShapeChecker shapeChecker = new SimpleShapeChecker(); foreach (var blob in blobs) { List edgePoints = blobCounter.GetBlobsEdgePoints(blob); List cornerPoints; // use the shape checker to extract the corner points if (shapeChecker.IsQuadrilateral(edgePoints, out cornerPoints)) { // only do things if the corners form a rectangle if (shapeChecker.CheckPolygonSubType(cornerPoints) == PolygonSubType.Rectangle) { // here i use the graphics class to draw an overlay, but you // could also just use the cornerPoints list to calculate your // x, y, width, height values. List Points = new List(); foreach (var point in cornerPoints) { Points.Add(new Point(point.X, point.Y)); } Graphics g = Graphics.FromImage(image); g.DrawPolygon(new Pen(Color.Red, 5.0f), Points.ToArray()); image.Save("result.png"); } } } } 

原始输入：

结果图像：

Answer 2

您可以看到Hough变换检测线和角点检测。 有些算法可能已经在C＃中实现了