[Sunspark]

Interesting idea. I wonder if it would be better if the camera was from the side instead of the front (I know this isn't really doable for most). The thought process here is, should there be a calibration routine to compensate not just for the height of the monitor but also the position of the webcam? As I write this, I am using very bad posture--slouching back, head craned forward, etc, but my eyes would be in the "green" area on a 2D plane. Two lenses would help a bit with depth perception from the front.. so two webcams.. one from the monitor's bezel and one from the external webcam.

[killa_kyle]

Currently the extension relies on you to set the "good posture" baseline. You sit up to what you think is good posture, set the baseline, and then when you start slouching you'll move from the green to red.