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FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Reflective Cap?

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scott	#1 02/04/2008 - 19h30 Top
Class : Apprenti Posts : 6 Registered on : 02/04/2008 Off line	Hi gang! Very new to this and just getting things setup. VERY COOL! Quick question: Would I be able to setup up a stationary LED array around the camera lens and use reflective stickers on the hat instead of the LEDs on the hat itself? I just figure that it would negate the need to attach a power supply to my cap. Thanks for your help. Scott I should also mention that I'm using wooden, reflective spheres .... not simply a flat piece of reflective tape. Edited by scott on 02/04/2008 at 19h40.
Deimos	#2 02/04/2008 - 19h59 Top
Class : Beta Tester Posts : 120 Registered on : 07/11/2007 Off line	Sure you can do that. I did it myself some time ago: http://forum.free-track.net/index.php?showtopic=466&message=3827 I used 3M diamond grade tape, something like this: I had some trouble with the clip shown on the picture, and i had to cut the tape pieces to round shape instead of rectangular and make them smaller. Also i heated up the retroflective tape with hot air (from SMD rework station) - i wanted to bend the tape pieces a bit to make them fit curves of the clip (that tape's really thick) , but instead i got a much better and unexpected effect: if you take a close look at the tape's surface, you'll notice a hexagonal plastic grid embedded in it. When i heated up the tape, the grid retained its shape, but the rest of the tape expanded, forming small domes over the tape's surface, making the reflections visible even better and from bigger angles. Before that accidental modification FT kept losing points, but now this setup works like a charm
didja	#3 02/04/2008 - 20h00 Top
Class : Webmaster (admin) Posts : 1043 Registered on : 09/07/2007 Off line Www	Hi and welcome abord ! It's going to be possible, but your light has to be really strong ! Rémy
scott	#4 02/04/2008 - 20h13 Top
Class : Apprenti Posts : 6 Registered on : 02/04/2008 Off line	Cool. Thanks for the help guys!
mse	#5 31/01/2009 - 16h55 Top
Class : Apprenti Posts : 1 Registered on : 31/01/2009 Off line	Is it possible reflective cap with Wiimote ? Edited by mse on 01/02/2009 at 01h02.
Kridian	#6 03/03/2009 - 18h10 Top
Class : Apprenti Posts : 3 Registered on : 02/03/2009 Off line	mse, the Wii remote only has an infared camera in it and no LED lights, so you would have make some sort of light scenario around that camera/remote. Yeah, I'd like that 100fps too!
knights	#7 04/03/2009 - 09h38 Top
Class : Apprenti Posts : 22 Registered on : 22/01/2009 Off line	didja @ 02/04/2008 - 19h00 a dit: Hi and welcome abord ! It's going to be possible, but your light has to be really strong ! Rémy Should a webcam with buildin IR-light work or reflect enough light?
cadcoke4	#8 06/03/2009 - 18h48 Top
Class : Apprenti Posts : 49 Registered on : 14/08/2008 Off line	Regarding reflective tape. I've done a bit of experimenting with various kinds for a different project. There does seem to be a lot of variation in how reflective various tapes are, and how large the "grain" is. By grain, I am referring to the size of each individual reflective element. It only matters if your grain is too small for the size of the targets you are cutting. As for sources, I've seen reflective tape or pieces at Walmart in the automotive department, and that was actually the best I came across in terms of brightness. But, I don't know if it actually matters for this project, since you are relatively close to your light source. Of course, any automotive parts store will have reflective tape, as will many hardware stores. Joe Dunfee
ndepal	#9 10/05/2009 - 21h43 Top
Class : Apprenti Posts : 3 Registered on : 10/05/2009 Off line	hey guys im new to all of this and im also planning on making a reflective model, as i prefer not having all those electronics on my head.... so what im planning on doing is having 6IR-LEDs on my computer screen to illuminate my reflectors. this is a number i just came up with myself with not much thought behind it. can you kind of estimate if that will work, or tell me a ballpark-figure of the mA i will need to have them take in order to get good results as for the camera, have a Microsoft Life Cam, which i dont thik will do. i am thinking about getting a ps3 eye as those get >100 FPS. (stop me if i shouldnt do that) thanks for your help [EDIT]: I just found a IR module on Conrad wich i think might do the trick for me. Heres the link to the Datasheet (english): http://www2.produktinfo.conrad.com/datenblaetter/150000-174999/150365-da-01-en-IR-Platine_f_150001_150014.pdf can you tell me if i can use this? it only costs 20CHF (~13€) and would be a lot easier than having to put it together myself. i would probably hook it up to a 9V Battery, so it would only be the lowest voltage necessary to run. please help me with this. thanks Edited by ndepal on 10/05/2009 at 21h54.

FreeTrack Forum > FreeTrack : English Forum > Support : Tracking System > Reflective Cap?

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