dense optical flow algorithm about jsfeat HOT 1 OPEN

Hey @hellochar, I don't think the code you linked implements a dense optical flow algorithm. Actually, it seems like it uses Lucas-Kande which jsfeat has already implemented here with the demo here.

With that being said, dense optical flow algorithms such as Gunner Farneback's algorithm tend to run very slow using only the CPU because they, in short, calculate flow for all of the pixels instead of only some as is the case with sparse optical flow algorithms. Check out this page for an example using OpenCV. However, dense optical flow algorithms can actually run close to real-time if you offload the calculations to a GPU. If you intend to implement your own, in JavaScript, might I suggest using Three-js and check out the WebGL examples.

from jsfeat.