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.
Example of symmetry search for a palm-tree pattern. A and B show cross-correlation patterns for rotation and mirror symmetry, respectively. The pattern was rotated by . Mirror symmetry was tested along the vertical axis of the pattern after the rotation. (C) Maximum cross-correlation plot for to rotation. is only shown for the range containing maximum variations.
