AForge.net边缘检测 - 如何获得边缘点？

Question

我正在使用Aforge对图像进行边缘检测,如何获得检测到的边缘点的x,y？除了循环通过图像位图的明显方式.

这是Aforge样本的代码,但我如何获得边缘点？

    // On Filters->Sobel edge detector
            private void sobelEdgesFiltersItem_Click( object sender, System.EventArgs e )
            {
                // save original image
                Bitmap originalImage = sourceImage;
                // get grayscale image
                sourceImage = Grayscale.CommonAlgorithms.RMY.Apply( sourceImage );
                // apply edge filter
                ApplyFilter( new SobelEdgeDetector( ) );
                // delete grayscale image and restore original
                sourceImage.Dispose( );
                sourceImage = originalImage;

// this is the part where the source image is now edge detected. How to get the x,y for //each point of the edge? 

                sobelEdgesFiltersItem.Checked = true;
            }

Answer 1

过滤器只是顾名思义:过滤器(图像 - >过程 - > NewImage)

我不知道,如果边缘有类似的东西,但AForge有一个角落探测器.我的样本加载图像,运行角点检测器并在每个角落周围显示小红框.(你需要一个名为"pictureBox"的PictureBox控件).

    public void DetectCorners()
    {
        // Load image and create everything you need for drawing
        Bitmap image = new Bitmap(@"myimage.jpg");
        Graphics graphics = Graphics.FromImage(image);
        SolidBrush brush = new SolidBrush(Color.Red);
        Pen pen = new Pen(brush);

        // Create corner detector and have it process the image
        MoravecCornersDetector mcd = new MoravecCornersDetector();
        List<IntPoint> corners = mcd.ProcessImage(image);

        // Visualization: Draw 3x3 boxes around the corners
        foreach (IntPoint corner in corners)
        {
            graphics.DrawRectangle(pen, corner.X - 1, corner.Y - 1, 3, 3);
        }

        // Display
        pictureBox.Image = image;
    }

它可能不是您正在寻找的,但也许它会有所帮助.