[sldev] Anyone here with OpenCV experience?

[Jan Ciger]

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Moriz Gupte wrote:
> This is funny. You dont seem enthusiastic about it.. yet the clip you
> posted makes me want to buy the TrackIR :)
> Getting motion scaling right is key... man I did not think this would
> work so well ...at least the demo in the second clip is awesome. Thanks
> for clips.
> 

We actually have several of the TrackIR devices in the lab. I think I
have tried probably all versions of it (we have some special
arrangements with Natural Point). In short - it works and it is quite
robust, but do not expect miracles from it. If you are willing to wear a
cap with a marker(s) or stick a reflective point to your forehead, it is
OK. It doesn't like direct sunlight and reflective surfaces (e.g.
glasses) which make false markers.

It works either as a mouse emulator (turning your head moves the mouse
cursor) - e.g. SL in mouselook could work with it without changes. Or
you can develop your own app using their SDKs. The whole device is
basically an USB infrared webcam + software, nothing else - essentially
what Philip was asking for.

There is a usability issue with it, though - if you turn your head to
the left, for example, the image on the screen moves accordingly -
however you probably do not see it any more because you are looking left
of the screen. In the best case you are squinting back at the screen
using your peripheral vision. These kind of devices work best if you
have at least 180 degrees  field of view covered (e.g. 3
screens/projectors in a U shape), a regular screen is not very natural
with it.

Regards,

Jan

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