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我正在尝试向图像添加随机噪声。当我尝试打印图像的形状时，它似乎可以正确打印，但是出现此错误，提示“'NoneType' 对象没有属性'shape'”

平台：Ubuntu 16.04；Python 版本：3.7.3；Opencv 版本：4.1.0

 def rand_noise(image,prob):

    print("Check",image.shape)
    output = np.zeros(image.shape,np.uint8)
    thres = 1 - prob 
    for i in range(image.shape[0]):
        for j in range(image.shape[1]):
            rdn = random.random()
            if rdn < prob:
                output[i][j] = 0
            elif rdn > thres:
                output[i][j] = 255
            else:
                output[i][j] = image[i][j]
    return output

删除打印功能后，下一行显示相同的错误。

这是错误消息：

Check (720, 1280, 3)
Traceback (most recent call last):
  File "noise&blur.py", line 71, in <module>
    noise_imgR = sp_noise(imageR,0.005)
  File "noise&blur.py", line 11, in sp_noise
    print("Check",image.shape)
AttributeError: 'NoneType' object has no attribute 'shape'
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