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http://dx.doi.org/10.9717/kmms.2014.17.12.1430

Fingertip Touch Recognition using Shadow Information for General Wall Touch Screen  

Jeong, Hyun-Jeong (Division of Computer & Information, Dongseo Univ.)
Hwang, Tae-Ryang (Division of Computer & Information, Dongseo Univ.)
Choi, Yong-Gyun (Division of Computer & Information, Dongseo Univ.)
Lee, Suk-Ho (Division of Computer & Information, Dongseo Univ.)
Publication Information
Journal of Korea Multimedia Society / v.17, no.12, 2014 , pp. 1430-1436 More about this Journal
Abstract
We propose an algorithm which detects the touch of the fingertip on a general wall using the shadow information. Nowadays, there is a demand for presentation systems which can perceive the presenter's action so that the presenter can use natural movements without extra interface hardware. One of the most fundamental techniques in this area is the detection of the fingertip and the recognition of the touch of the fingertip on the screen. The proposed algorithm recognizes the touch of the fingertip without using the depth information, and therefore needs no depth or touch sensing devices. The proposed method computes the convex hull points of both the fingertip and the shadow of the fingertip, and then computes the distance between those points to decide whether a touch event has occured. Using the proposed method, it is possible to develop a new projector device which can perceive a fingertip touch on a general wall.
Keywords
Touch Screen; Convex Hull; Fingertip Touch; Projector;
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Times Cited By KSCI : 1  (Citation Analysis)
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