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.
Ordinal grading scores used for each image criterion in the visual image quality assessment
| Grading scores |
|---|
| −2 image on left monitor is better than image on right monitor |
| −1 image on left monitor is probably better than image on right monitor |
| 0 images on left and right monitors are equivalent |
| +1 image on right monitor is probably better than image on left monitor |
| +2 image on right monitor is better than image on left monitor |
