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Spectral Bands
The multispectral LANDSAT image used for our application
consists on four spectral bands MSS4, MSS5, MSS6, and MSS7 (MSS : Multispectral
Scanner Subsystem), shown figure 1.
Plateaux can be seen in the upper half, and a plain in the lower half of
the image.
The wavelengths of the spectral bands are the following:
| Band | Wavelengths | Colors |
| MSS4 | from 0.5 to 0.6  m. |
green - yellow |
| MSS5 | 0.6 to 0.7 m. |
orange - red |
| MSS6 | 0.7 to 0.8 m. |
red - near infrared |
| MSS7 | 0.8 to 1.1 m. |
near infrared |
IRIT-UPS