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.
Mean chromaticities for the images or illuminants (open circles) from the 4 different environments. Image means are shown separately for earth (filled triangles) and sky (open triangles) regions or for the equally weighted regions (filled circles).
