INNER CODE UNIT · Python

a23

NVlabs/instant-ngp · scripts/flip/__init__.py:58

        a23 = 887015   / 12288897
        a31 = 1425312  / 73733382
        a32 = 8788810  / 73733382
        a33 = 70074185 / 73733382
        A = np.array([[a11, a12, a13],
                        [a21, a22, a23],
                        [a31, a32, a33]])

        input_color = np.transpose(input_color, (2, 0, 1)) # C(H*W)
        if fromSpace2toSpace == "xyz2linrgb":
            A = np.linalg.inv(A)
        transformed_color = np.matmul(A, input_color)
        transformed_color = np.transpose(transformed_color, (1, 2, 0))

    elif fromSpace2toSpace == "xyz2ycxcz":
        reference_illuminant = color_space_transform(np.ones(dim), 'linrgb2xyz')
        input_color = np.divide(input_color, reference_illuminant)
        y = 116 * input_color[1:2, :, :] - 16

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