After the microsoft release of the “Surface”, multi touch technology is getting a lot of attention. Many of the hardware vendors are getting multi touch devices. The latest Apple Pro has a multi touch sensor. The open source guys also have entered into multi touch technology.

TouchLib is a open source library for using your web cam as a sensor for a multi touch device. All you have got to do is to house a webcam inside a card board box so that it faces one of its openings. Then cover the opening with a semi transparent screen. You make a semi transparent screen by using a glass sheet and draft paper. Connect the web cam to your PC and install the TouchLib and associated softwares. Its to to have some fun with Multi touch.