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. 2023 Feb 7;23(4):1871. doi: 10.3390/s23041871

Figure 9.

Figure 9

Figure 9

The calibration of the TSS sensor for different light sources: (a) IR light, (b) red light, (c) green light, and (d) blue light. Blue squares represent the calibration data. The blue line is the mathematical model, the green lines are the confidence interval, and the grey lines are the prediction interval.