EmguCV Canny黑色窗口

Question

我还有一个问题。 Idk发生了什么事buti试图使Canny边缘检测器。问题是，当我想检测像方形这样的简单形状的边缘时，程序能够检测到它。但是当我想要在不是很简单的图像程序上检测形状时，只会给我填充只有黑色的图像。你们有什么想法吗？

我用下面这段代码：

public Bitmap CannyEdge(Bitmap bmp) 
    { 
     Image<Gray, Byte> Cannybmp; 
     Image<Gray, Byte> GrayBmp; 
     Image<Bgr, Byte> orig = new Image<Bgr, Byte>(bmp); 
     Image<Bgr, Byte> imgSmooth; 
     Bitmap output; 

     imgSmooth = orig.PyrDown().PyrUp(); 
     imgSmooth._SmoothGaussian(3); 
     GrayBmp = imgSmooth.Convert<Gray, byte>(); 

     Gray grayCannyThreshold = new Gray(160.0); 
     Gray grayThreshLinking = new Gray(80.0); 

     Cannybmp = GrayBmp.Canny(grayCannyThreshold.Intensity, grayThreshLinking.Intensity); 
     output = Cannybmp.ToBitmap(); 

     //int a = 5; 
     return output; 

    } 

private void button1_Click(object sender, EventArgs e) 
    { 
     Bitmap bmp = new Bitmap(pictureBox1.Image); 
     pictureBox2.Image = CannyEdge(bmp); 
    } 

Answer 1

你尝试设置您的grayCannyThreshold成为较小的grayThreshLinking的价值？

Gray grayCannyThreshold = new Gray(80.0); 
Gray grayThreshLinking = new Gray(160.0);