Looking for Sample that renders flow vectors

I can run AppOFCuda with --visualFlow and I get output images where every pixel is colored to show how much movement was detected, which is cool, but it is also quite noisy. Does anyone know if there’s a sample that creates the UI that I see in this DRIVE labs blog where it is overlaying the video with some key movement vectors? Is there a confidence interval on flow vectors so you can remove noisy vectors?