Eulerian Video Magnification
Why Hacker News recommends it
Cited as the canonical demonstration of pulling out invisible signals like pulse from video, with commenters imagining other applications.
What it is
The video accompanying the SIGGRAPH 2012 paper on Eulerian Video Magnification. It amplifies subtle changes in ordinary video, such as skin color shifts from a heartbeat, to reveal pulse and tiny motions.
Recommended by 0 HN commenters across 0 different months, 2012 to 2018.
What Hacker News said
Cites pstuart · 2012-08 · on “Your Brain Can Be Hacked”
Between Paul Ekman's work in behavioral science and detecting a persons pulse rate from video ( [this video] ), it seems like one could have a pretty decent "lie detector" running on a smart phone.
Cites pgeorgi · 2013-05 · on “Xbox, A New Generation Revealed (livesteam)”
"read your heartrate" reminded me of [this video] (video to MIT paper submitted to SIGGRAPH about emphasizing video features, blood flow among them)
Cites raverbashing · 2015-06 · on “A New Algorithm Reveals the Hidden World of Imperceptible Motion”
I remember a similar technique (maybe it's from the same people) where they amplified color changes. So the tiny flushes caused by the heartbeat were clearly visible [this video] (from 1m30s)
Cites titojankowski · 2017-06 · on “No one gives a fuck about Climate Change”
Reminds me of those visualizations designed for magnifying tiny changes, Eulerian Video Magnification: [this video] Perhaps a potential application?
Cites lowdest · 2018-01 · on “User succumbs to a seizure in virtual reality while other players can only watch”
>What can we hack together that can be used to filter seizures? I think a video filter could do this. See this video on Eulerian Video Amplification from SIGGRAPH 2012: [this video] A similar technique to reduce the amplitude of strobing seems plausible.