[sldev] Anyone here with OpenCV experience?

[Jan Ciger]

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Hi Melinda,

Melinda Green wrote:
> I think some people are misunderstanding what is being asked for here. I
> could be wrong myself but my understanding is that Philip and Merov's
> intent is to simply translate user head movements into avatar gestures.
> Even something as simple as recognizing when the user appears to be
> nodding "yes" or shaking their head "no" and then triggering the
> appropriate gestures would be extremely cool and worth implementing. 

That is not what I have understood and the Logitech video was not
showing that neither. But you may be right - it would be good to get
things clarified from Lindens.

> I
> didn't interpret anything in what was asked to suggest controlling the
> camera, tracking gazes, or anything else. 

The camera control was in the original mail:

Philip:
> Is OpenCV the best package for extracting basic head 
> position/gesture information from a camera image stream?

And his second mail:
> This is what we want - simple head position and movement tracking from a camera.  

I agree with the gaze tracking and the rest - that is a different kettle
of fish that was asked about by other people.

> It certainly looks as if all
> sorts of interesting ideas are being generated and should definitely be
> captured. I certainly don't want to stop the brainstorming, but I think
> it would be helpful to first see how we could most easily trigger head
> gestures from video input before we attempt to design the best, most
> powerful API and implementations for full VR/MC support in SL.

I think that there is a confusion about the "gesture" term. Gestures can
mean SL gestures (essentially an animation + chat) and also movement
over time performed by human that needs to be captured and recognized -
an incredibly difficult job, much more difficult and complex than e.g.
tracking a position of the head.

Regards,

Jan

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