opencv-python cv2.imread() 返回一个 NoneType [英] opencv-python cv2.imread() return a NoneType

问题描述

我尝试使用 cv2.imread('~/Download/image.jpg') 读取图像，但它总是返回 NoneType.看来这个函数不能读取任何图像.我很确定这条路是正确的.有人知道吗?谢谢

I try to use cv2.imread('~/Download/image.jpg') to read an image, but it always returned a NoneType. It seems that this function can not read any image. I am pretty sure that the path is right. Does anyone know something? Thanks

推荐答案

filename 参数需要是绝对/相对路径，所以，你需要使用 /home/username/ 代替~.

检查 imread 文档.

如果需要使用~，可以试试expanduser:

If you need to use ~, you can try expanduser:

from os.path import expanduser
filename = expanduser("~") + '/Download/image.jpg'
img = cv2.imread(filename)

Python3.6

from pathlib import Path
filename = f'{str(Path.home())}/Download/image.jpg'
img = cv2.imread(filename)

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