HCI(Human Computer Interaction) Using Multi-Touch Tabletop Display

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In this paper, the authors describe the development of multi-touch tabletop display system and the classification of hand gesture commands for interacting with the system. And also, they analyze the suitability for interactive tabletop in light of the respective input and output degrees of freedom, as well as the precision and completeness provided by each. The system is based on FTIR (Frustrated Total Internal Reflection) principle and hand gestures for necessary instructions are predefined using position sensing and tracking of multi-touch points and the number of fingertips.