Figure 3.
Examples of poor quality images: (a) shadows and intense reflections, (b) haze, (c) arc and specular reflections, and (d) blur.
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.