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.
Images obtained at a speed of 118,000 rpm—original images recorded by a camera (top images: (a) 1st frame, (b) 2 frames later, (c) 6 frames later) and images obtained after using the edge Laplacian filter (bottom images: (A) 1 st frame, (B) 2 frames later, (C) 6 frames later).
