在opencv-python中检测星形

我需要检测形状并计算图像中每个形状的出现.我最初检测到轮廓并对它们进行近似,并计算每个轮廓中的顶点.我的代码如下所示：

import cv2import numpy as np import collectionsimport sysimg = cv2.imread(str(sys.argv[1]),0)ret,thresh = cv2.threshold(img,127,255,0)contours,hIErarchy = cv2.findContours(thresh,1,2)no_of_vertices = []i = 0mask = np.zeros(img.shape,np.uint8)for contour in contours: cnt = contour area = cv2.contourArea(cnt) if area>150:    epsilon = 0.02*cv2.arcLength(cnt,True)    approx = cv2.approxpolyDP(cnt,epsilon,True)    no_of_vertices.append(len(approx))counter = collections.Counter(no_of_vertices) a,b = counter.keys(),counter.values() i=0 while i

我的代码不能用于检测此图像中的星星：

我应该在代码中做出哪些更改？

#include "stdafx.h"#include