Figure 3.

M⁽¹⁾ versus Y_k plot after the first stage normalization. Here, we can see reduction of bias for background intensity graphically (See Figure 2). Also, the correlation coefficient of each Y_k decreased. The values are -0.0067, -0.0545, -0.0314, 0.2302, -0.0048, 0.0012, 0.0654, -0.0416, and -0.0297, respectively.