Official websites use .gov
A
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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.
Gaussian smoothing filtered result with a pre histogram equalized image: (a) USAF chart image with combined histogram equalization and Gaussian weighted filter; (b) histogram comparison between before (blue solid line) and after (red dotted line) image processing.
