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.
Settings adopted to test the tolerance to missing parts in the image, top row corresponds to the first five settings which are referred to as (from left to right) S1, S2, S3, S4 and S4. The second row depicts the random settings which are denoted by (from left to right): RS1, RS2, RS3, RS4 and RS5.
