Calculating static "HUD" video parts

[Couleur]

In a previous post (https://forum.doom9.org/showthread.php?t=184113) I discussed about replacing certain parts of a video which were static to the original with a black and white mask for some filters which have artifacts (e.g mv.Flowblur, SVPFlow and other frame interpolation techniques)

How would one go about averaging the pixels of each frame to analyze which one changes less to produce these masks automatically? It could be faster/more accurate depending on the percentage of a video's frames it checks

https://i.imgur.com/xfz2gSX.png

[Selur]

Maybe try an inverted motion mask. (https://github.com/dubhater/vapoursynth-motionmask)

[Couleur]

Maybe try an inverted motion mask.


https://github.com/HomeOfAviSynthPlusEvolution/DelogoHD
https://forum.doom9.org/showthread.php?t=176658
got pointed to the opposite kind of process, also something to consider

thank you 👍