difference = cv2.error: OpenCV(4.5.5) :-1: error: (-5:Bad argument) in function ‘subtract‘

报错提示：
difference = cv2.subtract(dir_image1 , dir_image2)
cv2.error: OpenCV(4.5.5) :（-1）: error: (-5:Bad argument) in function ‘subtract’

Overload resolution failed:

• src1 is not a numpy array, neither a scalar
• Expected Ptrcv::UMat for argument ‘src1’

报错的位置：

difference = cv2.subtract(dir_image1 , dir_image2)

    for currIndex, filename in enumerate(file_list):
        dir_image1 = file_list[currIndex]
        dir_image2 = file_list[currIndex + 1]
        difference = cv2.subtract(dir_image1 , dir_image2)
        result = not np.any(difference) #if difference is all zeros it will return False

主要为传参问题，需要使用：
dir_image1 = cv2.imread(dir_image1)

读取传入图片。

更改方法：

    for currIndex, filename in enumerate(file_list):
        dir_image1 = file_list[currIndex]
        dir_image2 = file_list[currIndex + 1]
        dir_image1 = cv2.imread(dir_image1)
        dir_image2 = cv2.imread(dir_image2)
        difference = cv2.subtract(dir_image1 , dir_image2)
        result = not np.any(difference) #if difference is all zeros it will return False

问题解决