應用hough變換後在圖像上繪製圓圈？

Question

我正在使用HorgeCircleTransformation類的AForge來檢測圓。我想在檢測到圓圈的圖像上繪製圓圈（以突出顯示原始圖像上的圓圈）。我如何修改'foreach循環'來做到這一點？

public Bitmap hough(Bitmap bmp) 
    { 
     HoughCircleTransformation circleTransform = new HoughCircleTransformation(35); 
     // apply Hough circle transform 
     circleTransform.ProcessImage(bmp); 
     Bitmap houghCirlceImage = circleTransform.ToBitmap(); 
     // get circles using relative intensity 
     HoughCircle[] circles = circleTransform.GetCirclesByRelativeIntensity(0.5); 
     int numCircles = circleTransform.CirclesCount; 
     MessageBox.Show("Number of circles found : " + numCircles.ToString()); 
     foreach (HoughCircle circle in circles) 
     { 

      //code to draw circle 
     } 
     return bmp; 
    } 

Answer 1

你有X，Y和半徑。

要在位圖上使用System.Drawing.Graphics。

例如

var g = Graphics.FromBitmap(bmp); 
    g.DrawEllipse(...);