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.
Observations of an individual slice of a tooth with proximal enamel caries before and following processing using various filter options and colourization: (a, g) original image; (b, h) gaussian blur filtering; (c, i) block-matching and three-dimensional filtering; (d, j) median filtering; (e, k) total variation filtering; (f) regions of interest (ROIs).
