查找并为行人穿越

Question

我有一项任务，我需要在图片中在Python中找到行人交叉，并将其涂成红色。

    import cv2
import numpy as np

# Let's load a simple image with 3 black squares
image = cv2.imread('crosswalk.jpg')
cv2.waitKey(0)

# Grayscale
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
cv2.imshow('Gray', gray)
cv2.waitKey(0)

edged = cv2.Canny(gray, 161, 550)

# Finding Contours


contours, hierarchy = cv2.findContours(edged,
                                       cv2.RETR_LIST, cv2.CHAIN_APPROX_NONE)


cv2.imshow('Canny Edges After Contouring', edged)
cv2.waitKey(0)
print("Number of Contours found = " + str(len(contours)))


cv2.drawContours(image, contours, -1, (0, 0, 255), 1)



cv2.imshow('Contours', image)
cv2.waitKey(0)
ret, thresh1 = cv2.threshold(gray, 80, 255, cv2.THRESH_BINARY_INV)
cv2.imshow('Binary Threshold', thresh1)

cv2.waitKey(0)
cv2.destroyAllWindows()

这是我的代码，现在我处于此级别。

我如何将轮廓降低到所需区域并为红色染色？

谢谢