我无法使用python打印图像的像素值

Question

我正在尝试使用python计算光栅图像的像素，我在网站上找到了以下代码：

path4 = "./bmp.bmp"
brownbox= cv2.imread(path4)
brownkbox=cv2.resize(brownbox, (0,0), fx=0.5, fy=0.5)
brownbox2_gray= cv2.cvtColor(brownbox, cv2.COLOR_BGR2GRAY)
cv2.imshow("gray",brownbox2_gray)
cv2.waitKey(0)

rows,cols = brownbox2_gray.shape
for i in range(rows):
    for j in range(cols):
        k = img[i,j]
        print (k)

k values are not being printed? only the images are shown

Answer 1

import numpy as np 
from PIL import Image

i = Image.open('name of your jpg.jpg')
array = np.asarray(i)
print(array)