Title: Classifying and resolving ambiguities in sketch-based interaction

Authors: Danilo Avola, Maria Chiara Caschera, Fernando Ferri, Patrizia Grifoni

Addresses: Department of Computer Science, University of Rome ''La Sapienza'', Via Salaria 113, 00189, Rome, Italy. ' Institute of Research on Population and Social Policies, National Research Council, Via Palestro 32, 00185, Rome, Italy. ' Institute of Research on Population and Social Policies, National Research Council, Via Palestro 32, 00185, Rome, Italy. ' Institute of Research on Population and Social Policies, National Research Council, Via Palestro 32, 00185, Rome, Italy

Abstract: Natural interaction approaches, such as the Sketch-based interaction, frequently imply ambiguities in the interpretation by the computer side. This paper focuses only on micro-level ambiguity analysing the interpretation of the abstract geometrical elements point, polyline and polygon. Considering a dynamic perspective, ambiguities can be caused by: inaccuracy in the user|s drawing, approximation of the represented reality and user|s deletion or retracing of fragments of the sketch. Moreover, this paper discusses methods to solve ambiguities taking into account the spatial and temporal information that characterise the user|s drawing, deleting and over-tracing process according to some experimental observations of users| behaviour.

Keywords: human–computer interaction; HIC; sketch-based interaction; ambiguity classification; ambiguity resolution; ambiguities; sketching.

DOI: 10.1504/IJVTM.2010.032056

International Journal of Virtual Technology and Multimedia, 2010 Vol.1 No.2, pp.104 - 139

Published online: 06 Mar 2010 *

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