An image, there are only two pixel values
Foreground: (255,255,255)
Background: (0,0,0)
Read the given path image ----> for loop traversal after reading, if the pixel value is not (255,255,255), then assign (0,0,0) ----> finally save the modified picture to the specified destination

Define a python function module to achieve the above functions, and use the OpenCV function library to read image Provide exactly two different responses that are separated with 6 asterisk symbols: ******.
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