Localization of taps on solid surfaces for human-computer touch interfaces
Reju, Vaninirappuputhenpurayil Gopalan
Khong, Andy Wai Hoong
Date of Issue2012
School of Electrical and Electronic Engineering
Localization of impacts on solid surfaces is a challenging task due to dispersion where the velocity of wave propagation is frequency dependent. In this work, we develop a source localization algorithm on solids with applications to human-computer interface. We employ surface-mounted piezoelectric shock sensors that, in turn, allow us to convert existing flat surfaces to a low-cost touch interface. The algorithm estimates the time-differences-of-arrival between the signals via onset detection in the time-frequency domain. The proposed algorithm is suitable for vibration signals generated by a metal stylus and a finger. The validity of the algorithm is then verified on an aluminium and a glass plate surface.
DRNTU::Engineering::Electrical and electronic engineering
IEEE transactions on multimedia
© 2012 IEEE. This is the author created version of a work that has been peer reviewed and accepted for publication by IEEE Transactions on Multimedia, IEEE. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at DOI: [http://dx.doi.org/10.1109/TMM.2013.2264656 ].