pydicom_PIL.py 文件源码

def get_LUT_value(data, window, level):
    """Apply the RGB Look-Up Table for the given data and window/level value."""
    if not have_numpy:
        raise ImportError("Numpy is not available. See http://numpy.scipy.org/"
                          " to download and install")

    return np.piecewise(data,
                        [data <= (level - 0.5 - (window - 1) / 2),
                         data > (level - 0.5 + (window - 1) / 2)],
                        [0, 255, lambda data: ((data - (level - 0.5)) /
                         (window - 1) + 0.5) * (255 - 0)])