Table 8. Impact of color variations on range measurements.

Color	Scanner	Mean Value	Standard Deviation	Relative Error	RMSE
		${\stackrel{-}{\mathit{x}}}_{\mathit{M}}$(mm)	${\stackrel{-}{\mathit{\sigma }}}_{\mathit{M}}$(mm)	${\stackrel{-}{\mathit{\eta }}}_{\mathit{M}}$(%)	(mm)
Red	URG-04LX	3985.2	11.5	-0.35	16.2
	RPLidar A1	4019.3	15.4	0.58	19.6
	UTM-30LX	3995.6	7.8	-0.12	5.1
Blue	URG-04LX	3988.4	10.7	-0.31	13.6
	RPLidar A1	4029.1	12.4	0.77	27.4
	UTM-30LX	4006.7	6.3	0.15	7.3
White	URG-04LX	3992.1	12.3	-0.18	8.7
	RPLidar A1	4021.3	17.6	0.61	21.8
	UTM-30LX	3994.9	7.8	-0.13	5.2
Green	URG-04LX	3985.8	11.2	-0.35	15.1
	RPLidar A1	4023.1	14.8	0.63	23.4
	UTM-30LX	3999.2	8.7	-0.03	1.1