Table 2.

The number of point groups, interpolations points, and planes for cases 1–6.

Case	Calibration Plane	M	N	Interpolation Point	Interpolation Plane
Case 1	30 $\times$30	35244	47	35244	34846
Case 2	40 $\times$40	19899	84	19899	19600
Case 3	50 $\times$ 50	12880	132	12880	12640
Case 4	60 $\times$ 60	8844	190	8844	8645
Case 5	80 $\times$ 80	5050	337	5050	4900
Case 6	100 $\times$ 100	3240	527	3240	3120