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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Jitter on LED edges

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Bucic	#1 03/01/2011 - 16h53 Top
Class : Apprenti Posts : 2 Registered on : 03/01/2011 Off line	Hi! I'm new to FreeTrack Yesterday I built my first 3-point model and finalized everything, as it seemed. But I have a problem with output jitter i.e. jittery camera movement when I don't look around. It seems that it all comes from the pixel jitter on the edges of each LED point as received by FreeTrack. Is there a way to get smooth edges on these points? Here's how it looks in FT: http://www.youtube.com/watch?v=2RCm_OJdy24 EDIT: BTW, when I try to make the points smaller by using threshold, gamma and exposure I get very pixelated points that barely resemble circles/dots. Edited by Bucic on 03/01/2011 at 18h10.
Volans	#2 04/01/2011 - 16h18 Top
Class : Apprenti Posts : 39 Registered on : 14/11/2007 Off line	At first look it seems camera out of focus. Try to adjust focus by rotating tehe lens ring , trying to obtain the smallest dots. cheers.
Volans	#3 05/01/2011 - 07h57 Top
Class : Apprenti Posts : 39 Registered on : 14/11/2007 Off line	Or maybe ir led's "light" is too bright because: - ir filter of camera is too weak, try to use a piece of floppy disk -ir led too powerfull, either by default or they are overpowered, you might reduce voltage to make them fainter. As far as I can see from your movie, your led appear to be enough "wide", camera can see them at any angle....
Bucic	#4 05/01/2011 - 19h54 Top
Class : Apprenti Posts : 2 Registered on : 03/01/2011 Off line	Volans @ 04/01/2011 - 16h18 a dit: At first look it seems camera out of focus. Try to adjust focus by rotating tehe lens ring , trying to obtain the smallest dots. cheers. Already tried. Volans @ 05/01/2011 - 07h57 a dit: Or maybe ir led's "light" is too bright because: - ir filter of camera is too weak, try to use a piece of floppy disk -ir led too powerfull, either by default or they are overpowered, you might reduce voltage to make them fainter. As far as I can see from your movie, your led appear to be enough "wide", camera can see them at any angle.... Thanks for your response but I already use a floppy disk, IR leds are weak (I have tune the camera settings to make them visible and to even more extent to make them visible at higher angles), my LEDs are 5 mm.

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Jitter on LED edges

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