how to reduce flickering and jittering of small marker

Community support forum for users of the GPL-licensed osgART Standard Edition v1.0 and proprietary-licensed osgART Professional Edition v1.1
mistra
Posts: 2
Joined: Thu Mar 10, 2011 1:19 am

how to reduce flickering and jittering of small marker

Postby mistra » Sun Mar 13, 2011 5:49 am

HI,

I'm testing osgART and ARtoolkit application, and I realized that the result of osgART is more flickery and jitery than ARTookit samples.
I used osgART 2.0 version and the size of marker is 1.5cmX1.5cm. You can see the result.

jitter result.JPG
jitter result.JPG (33.08 KiB) Viewed 3667 times



Do you know any ideas to solve this problem?

retrakker
Posts: 125
Joined: Mon Dec 18, 2006 5:00 pm
Contact:

Re: how to reduce flickering and jittering of small marker

Postby retrakker » Tue Mar 15, 2011 5:38 am

Firstly, as you perceive osgART being more "flickery" is due to the fact osgART using the non-predictive path in ARToolKit for tracking. This introduces more jitter but it allows for more agile tracking. You can add pose filters in osgART.

However, on a general note, a tracking target of this physical size should be tracked using an very high-res image stream, at least 720p - otherwise it is pure luck that ARToolkit can actually distinguish or even find the pattern.


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