Fig. 5
From: From RGB camera to hyperspectral imaging: a breakthrough in Neolithic rock painting analysis
Statistics on the spectra of the reference target (~ 2700 pixels) with mean (black), mean ± standard deviation (green), min and max values (red) showing the increasing noise below 410 nm and above 920 nm. Only the central part of the spectrum (dashed lines: 410–920 nm) with standard deviation < 5% is kept for the hyperspectral data analysis
