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http://dx.doi.org/10.9708/jksci.2013.18.11.069

Touch Recognition based on SIFT Algorithm  

Jung, Sung Hoon (Department of Information and Communications Engineering, Hansung University)
Publication Information
Journal of the Korea Society of Computer and Information / v.18, no.11, 2013 , pp. 69-75 More about this Journal
Abstract
This paper introduces a touch recognition method for touch screen systems based on the SIFT(Scale Invariant Feature Transform) algorithm for stable touch recognition under strong noises. This method provides strong robustness against the noises and makes it possible to effectively extract the various size of touches due to the SIFT algorithm. In order to verify our algorithm we simulate it on the Matlab with the channel data obtained from a real touch screen. It was found from the simulations that our method could stably recognize the touches without regard to the size and direction of the touches. But, our algorithm implemented on a real touch screen system does not support the realtime feature because the DoG(Difference of Gaussian) of the SIFT algorithm needs too many computations. We solved the problem using the DoM(Difference of Mean) which is a fast approximation method of DoG.
Keywords
Touch Screen; Capacitive Touch; Touch Recognition; SIFT Algorithm; DoM;
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