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.
An intact version of the image in Fig. 1. When the intact version is presented just once directly after presentation of the degraded version, the ability to later identify the degraded image is greatly improved, even after many months. Reprinted from ref. (42), which is licensed under CC BY 4.0.
