Fig. 4From: A high sensitivity, low noise and high spatial resolution multi-band infrared reflectography camera for the study of paintings and works on paperComparison among IR reflectogram collected in the spectral band from 2100 to 2400 nm (a), image obtained from applying eq-1 (b), and the second principal component image (c) from the PCA analysis of the three IR reflectogramsBack to article page