TouchLight: an imaging touch screen and display for gesture-based interaction

A novel touch screen technology is presented. TouchLight uses simple image processing techniques to combine the output of two video cameras placed behind a semi-transparent plane in front of the user. The resulting image shows objects that are on the plane. This technique is well suited for application with a commercially available projection screen material (DNP HoloScreen) which permits projection onto a transparent sheet of acrylic plastic in normal indoor lighting conditions. The resulting touch screen display system transforms an otherwise normal sheet of acrylic plastic into a high bandwidth input/output surface suitable for gesture-based interaction. Image processing techniques are detailed, and several novel capabilities of the system are outlined. Categories and Subject Descriptors H.5.2 [Information Interfaces and Presentation]: User Interfaces—Input devices and strategies; I.4.9 [Image Processing and Computer Vision]: Applications General Terms Algorithms, Design, Human F...

• Type: Conference
• Year: 2004
• Where: ICMI
• Authors: Andrew D. Wilson
• Keywords: Acrylic Plastic, ICMI 2004, Image Processing Techniques, Touch Screen