Classes referring to cultures, such as Cotton (Gossypium hirsutum), Pearl millet (Pennisetum glaucum), “green” and “dried” corn (Zea mays), have a variable spectral behavior depending on its' maturation state. As for the class Water, the increase of its' reflectance, especially in the near infrared (band 3), is caused by suspended materials and by the low depth of it, because the scene was captured during the dry season. At the former figure one can observe that the best discrimination between the different targets found in the field is possible with band 4 (1600-1700 nm), i.e. at the middle infrared.
On the other hand, there is an increase of reflectance at band 9 for all classes, which is not a typical behavior of the targets, because there should be a lower or similar reflectance at all other SWIR bands. This behavior can be explained by the cross- talk phenomenon.
Classes referring to cultures, such as Cotton (Gossypium hirsutum), Pearl millet (Pennisetum glaucum), “green” and “dried” corn (Zea mays), have a variable spectral behavior depending on its' maturation state. As for the class Water, the increase of its' reflectance, especially in the near infrared (band 3), is caused by suspended materials and by the low depth of it, because the scene was captured during the dry season. At the former figure one can observe that the best discrimination between the different targets found in the field is possible with band 4 (1600-1700 nm), i.e. at the middle infrared.On the other hand, there is an increase of reflectance at band 9 for all classes, which is not a typical behavior of the targets, because there should be a lower or similar reflectance at all other SWIR bands. This behavior can be explained by the cross- talk phenomenon.
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