Review of Calibration Methods for Scheimpflug Camera

Table 2

Calibration results of the first imaging system with tilt angle of 7° approximately.

Calibration model	Pinhole (1)	Pinhole (2)	RMM (1)	RMM (2)	PLVM (1)	PLVM (2)	PCIM (1)	PCIM (2)
α (°)	—	—	6.4126	5.5814	6.3463	5.1486	6.2329	5.4688
β (°)	—	—	0.9920	1.7603	0.8197	2.6659	1.2703	2.2456
Cx (pixel)	1986.0064	2099.2407	2055.3751	2098.9543	2058.8085	2121.2302	2049.6208	2140.7542
Cy (pixel)	1883.7801	1935.0271	1978.2631	1869.6842	1984.6398	1784.6398	1974.4682	1776.5569
fx (mm)	48.2265	48.2806	48.2024	48.5231	48.3472	48.4253	48.1954	48.1151
fy (mm)	48.4051	48.4798	48.1955	48.5018	48.3472	48.4253	48.1954	48.1151
k1	−0.0854	−0.0824	−0.0755	−0.0836	−0.0694	−0.0663	−0.0542	−0.0945
k2	0.2769	0.2271	0.0795	0.0725	0.0252	−0.0085	−0.0167	0.4497
k3	—	0.0022	—	−0.0022	—	0.0107	—	−0.9368
k4	—	0.0041	—	0.0098	—	0.0019	—	0.0023
RMSE (pixel)	0.2021	0.1928	0.1701	0.1697	0.1693	0.1690	0.1685	0.1683