opencv椭圆检测python代码

可以参考以下代码：

import cv2

img = cv2.imread("image.jpg")
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
gray = cv2.GaussianBlur(gray, (5, 5), 0)

edges = cv2.Canny(gray, 50, 150, apertureSize=3)
cv2.imshow("edges", edges)

circles = cv2.HoughCircles(edges, cv2.HOUGH_GRADIENT, dp=1, minDist=20, param1=50, param2=30, minRadius=0, maxRadius=0)

if circles is not None:
circles = np.round(circles[0, :]).astype("int")

for (x, y, r) in circles:
cv2.circle(img, (x, y), r, (0, 255, 0), 4)

cv2.imshow("circles", img)
else:
print("No circles found")

cv2.waitKey(0)
cv2.destroyAllWindows()