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Been searching for a face tracking tutorial

 
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heynewt



Joined: 16 Apr 2009
Posts: 7
Location: L.A. Expat

PostPosted: Thu Apr 16, 2009 10:42 am    Post subject: Been searching for a face tracking tutorial Reply with quote

I've got a shot where I need to add a 3D proboscus (nose) to an actor which grows like Pinochio's nose grows.

I've done just about every tutorial for Syntheyes - there are lots - but I can't find one for facial tracking. It seems especially hard, because faces have parts that are constanly moving. Eyes blink, mouths smile, etc. I can't put tracking marks on the non-moving parts of the face, because, well... it's already been shot.

Anyone know of a good Syntheyes facial tracking tutorial?

Robert N.
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rtep



Joined: 12 Mar 2008
Posts: 142
Location: at the moment its Munich

PostPosted: Thu Apr 16, 2009 4:07 pm    Post subject: Reply with quote

there's no tutorial for this. you have to be bloody good matchmover to track non-rigid face without markers. good luck.
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heynewt



Joined: 16 Apr 2009
Posts: 7
Location: L.A. Expat

PostPosted: Thu Apr 16, 2009 7:05 pm    Post subject: Reply with quote

Well, ok then. I guess that's one way of looking at it. Anyone with a bit more optimistic reply?
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LFGabel



Joined: 16 Mar 2005
Posts: 298
Location: Vancouver Island, BC, Canada

PostPosted: Fri Apr 17, 2009 12:16 am    Post subject: Reply with quote

I've done this before, and there's lots of points you can track on the face, based on the quality of the source plates.

- Inner & outer corners of eyes
- Ridge of nose
- Tip of nose
- Nostrils
- Freckles
- Hair
- Ears
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vfxtodd



Joined: 16 Apr 2008
Posts: 8

PostPosted: Sun Apr 26, 2009 2:54 pm    Post subject: Reply with quote

heynewt,

Actually there is a tutorial that can get you 90% of the way there:

"Mesh Match Moving"
http://ssontech.com/content/boxmatch.htm

The tutorial shows you how to match move a box shape to "replace" the cargo part of a truck. The same techniques in the tutorial can easily be applied to a face model, etc.
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heynewt



Joined: 16 Apr 2009
Posts: 7
Location: L.A. Expat

PostPosted: Sun Apr 26, 2009 4:57 pm    Post subject: Reply with quote

Thanks, yes I did that tutorial. It was actually that tutorial that made me wonder about tracking a face. Good to know that's the starting point.

Robert


vfxtodd wrote:
heynewt,

Actually there is a tutorial that can get you 90% of the way there:

"Mesh Match Moving"
http://ssontech.com/content/boxmatch.htm

The tutorial shows you how to match move a box shape to "replace" the cargo part of a truck. The same techniques in the tutorial can easily be applied to a face model, etc.
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vfxtodd



Joined: 16 Apr 2008
Posts: 8

PostPosted: Sun Apr 26, 2009 6:12 pm    Post subject: Reply with quote

Yea, just make sure to use supervised trackers for parts of the face that you can assign to a vertex on the mesh. Like the corner of the eye, corner of the mouth, etc. And if you can put tracking markers on your subjects face, that might give you more to choose from as well.
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vfxworld



Joined: 24 Jun 2009
Posts: 8

PostPosted: Wed Sep 08, 2010 1:37 pm    Post subject: Reply with quote

Since your face is covered with skin, there'll be no chance to track this.
Only way would be manual keyframing.

Go ahead, tell your CG supvervisor he messed it up. No reason why you should spent hours of manual keyframing.
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gordonrobb



Joined: 17 Mar 2005
Posts: 285

PostPosted: Thu Sep 09, 2010 9:49 am    Post subject: Reply with quote

A view of the shot might help, even a lower res version. That way people could comment/help better. I have seen this done, just haven't done it myself.
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