Table 2.

Statistic of the measurement error of a standard ball.

Statistics	Monochromatic Fringes	WRGB Fringes	Results of the Method in Reference [18]	Results of the Method in This Research
Max error	0.124 mm	0.229 mm	0.155 mm	0.150 mm
Std. dev.	0.021 mm	0.045 mm	0.036 mm	0.027 mm
Radius error	0.100 mm	0.110 mm	0.103 mm	0.100 mm