PUBLIC MARKS from sbrothier with tag webcam

Analyze human emotions from facial expressions. More direct and automatic than by any other method. Free yourself from black boxes, electrodes, and wiring. Cost-effectively assess the emotional impact of service, product and brand messages on an unprecedented scale.

This is what I got when I combined webcam-based gesture recognition with Hakim El Hattab's reveal.js. It took me a while to write and fine tune the detection algorithms. Even then, the algorithms are only about 80% accurate. You get the gist of it though:  A flick of the hand in mid-air changes the slide. A two hand flick up or down activates the slide overview. Tips and troubleshooting in the slides below (you can still use the keyboard or reveal.js's built in controls)

My collection of webcam images has been put together over a period of 13 years. The archive contains more than 3 million images, downloads from all continents - the world wide web provides a lot. I photograph the world, using publicly accessible netcams, which give access to public and private space.