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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Side-facing camera setup?

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Hamish	#1 09/05/2013 - 20h35 Top
Class : Apprenti Posts : 5 Registered on : 09/05/2013 Off line	Hi all. I've been thinking about making myself a FreeTrack system for a while and finally got around to it. My computer is situated in the corner of a room such that there is a wall about 20 inches to my right. I mounted my camera on the wall facing the side of my head and assembled a 3 point clip model oriented on my head in the traditional way, (the plane of the LEDs is parallel to the direction I am facing.) This confuses FreeTrack because instead of seeing three points in a vertical line, it sees the side on view. (When I'm looking straight towards the monitor) I have got Pitch and Yaw working (but not well enough to play with), by mapping Roll to Yaw and X to Pitch. I imagine if I had the model facing the camera so that it saw the LEDs in a vertical line (as it expects), then it would work better. I'll try this now. In the mean time I thought I'd come on here and ask the community if anyone has tried a side-facing camera setup before?
Stormrider	#2 09/05/2013 - 22h10 Top
Class : Légende du Forum Posts : 466 Registered on : 02/01/2013 Off line	Hi, Iam not sure, but you can choose side instead of front.Take a look at the Cam-tab maybe that is what you need. Greetz Stormrider
Hamish	#3 09/05/2013 - 23h57 Top
Class : Apprenti Posts : 5 Registered on : 09/05/2013 Off line	That box where you can choose Front, Side, Top, First Person? That's just for setting the view of the virtual skull. I'm pretty sure it has no effect on anything else.
Steph	#4 10/05/2013 - 08h54 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	Hi Hamish, As far as I know, this angle of tracking isn't possible. You can adjust the Cam position in the Cam-->Orientation table: ...but as you can see, max. value is 60° for yaw and pitch. I do not see, why you want to fix your cam this way. Isn't there enough place around your monitor?
Hamish	#5 10/05/2013 - 12h29 Top
Class : Apprenti Posts : 5 Registered on : 09/05/2013 Off line	Two reasons: 1. The camera would be closer to the points and therefore probably get a clearer image. 2. The point model could be on the side of my head and completely out of my peripheral vision.
Steph	#6 10/05/2013 - 13h21 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	Hi, You don't need a "clear" image. Freetrack only track dots to calculate geometric positions. Therefore resolution, focus and size of this dots are secondary. Try to map your head-movements to other axis: ...but in my eyes your about to complicate your life.
Hamish	#7 10/05/2013 - 14h56 Top
Class : Apprenti Posts : 5 Registered on : 09/05/2013 Off line	Steph @ 10/05/2013 - 13h21 a dit: You don't need a "clear" image. Freetrack only track dots to calculate geometric positions. Therefore resolution, focus and size of this dots are secondary. I'm using visible light LEDs so to stop them casting unwanted light I've covered them with film. This makes them dimmer so putting the camera closer helps the camera actually see them. Steph @ 10/05/2013 - 13h21 a dit: Try to map your head-movements to other axis: Hamish @ 09/05/2013 - 20h35 a dit: I have got Pitch and Yaw working (but not well enough to play with), by mapping Roll to Yaw and X to Pitch. Edited by Hamish on 10/05/2013 at 14h57.
Steph	#8 10/05/2013 - 18h35 Top
Class : Moderator Posts : 656 Registered on : 16/11/2007 Off line	I have got Pitch and Yaw working (but not well enough to play with), by mapping Roll to Yaw and X to Pitch. You have to map Yaw on Yaw, Pitch to Roll, Roll to Pitch, X to Z, Y to Y and Z to X. And the track-clip must be oriented to the cam, otherwise it won't works.
Hamish	#9 11/05/2013 - 15h47 Top
Class : Apprenti Posts : 5 Registered on : 09/05/2013 Off line	Yes that is what I have been using with the clip on the back of my head. All working fine. Roll to Yaw and X to Pitch was when I had the clip on the side facing perpendicular to the camera.

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Side-facing camera setup?

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