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Show HN: See what makes presidential candidates' hearts beat faster (Live)
- fizzbatter 10y agoThis is awesome. I fear how accurate it might be, though. Even if the technology is accurate (i believe it is), this, like most things with this presidential campaign, seems prone to fudging.
- xchip 10y agohow do we know whether this is true or not?
- ororm 10y agoYou can try the algorithm yourself if you scroll down, then double check with your webcam and your own pulse ;-). Note that motion compensation is disabled for this demo, so it only works well if you do not move for a few seconds (the reason being that the pixel-accurate facial feature and skin detection algorithms would kill the server if 2-3 people try at the same time).
- tchadwick 10y agoI assume they are using the theory/algorithm from the MIT video magnification work: http://people.csail.mit.edu/mrub/vidmag/ http://people.csail.mit.edu/mrub/vidmag/
- ororm 10y agoFor this purpose, MIT's Eulerian Video Magnification is next to impossible when you have both color changes and large motions (it is better suited to magnifying small motions, or subtle color changes in unmoving patches). NASA Glenn's thearn has developed another approach which has the same problems (https://github.com/thearn/webcam-pulse-detector https://github.com/thearn/webcam-pulse-detector). We developed our own solution, involving (among other things) pixel-accurate facial feature detection and filtering methods not subject to FFT's regularity assumption
- ts314 10y agoThere's now a blog post with some analysis on this: https://hearty785.wordpress.com/ https://hearty785.wordpress.com/