[Solved] C# – how to find a laser spot in two photos? [closed]

To simplify your problem, You want to compare two images.

Here is the first link which compares the images and looks for rate of similarity
https://github.com/cameronmcefee/Image-Diff-View-Modes/commit/8e95f70c9c47168305970e91021072673d7cdad8

You could also look at Viisage FaceExplorer, and Lead Tools which serve these functions.