(a) a row of matrix Φ (x = 1, 2, …, 800, y = 500), (b) a row of matrix Φ 1 (c) a row of matrix ( Φ mask − 5 1000 · Φ ) A I † A I ; (d) Q value versus radius r based on the results obtained in Fig. 3. The black solid curve shows the relationship between reconstruction image Q and radius r.