cv.jit.features2track question

Hmm, seems to be the problem with cv.jit.track, once something passes in front of your tracking point you are scuppered.

Sorry if you already know this, but eye tracking is normally done by shining IR light into the eye and then using an IR camera to see the reflection from the cornea/pupil. You can make your own IR camera and IR spotlight easy enough and I guess you could use something like blob tracking.

Not that I know of, maybe with some clever patching you could compare frames and get it to ignore the ones with too much difference ie blinking, but its not something I have tried or would know where to start with.

Regarding IR cameras, well you can use the security type cameras designed for night time use with a ring of IR led’s around them, and then just stick an IR filter over them to stop visible light, but you need some sort of hardware interface as they are normally BNC connection or maybe RCA. However a cheap option is to convert a normal webcam by taking out the IR blocking filter and putting an IR filter in to block visible light, this can be a proper filter or a piece of camera film or floppy disk, and I’m sure I’ve seen IR spotlight kits from Maplin. Here’s a good tutorial of how to adapt a PS3 eye camera:

http://createdigitalmotion.com/2009/08/trick-out-your-ps3-eye-webcam-best-cam-for-vision-augmented-reality/

Here’s some other helpful stuff:

http://cycling74.com/2009/10/26/making-connections-camera-data/

http://cycling74.com/forums/topic.php?id=25607