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Old 11-06-2013, 10:17 AM   #1
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Charles Wren
Leicestershire, United Kingdom
Join Date: Dec 2010
Posts: 12
Question Geometry Tracking vs Object Tracking (PFTrack)

Hi guys and gals,
I come in search for help

I've got a shot that I'm trying to track, it's a test plate for an upcoming shoot.
It's quick and dirty, but gives me the chance to try out the techniques that I'll need to use on the actual shoot.

My question is - Should I be using Geometry Tracking or Object Tracking?
Currently, I'm trying to Object Track the shoot, with strange results. I've attached a couple of screen shots to illustrate this. The end result is a wonky bounding box. However, the bounding box does stick really tightly to the subject.
So I export the scene to Nuke, and when I bring it in, all I get is a single node containing the tracking marker nulls. Which would be fine, but they have no animation properties. So i can't use this for anything.
I was expecting something similar to when I bring a camera into Nuke from PFTrack - the camera comes in, complete with animation properties for translate, rotate, focal length etc.

Can anybody advise? Perhaps I've missed a step in PFtrack? Or maybe I'm going about this in the wrong way. The subjects back is, after all, never going to be completely still. So maybe I need to look at geometry tracking? I'm just struggling here, I've got nowhere fast when trying to geometry track the stock 'grid' to the subjects back.

Any help/advice/tips would be hugely appreciated

Huge thanks in advance,
Old 11-09-2013, 04:12 PM   #2
kyriakos Rissakis
Athens, Greece
Join Date: Apr 2011
Posts: 143
I do not know what object tracking is but for Geometry track
Nuke Python script export produces a .py an .obj and an .mtl.
When i import script (from PFtrack 2012) to Nuke 7 i get
camera and object separate animation- everything seems to be fine.
Old 11-09-2013, 04:12 PM   #3
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