Abstract
Nowadays, touch screens are widely used in many commercial devices.
In this paper, we present an inexpensive webcam-based touch screen system
based on a simple and generic finger detection technique. Only a single webcam
and a regular screen are used to achieve this goal. By using the scene geometry
and the camera model, we can determine the position of the finger on the screen.
The technique we propose is simple and works well under various surrounding
environments while the detecting method suits many finger colors and shapes.
Our approach can also be used for realtime applications. Experimental results
and practical applications are provided to ascertain the proposed method.
© 2014 IEEE
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