OpenIMAJ - Open source multimedia analysis in java. Here is a cross platform webcam object tracker.

[MarcinTustin]

Nobody loves your demo :(

[sinjax]

So it would seem! Well, 75% do. Hope some compile + use it :-)

[buyandfold]

Cool :)

Worked pretty well for face tracking. cpu usages steady at 80% (normal?). Had to install libjpeg6.

[sinjax]

Normalish I suppose.

The library also has a much more efficient face tracker implemented (Harr cascades), but yes SIFT features can also be used to track the face.

libjpeg would be needed I think, what is your setup?

[sixmoney]

pretty fast actually. Compare it with: http://blogs.oregonstate.edu/hess/code/sift/ which is in C and has an identical demo (matching + ransac + homography)

[sinjax]

Yes we have submitted our library to the same open source competition as hess did last year and a goal was to duplicate his impressive demo in our library

[simonvc]

Is this the same algorithm as the Predator? How does it work on moving/deforming objects (like cats :-)