Table 2.

Comparison of projector calibration.

Method of calibration	Rely on camera calibration	Camera error	Projector error	Number of pictures projected	Additional equipment
			Mean error
Falcao’s method	Yes	0.5	0.8671	0	No
Zhang S’s method	No	0	0.2176	6	No
Li Z W’s method	No	0	0.312	24	No
Huang S J’s method	No	0	0.0704	24	Yes
JI H B’s method	No	0	0.1329	16	No
mine	No	0	0.0911	9	No