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.
The software interface used to establish the ground truth. The left pane shows the 2D flattened colon surface where the shadow effect is visualized by the normal directions at the vertices in the original 3D colon surface. The right pane shows the 3D colon surface. In both panes, the fold boundaries from experts are in blue color, and the areas inside the boundaries are green color. The arrow-pointed red folds in left and right panes indicate a matched pair in 2D and 3D.
