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 length-scale analysis with the multiple low-pass filter technique applied to check board patterns. All check boards have the same dimensions and total heterogeneity with size of white and black squares increasing from top to bottom.
