Author Topic: Isn't it better to use the reflectors method?  (Read 14405 times)

Offline eyals

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on: January 10, 2008, 01:56:06 AM
Instead of attaching leds to your eyeglasses, wouldn't it be better to use an IR projector and stick 2 tiny reflectors above your eyes? (like in the finger tracking application)



Offline duality72

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Reply #1 on: January 10, 2008, 10:27:50 AM
Can you expand on why that would be better?



Offline gabort

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Reply #2 on: January 12, 2008, 06:27:56 PM
Ehm... it could warm your head? :)



Offline Nphyx

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Reply #3 on: January 13, 2008, 12:52:45 AM
I already posted this on the project blog before I found this site, but the benefit to using reflectors for head tracking, as I imagine the OP envisioned, is the fact that reflectors don't require a power source.  Taking it a step farther, one could simply coat each lens on a pair of glasses (better yet, stereoscopic glasses) with a substance which is transparent in the visible spectrum and reflective in the IR spectrum.



Offline troy59

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Reply #4 on: January 14, 2008, 12:07:30 PM
yes, so there would be no batteries, and know things sticking out the side of your head, you could even find a stylish pair of sunglasses to coat on the reflective liquid, that way, you just walk up to the screen, pop on your glasses, and your ready to go.



Offline bryanarby

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Reply #5 on: January 14, 2008, 12:56:49 PM
???reflective mirror in tape form???

wiipen
point ATM: building V2
V1: 1 LED on 1 AAA battery feed
V2: 1 LED on USB feed
V2 will be remodded too V3
V3: 1 LED on USB feed /w LMB and RMB
V4: 1 LED WIRELESS /w LMB and RMB
V5: we'll see :3
Vmany: Bluetooth IR pen with mouse functions.


Offline atomriot

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Reply #6 on: January 14, 2008, 01:49:13 PM
it would not only have to reflect the light, but reflect it no matter what orientation you have it.

if it is a very clear mirror tape and it was flat then you are more likely to reflect the led light to a specific point rather than just back in that general area.

think of it like a window with a flashlight on the other side, sure the clear light goes through, but if it was glossed over, the light would be dispersed more evenly around so that it lights up more, just not as much.

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline bryanarby

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Reply #7 on: January 14, 2008, 02:02:22 PM
good point, but glasses are rounded arent they, so aplying it on glasses has the right effect I guess :).

wiipen
point ATM: building V2
V1: 1 LED on 1 AAA battery feed
V2: 1 LED on USB feed
V2 will be remodded too V3
V3: 1 LED on USB feed /w LMB and RMB
V4: 1 LED WIRELESS /w LMB and RMB
V5: we'll see :3
Vmany: Bluetooth IR pen with mouse functions.


Offline troy59

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Reply #8 on: January 18, 2008, 02:42:57 PM
yes, that is correct, althought they do have square glasses. also, another thing you might be able to try, would be two way mirror glases. you can see through them, but its a mirror on the outside. don't know if the reflected light form a lamp or ceiling light would effect it thouogh?



Offline EuroMateo

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Reply #9 on: January 21, 2008, 03:51:33 PM
wow. You guys are thinking too much.

Eyeballs. They reflect light. Especially the IR LED light if the sensitivity is increased.

Catch: Only create a football shape recognition program.

See http://www.wiimoteproject.com/project-ideas/completely-human-computer-interactive-media-center-t226.0.html

and http://www.wiimoteproject.com/project-ideas/wiitrack-wiimote-headtracking-desktop-environment-t139.0.html


Offline atomriot

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Reply #10 on: January 21, 2008, 05:09:37 PM
yes but eyeballs are exactly that, balls

they will not reflect enough light directly back at the sensor.

you will get more bounceback from your face or anything else mildly reflective that it can see.

eye tracking in that sence would have to be done with a specifically aimed camera, not randomly flying IR

Details, details. Things to do. Things to get done. Don't bother me with details, just tell me when they're done.
--
James Lionel Price



Offline EuroMateo

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Reply #11 on: January 21, 2008, 05:24:44 PM
"yes but eyeballs are exactly that, balls"
- which will make it very universal for a program to recognize.

http://images.jupiterimages.com/common/detail/47/59/22425947.jpg

"they will not reflect enough light directly back at the sensor."
- if you add more IR LED or increase the sensitivity they most deffinetly will (but we dont want to much because there should be a distance at where the recognition stops working if you choose not to operate the computer/media center. (also for keyboard)

"you will get more bounceback from your face or anything else mildly reflective that it can see."
.. lol Yes I know that. That is why i keep saying i need programing help to make a "RECOGNITION program" where it would differenciate the clear shape of eyeballs and the distance between them as opposed to the significant difference between a face, nose, palms, etc.

"eye tracking in that sence would have to be done with a specifically aimed camera, not randomly flying IR"
no.. it would not. It would use the same exact concept as Johnny showd us with VR Desktop video.


Offline Hillfire

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Reply #12 on: January 25, 2008, 09:43:35 PM
...thanks for not linking to a shot from the Paris Hilton tape.

Anyway, the problem with a recognition/filter program is that the wiimote can only return 4 points that were detected and the approximate radius of those points. It does all the image analysis internally, through an unknown algorithm. That is not nearly enough data to determine what is being observed when there are possibly hundreds of points of reflection.

  - Ken



Offline mknewman

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Reply #13 on: January 31, 2008, 09:29:29 AM
What about tiny corner reflectors?



Offline troy59

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Reply #14 on: January 31, 2008, 09:50:14 AM
Why not just the whole glasses reflecting, they don't have to be circular, they can be square