Figure 6.
Central projection for crack reconstruction: (a) central projection model; (b) coordinate transformation on the main image; and (c) projection point calculation.
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.