Image Processing Reference
In-Depth Information
Figure1.18 Early 19th century headstone with staining and lichen growth: left—VIS;
right—780-1100 nm.
Figure1.19 The author in a loud and admittedly tacky shirt made of rayon: left —VIS;
right—NIR (780-1100 nm).
Art conservationists, like criminologists, are concerned about authentication
and identification. They use near-IR imaging to image through visibly opaque
but infrared-transparent materials, like the age-darkened varnish on some old
paintings. Figure 1.20 shows three views of a painting by Otto Marseus entitled
Natura, which is displayed in the Galleria Palatina in Florence. The full painting is
shown in the top image, with the red box in the lower left corner corresponding
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