Those one frame flashes are easy to see though (which makes me wonder where the previous result of 100ms treshold for image recognition came from). Probably coi

Those one frame flashes are easy to see though (which makes me wonder where the previous result of 100ms treshold for image recognition came from). Probably coincidence resulting from similar frame rates, but I think movie projectors were running 72 hz shutter showing each frame 3 times to provide low flicker image. That amounts to 14~ ms per showing which is close to what they tested here. Of course part of the time the shutter is blocking (50%?) so the actual image might be projected only half of the time.