Python代码库OpenCV之10圆检测circle dete

blur后进行检测

检测原图

代码

import cv2
import numpy as np

filename="D:\\pythondev\\dev\\opencv\\img\\circle.png"
image = cv2.imread(filename)
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

blur = cv2.medianBlur(gray, 5)
#circles = cv2.HoughCircles(gray, cv2_HOUGH_GRADIENT, 1, 10)

circles = cv2.HoughCircles(blur, cv2.HOUGH_GRADIENT, 1.5, 10)
circles = np.uint16(np.around(circles))

for i in circles[0,:]:
    # draw the outer circle
    cv2.circle(image,(i[0], i[1]), i[2], (255, 0, 0), 2)
    # draw the center of the circle
    cv2.circle(image, (i[0], i[1]), 2, (0, 255, 0), 5)

cv2.imshow('detected circles', image)
cv2.waitKey(0)
cv2.destroy All Windows()

运行效果

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