The Virtual Touch Screen is a simulation of a Touch Screen using a webcam, a mouse pointer simulation which is actually the user's finger or any other object used by the user as pointer. It is done by motion detection - subtraction of the images captured at time t and t+1. Because of the great complexity involved, it is extremely hard to detect the user's finger at any possible camera input.
Use an on-screen keyboard on touch screens with customizable interface.
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