Recently in Multitouch Category

I'm back to work on the multitouch table project.

In my University, we are building a multitouch table. We decided to try something different from my last post: we want build a hybrid table, a table based on both the FTIR and the DI technique. We refer to the experiece of Johannes Luderschmidt.

First important element that I noticed is that Johannes uses a regular acrilic glass for the surface excluding the Plexiglas EndLighten. Probably the Plexiglas EndLighten could influence the performace because the plexiglass also redirects the IR towards the camera so it produce less contrast compared to normal DI setups.

We'd like to use a hi-res webcam as the Logitech Webcam Pro 9000. I called the Logitech Support Center and they assured me that it's possible to remove the IR filter.

About LEDs: we'd like to try to control LED in frequency (AC) to reduce heat. I'm goingo to investigate more the problem. Also I've apprecieted this link: Led wizard

PS. I put here a cople of links for my furure works: about LED choice and a fun newbie video

Well, my first post is about multitouch tables.
I'm going to make a Diffused Illumination based multitouch table for my laboratory.

Obviusly my first source is the Natural Interaction Group and their guide "Multi-Touch Technologies". I'm freely inspired to the EfeNDy's table.

Welll, my first step is defining the shopping list

• Box: I'm looking for a IKEA's product like this. I'd like to have a screen size about 80cmx60cm.
• Projector: Acer X1260P Eco (DLP) (there the projection calculator)
• IR: 5xEmitter
  
• Screen: I've already tested acrylic and white plastic table cloths as a diffuser and it works. I'd like to try a 4mm frosted glass, also.
• Mirror: a normal thin mirror
• Fans: 2x120mm standard
  
• Cameras: 2xPlayStation3 Eye.I'd like to test a multicamera configuration.
  
• Computer: My desktop computer (dual core2, 4gb ram bla bla bla). I'll test it also an my Mac Book Pro.