def paste_image(src, dest, mask, x, y):
    src = src.astype('int32')
    dest = dest.astype('int32')
    w, h, d = mask.shape
    tmp = dest[x: x + w, y: y + h]
    tmp[mask > 0] = 0
    tmp = tmp | src
    dest[x: x + w, y: y + h] = tmp
    return dest