So, as a quick demo to see whether my set-up is suitable for ‘blob tracking’ I downloaded the open source Reactivision software from the people who make Reactables and apart from a huge white spot in the middle of the screen the system appears to work!! Fingers placed on screen seem to cause bounding rectangles to appear which is a good sign.  The next step is either to rebuild the software for my own sinister purposes…or to just use OSC to get the data into Processing.

It may be a little hard to understand what’s going on here.  The white spot in the middle is probably because my light isn’t diffused properly.  my fingertips are the four small blobs in the bottom left hand corner.