Geometric Evaluation of Mobile-Phone Camera Images for 3D Information

Table 4

Results of self-calibration of the Galaxy S4 camera for target-based and targetless cases.

Case	Focal length, c () mm	x0 () mm	y0 () mm	r = 1.50 mm μm	r = 2.50 mm μm	P (r) r = 1.50 mm μm	P (r) r = 2.50 mm μm	RMS No. of pts
Target-based	4.2100 (0.0010)	0.0623 (0.0018)	−0.0295 (0.0016)	−15.82	−26.09	0.32	0.88	0.33 pixel 75
Targetless	4.2120 (0.0005)	0.0613 (0.0003)	−0.0283 (0.0003)	−14.91	−22.01	0.38	1.07	0.60 pixel 32000