MicroRolls: expanding touch-screen input vocabulary by distinguishing rolls vs. slides of the thumb

  • Authors:
  • Anne Roudaut;Eric Lecolinet;Yves Guiard

  • Affiliations:
  • TELECOM ParisTech - CNRS LTCI, Alcatel-Lucent Bell Labs France, Paris, France;TELECOM ParisTech - CNRS LTCI, Paris, France;TELECOM ParisTech - CNRS LTCI, Paris, France

  • Venue:
  • Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
  • Year:
  • 2009

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Abstract

The input vocabulary for touch-screen interaction on handhelds is dramatically limited, especially when the thumb must be used. To enrich that vocabulary we propose to discriminate, among thumb gestures, those we call MicroRolls, characterized by zero tangential velocity of the skin relative to the screen surface. Combining four categories of thumb gestures, Drags, Swipes, Rubbings and MicroRolls, with other classification dimensions, we show that at least 16 elemental gestures can be automatically recognized. We also report the results of two experiments showing that the roll vs. slide distinction facilitates thumb input in a realistic copy and paste task, relative to existing interaction techniques.