colorimetry.py 文件源码

def uvprime_to_xy(uv):
    ''' Converts u' v' points to xyY x,y points.

    Args:
        uv (`numpy.ndarray`): ndarray with last dimension corresponding to
            u', v'.

    Returns:
        `tuple` containing:

            `numpy.ndarray`: x coordinates.

            `numpy.ndarray`: y coordinates.

    '''
    uv = np.asarray(uv)
    u, v = uv[..., 0], uv[..., 1]
    x = (9 * u) / (6 * u - 16 * v + 12)
    y = (4 * v) / (6 * u - 16 * v + 12)

    shape = x.shape
    return np.stack((x, y), axis=len(shape))