Fig. 7.
Results of the fractional spectral indexes of sub-images. (a) . (b) . (c) . (d) .
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.