Review of Calibration Methods for Scheimpflug Camera

Table 3

Calibration results of the second imaging system with tilt angle of 10° approximately.

Calibration model	Pinhole (1)	Pinhole (2)	RMM (1)	RMM (2)	PLVM (1)	PLVM (2)	PCIM (1)	PCIM (2)
α (°)	—	—	9.2544	3.0078	9.1981	2.9987	9.0974	4.6926
β (°)	—	—	−0.9193	0.0248	1.0680	−0.0337	268.2745	261.3949
Cx (pixel)	1011.6078	1015.8023	1017.8545	1010.8408	1014.2669	1011.9323	1014.2182	1009.2238
Cy (pixel)	950.4627	373.6203	945.0634	439.4258	921.0598	684.9546	907.9720	424.2683
fx (mm)	25.2562	25.8743	26.3688	26.1073	26.4134	26.1090	26.4266	26.3146
fy (mm)	29.1527	27.1610	26.0862	26.1204	26.4134	26.1090	26.4266	26.3146
k1	−0.0643	−0.0023	−0.0695	0.0010	−0.0748	0.0003	−0.0454	0.0011
k2	0.8235	−1.2101	0.6203	−1.4850	0.8104	−1.4587	0.6705	−1.4361
k3	—	0.0046	—	0.0044	—	0.0044	—	0.0005
k4	—	0.0005	—	0.0004	—	0.0002	—	0.0089
RMSE (pixel)	0.1556	0.1548	0.1076	0.1071	0.1078	0.1076	0.1080	0.1078