1 post tagged “development”

 

So I have decided to finally blog about my multi-touch development.  I started with a 3' x 2' arcylic (which is still wrapped in the bedroom closet) but decided to start with something much more portable. 

Yes, that is an old school 9V battery hook-up.  I originally created a 12 LED strip for the 10" side but that was way too bright.  I settled on the 6 LED strip because it seems bright enough for my software development plans and since I only have 1 ohm resistors, I really can't go lower than 6 LEDs in series.

The main reason for going so small was to have something next to me while I was coding for quick feedback during development.The Phillips webcam is pretty good in low light and the IR filter was easy to install. 

My grandiose plan is to eventually use a matrix of LCD panels instead of a projector for display.  I *think*  webcams behind the LCDs will work for capturing blobs. 

For now though, I'm in the API phase so I'm focusing just on getting blob detection working.  These acrylic frame holders allow for easy portability.

So with that, this is what the development setup looks like with my hand used for perspective.  It is very easy to move but still a bit fragile.  I'm not worried about a compliant surface yet; however, I hear that 0.5mm silicone rubber is the way to go.  Once the Blob API is further along, I'll have to deal with blob sensitivity and other issues that a compliant surface may effect.  Along those lines, since each slate will have different sensitivity issues, I may need a "set-up" phase in the software to allow for calibration.  Anyway, there you go.  It's too bright right now to take pictures of the slate in action under infrared.  I'll save that for another post.