python opencv。我想获得 r=b=g 的像素值

Question

img = cv2.imread('/home/Desktop/image/findgray1.jpg')
b = 0
g = 0
r = 0
count = 0
for i in range (img.shape[0]): 
    for j in range (img.shape[1]):
        for c in range(img.shape[2]):
            if img[i][j]==[[b],[g],[r]]:
                count+=1
                b+=1
                g+=1
                r+=1
print(count)

这是我的代码。我想获取 r=g=b 的像素值，例如:(0,0,0),(1,1,1).......(255,255,255) 值。

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

Answer 1

此代码运行无误并计算灰色像素:

import cv2

img = cv2.imread('test.png')
count = 0
for i in range(img.shape[0]):
    for j in range(img.shape[1]):
        if img[i][j][0] == img[i][j][1] == img[i][j][2]:
            count+=1

print count