It's more than just a frame to frame brightness difference. AIUI epilleptic triggers are more dependent on frequency of change over some period of time. As well

It's more than just a frame to frame brightness difference. AIUI epilleptic triggers are more dependent on frequency of change over some period of time. As well as the absolute brightness difference. You'd have to measure changes over a longer time and possibly predict into the future. Maybe you could get away with detecting single frame brightness changes over a threshold and sort of smear the change over a period of time. Similar to that awful temporal shader that so many games use now.