def filter_point(point: int) -> int:
    """Filter a point.

    If point is below threshold, divide it by divisor. If above, multiple it by
    multiplier. This is a crude but effective way of skewing an image to
    black-and-white without actually thresholding it.

    """
    if point < 160:
        return round(point / 1.2)
    else:
        return round(point * 2)