may.py

# 存放可能用到的函数
# def hull_length(cnt):     #用于计算轮廓凸包长度
#     hull = cv2.convexHull(cnt)
#     length = len(hull)
#     return length

# def maxAndSubMax(cnt):    #采用分治法计算轮廓中最大和次大轮廓
#     if len(cnt) == 1:
#         return cnt[0], cnt[0]
#     if len(cnt) == 2:
#         if hull_length(cnt[0]) > hull_length(cnt[1]):
#             return cnt[0], cnt[1]
#         else:
#             return cnt[1], cnt[0]
#
#     x1L, x2L = maxAndSubMax(cnt[:len(cnt) // 2])
#     x1R, x2R = maxAndSubMax(cnt[len(cnt) // 2:])
#
#     if hull_length(x1L) > hull_length(x1R):
#         if hull_length(x2L) > hull_length(x1R):
#             return x1L, x2L
#         else:
#             return x1L, x1R
#     else:
#         if hull_length(x1L) > hull_length(x2R):
#             return x1R, x1L
#         else:
#             return x1R, x2R