Building a system working with BlobDetection and Pepper’s Ghost illusion is quite simply.
You need a laptop able to running with Processing: in this case I used a PowerBook G5 and this last is much more better then one G4!
The laptop needs to be connected, by a VGA cable, to the screen inside the black box.
In order to have a good frame of the viewier, it is better if you try to fix the web cam (the third useful object) in different ways, when you take a decision you have to find a good solution to put it on the box (I asked Filippo Mastinu to do it…he was a good blacksmith!)
Abow the diagram of the all components.
Consedering a real installation, it might be better to have a back projection than an image from one little screen.