Figure 9.
Convert process of original image. (a) Original image; (b) crop image; (c) gray-scale image; (d) binary image.
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.