1 Subjects: “...spectral feature subset selection...”

2 Subjects: “...spectral signatures...”

3 Subjects: “...spectral sensor...”

4 Subjects: “...spectral measure of coherence...”

5 Subjects: “...spectral bands...”

6 Subjects: “...spectral ratio...”

7 “.... The data obtained through remote sensing systems with varied spatial, spectral, and temporal resolutions...”

8 “..., aerial images, as well as data from passive and active sensors of different spatial, spectral...”

9