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Messages - Seán McT

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General Hardware Talk / Re: Resolve Under Sampling
« on: February 07, 2010, 06:40:27 PM »
Sorry Just saw the link you attached thanks a lot man, thats a huge help!

General Hardware Talk / Re: Resolve Under Sampling
« on: February 07, 2010, 06:37:25 PM »
Wow thanks man, thats a great help sorry I have been working on this project alone and made up some of the technical terms myself so all of what you assumed I was trying to say was correct. I have been using the phone camera to see the source of the LED's ive been using. See the photo attached for the circuit I have been using. I am sending the data to my system via a program called OSCulator, this reads all of the data sent via the wiimote.

What you mentioned about triangulation, Is there a set distance that is required in order to get an accurate reading of how far a user is distance-wise from the screen (this is what I was referring to by the z - axis sorry!).
The OSCuator program is reading the infrared that isn't a problem as I can see this on the X and Y axis, What you referred to as triangulation may be the answer, any Ideas on how the reading could be more accurate? The image attached has the LED's about 7 cm apart this is just a prototype circuit but it is what I have been using.

General Hardware Talk / Resolve Under Sampling
« on: February 07, 2010, 10:33:13 AM »
Hi when building a source of infrared what voltage is needed in order to produce a smooth stream on the Z axis? Currently I have two Infrared bulbs hooked up to two AA batteries, but the Z axis samples are jumping from high two low without a stream of data in between, Does anybody have any ideas that would help me? Would save me a lot of trial and error research. Thanks


General Discussion / Re: Equations?
« on: December 27, 2009, 06:04:08 AM »

This equation for the Euclidean distance metric

For X and Y, say the system had two objects on screen (A+B), If A was closest to the screen and B was further, then relative to the users position from the screen the speed of move moment of the objects would the would be inversely proportional from the distance to the user. Of B was twice as far as A it would move at half the speed. This is the formula for motion parallax.

I plan to input the values using OSCulator, sending the data stream through port 9999 and into and open source software called PD extended. IN this software there is a section called GEM, In gem I will simply put the data stream through the equations above and feed these new values into a rotate camera object that comes with the software. However I am unsure if the equations work or are necessary!

General Discussion / Equations?
« on: December 18, 2009, 08:54:41 AM »
Not too sure if this is the right part of the board to post this but, Does anybody know what the Equations are that are added to the targets in the head-tracking program? I am building system at the moment and am thinking of using the Euclidean Distance Metric on the Z axis along with Motion Parallax on the X and Y, Is this a correct approach? Thanks in advance,

General Discussion / General Help
« on: September 22, 2009, 12:30:06 PM »
Hi, Ive recently started working on a head tracking project and was wondering if anybody had any pointers for starting out? What to watch out for where to even start would be a big help to be honest. I'm a but in the deep end!

Quite a mouthful I know but thats the name of the project I'm working on for my undergraduate Final year project. I'm Studying Music Media and Performance Technology in the University Of Limerick (Ireland). My course hasn't dealt with much coding so this is a new area for me. The idea would be to produce visuals similar to those on the windows media player and display them on a LED screen where the user can immerse themselves using head tracking.

The only experience I have with coding is a very basic a java module we did in my first year. So the question i'm asking where do I start? Is C# necessary? or is it possible to produce this on another program using the same live inputs? EG PD or Flash?

Basically i'm in the deep end here and would love any pointers!! Thanks in advance for the replies!

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