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  1. P. Weibring, T. Johansson, H. Edner, S. Svanberg, B. Sundnér, V. Raimondi, G. Cecchi, L. Pantani, “Fluorescence lidar imaging of historical monuments,” Appl. Opt. 40, 6111–6120 (2001).

2001 (1)

Cecchi, G.

Edner, H.

Johansson, T.

Pantani, L.

Raimondi, V.

Sundnér, B.

Svanberg, S.

Weibring, P.

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Figures (2)

Fig. 7
Fig. 7

Simultaneous recording of fluorescence images taken through (a) 448- and (b) 600-nm filters (two-channel method). The image of the ratio I(600 nm)/I(448 nm) is shown in (d). Red corresponds to the highest intensity, yellow and green to successively lower intensities, and blue to the lowest intensities, as indicated in the color bars.

Fig. 10
Fig. 10

False-colored image with pixels superimposed upon a photograph of the northern portal. Areas with different characteristics can be identified. Thus pixels with 12th-century stone characteristics are shown in blue-indigo, and those with 19th-century characteristics are shown in green. The violet pixels correspond to areas that exhibit iron-ion quenching. The normalized chlorophyll pixels from Fig. 8 (in Ref. 1) have been merged in red color tones: Pixels with a large amount of biodeteriogen PC1 are light red, those with a high PC2 score are darker red, and those with low PC1 and PC2 scores are shown in a very dark red color.