Design of an Active Multispectral SWIR Camera System for Skin Detection and Face Verification

Table 3

Signal to noise ratio (SNR) of the ring light illumination for different target distances and ambient lighting conditions.

Distance [m]	Ambient light	SNR [dB]
		935 nm	1060 nm	1300 nm	1550 nm
1.5	Dark	58	66	66	64
	Bright	34	42	42	41
2	Dark	53	62	62	60
	Bright	32	39	38	36
3	Dark	47	57	56	54
	Bright	23	33	32	30
4	Dark	44	53	52	51
	Bright	21	31	30	28

Values marked with have been cut off due to sensor saturation.