image_manipulation.py 文件源码

def __pixelate(X, block_height, block_width, h, w, _operator):

    for r in prange(0,h,block_height):
        for c in prange(0, w, block_width):
            m_val = _operator(X[r:r+block_height,c:c+block_width,:], axis=(0,1))
            X[r:r+block_height,c:c+block_width,:] = m_val
    return X.astype(np.uint8)


# from http://www.alanzucconi.com/2015/09/30/colour-sorting/