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.
Summary preference functions for the two factors resulting from the Q-mode principal component analysis for the grayscale (A), thresholded (B), edges (C), mountain (D) and terrain images (E) respectively. Percentages in each panel indicate the proportion of variance explained by each factor.
