colorconv.py 文件源码

def _prepare_colorarray(arr):
    """Check the shape of the array and convert it to
    floating point representation.

    """
    arr = np.asanyarray(arr)

    if arr.ndim not in [3, 4] or arr.shape[-1] != 3:
        msg = ("the input array must be have a shape == (.., ..,[ ..,] 3)), " +
               "got (" + (", ".join(map(str, arr.shape))) + ")")
        raise ValueError(msg)

    return dtype.img_as_float(arr)