3 ms·* affectiva (http://www.affectiva.com http://www.affectiva.com)by mr_O 11y ago* affectiva (http://www.affectiva.com http://www.affectiva.com)kgarten 11y agothey use a camera (so not really practical ;) )mr_O 11y agoyes I think your approach is the better technical solution.