_, thresh = cv2.threshold(
img, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)
# 使用cv.RETR_CCOMP寻找轮廓
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_CCOMP, 2)
# 绘制轮廓内部
cv2.drawContours(img, contours, i, 255, -1)
_, thresh = cv2.threshold(
img, 0, 255, cv2.THRESH_BINARY + cv2.THRESH_OTSU)
# 使用cv.RETR_CCOMP寻找轮廓
contours, hierarchy = cv2.findContours(thresh, cv2.RETR_CCOMP, 2)
# 绘制轮廓内部
cv2.drawContours(img, contours, i, 255, -1)