This is it!! I've built my own eye tracker and I think I can be satisfied with the first try. I was able to remove the IR filter from to PS Eye and add an IR bandpass. I was also able to install the two IR LEDs and power them with two 1,5V batteries. With a twisted aluminum wire, I could mount the tracker to a pair of 1€ sunglasses.
I did testruns with this construction with ITU GazeTracker and the EyeWriter tracking software.
Both showed favourable results.
I could already use my eyes controlling a pointer in both softwares. However it was not that accurate, perhaps caused by my "temporal" eye tracker constuction.
Accuracy was better with ITU tracker, in my opinion.
TODO: Improve accuracy, either with better eye tracker or optimizing the software.
I found out that the EyeWriter software does not do any glint tracking, but only pupil tracking.
The glint tracking on the ITU software seems to require for brighter IR LEDs as sometimes, the tracking was poor.
Another problem, I encountered is that the glasses are black, which may sometimes disturb the tracker from my pupils.
TODO: Use differently colored glasses or use a colored tape on my current ones
One problem occured because of the human anatomy: there is a huge vein running next to my eyes. Wearing the sunglasses tightly on my skin causes them to bounce, beacuse the vein gives an impulse everytime my heart beats.
TODO: Find sth. I can use for cushoning
All in all, I think these are good results for a first try.
Looking forward wrking on this interesting topic on Tuesday!
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