[CV] OpenCV图像处理教程- 22:Hough circle transformation

 

 

 

 dp = 1:原图;dp=2:小一半的图

 param2选30-50,超过这个值

OpenCV中的霍夫变换圆检测函数 cv::HoughCircles:

它整合了Canny检测和霍夫变换,输出是cv::Vec3f向量,每个元素包含检测圆的圆心坐标和半径(cx, cy, radius)。

如果噪声不是椒盐噪声就可以不用median blur,可以用gaussian blur等等 

 

 

hough circles参数

1:dp

(5)10:min_dist: Minimum distance between detected centers

(6)100:Upper threshold for the internal Canny edge detector

(7)30:Threshold for center detection

(8)5:min radius

(9)50:max radius

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转载自www.cnblogs.com/ecoflex/p/10842282.html