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.
Image processing steps: (I). Defining ROI image; (II). Enhancing contrast ratio; (III). Filtering processing; (IV). The foreground image; (V). Filling the hole; (VI). Removing the noise points; (VII). The contour image; (VIII). The convex hull outline. The scale bar represents 25 μm.
