Multispectral imaging (MSI)

Multispectral imaging (MSI) has been used in many scientific and industrial applications such as space exploration, remote sensing, medical diagnosis, etc. One of interesting applications of MSI is study and preservation of cultural heritage including artworks and ancient manuscripts. The advantage of the MSI is that it is able to analyze the data on different wavelengths even outside the visible spectrum which may be hidden to human eye. MSI is very useful in extraction of text from historical manuscripts and palimpsests. MS images also provide more legible views of fainted manuscripts. Using high resolution cameras, the MSI is able to produce multi-band sharp images even of texts with very thin strokes. The MS images can be used to differentiate texts written with different ink types, even if they are indistinguishable to human eye. These images are the basis for spectral features that can be used in classification steps in the succeeding process.

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