blur后进行检测
检测原图
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
image.png
