color.py 文件源码

def _calc_rgb2lab_min_max():
    """
    :return: ([L_min, a_min, b_min], [L_max, a_max, b_max])
    """
    num_space = 16
    size_image = num_space * num_space * num_space
    values_pixel = numpy.linspace(0, 1, num_space)

    image_array = [[r, g, b] for r in values_pixel for g in values_pixel for b in values_pixel]
    image_array = numpy.vstack(image_array).reshape((1, size_image, 3))

    image_array = rgb2lab(image_array)  # illuminant='D65'
    return image_array.min(axis=1).squeeze(), image_array.max(axis=1).squeeze()