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
Longyu Zhang, Jamal Saboune, and Abdulmotaleb El Saddik, "Transforming a Regular Screen Into a Touch Screen Using a Single Webcam," J. Display Technol. 10, 647-659 (2014)