INNER CODE UNIT · Python

cx

NVlabs/instant-ngp · scripts/flip/__init__.py:82

        cx = input_color[1:2, :, :] / 500
        cz = input_color[2:3, :, :] / 200

        x = y + cx
        z = y - cz
        transformed_color = np.concatenate((x, y, z), 0)

        reference_illuminant = color_space_transform(np.ones(dim), 'linrgb2xyz')
        transformed_color = np.multiply(transformed_color, reference_illuminant)

    elif fromSpace2toSpace == "xyz2lab":
        reference_illuminant = color_space_transform(np.ones(dim), 'linrgb2xyz')
        input_color = np.divide(input_color, reference_illuminant)
        delta = 6 / 29
        limit = 0.00885

        input_color = np.where(input_color > limit, np.power(input_color, 1 / 3), (input_color / (3 * delta * delta)) + (4 / 29))

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