solver.py 文件源码

def FindExternalContour(image_bw):
  """Returns the largest external contour."""
  # all external contours
  _, contours, _ = cv2.findContours(image_bw.copy(), cv2.RETR_EXTERNAL,
                                    cv2.CHAIN_APPROX_SIMPLE)
  logging.debug("found {} external contours in image".format(len(contours)))
  # max contour by area size
  largest = max(contours, key=lambda cnt: cv2.contourArea(cnt))
  return Rect(*cv2.boundingRect(largest))