jittering the image when projected onto the marker


I've opened a discussion over the jittering of the image (http://slartoolkit.codeplex.com/Thread/View.aspx?ThreadId=217564)
saying that there seems to be a jittering on the projected image on a marker (that's possible to see in the video in here http://vimeo.com/9713000 if anyone is interested)
teichgraf has answered that the solutions has to be fast.
I suggest the usage of the Kalman Filter (http://en.wikipedia.org/wiki/Kalman_filter) since it is contained on the original ARToolkit and it has not been implemented on the jARToolkit (java one, that has the same problem as seen in this SLARToolkit)
I Think this links can help you understand the filter: (It's a bit complex from what I heard, however the complexity lies in understanding the algorithim not on running it):
Hope it helps


teichgraf wrote Apr 13, 2011 at 7:36 PM

I implemented a simple anti-jittering functionality to the MarkerDetetor API. Just set the JitteringThreshold to 1 or more to get an anti-jittering effect.

wrote Apr 13, 2011 at 7:39 PM

gleeforce wrote Jul 23, 2011 at 8:18 AM

I agree that there's jittering. It's rather disturbing when it happens. I tried it for the 3D example and the object is shaking. Whether using Kalman filter or not, there should be some form of even a simple filter to smoothen the hard changes to the position of the detected marker. Hope this can be seen in the next code iteration.

teichgraf wrote Jul 23, 2011 at 10:42 AM

Hey gleeforce,
Please read my earlier comment. I implemented a simple anti-jittering functionally. It's used in the new SL5 sample.

wrote Feb 21, 2013 at 11:07 PM

wrote May 16, 2013 at 10:39 AM

wrote May 16, 2013 at 10:39 AM

wrote Jun 14, 2013 at 7:24 AM