An approach for designing and evaluating a plug-in vision-based tabletop touch identification system

Andrew Clayphan, Roberto Martinez-Maldonado, Christopher Ackad, Judy Kay

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

11 Citations (Scopus)


Key functionality for interactive tabletops to provide effective collaboration affordances requires touch identification, where each touch is matched to the right user. This can be valuable to provide adaptive functions, personalisation of content, collaborative gestures and capture of differentiated interaction for real-time or further analysis. While there is increased attention on touch-identification mechanisms, currently there is no developed solution to readily enhance available tabletop hardware to include such functionality. This paper proposes a plug-in system that adds touch identification to a conventional tabletop. It also presents an analysis tool and the design of an evaluation suite to inform application designers of the effectiveness of the system to differentiate users. We illustrate its use by evaluating the solution under a number of conditions of: scalability (number of users); activity density; and multi-touch gestures. Our contributions are: (1) an offthe- shelf system to add user differentiation and tracking to currently available interactive tabletop hardware; and (2) the foundations for systematic assessment of touch identification accuracy for vision-based systems.

Original languageEnglish
Title of host publicationProceedings of the 25th Australian Computer-Human Interaction Conference
Subtitle of host publicationAugmentation, Application, Innovation, Collaboration, OzCHI 2013
PublisherAssociation for Computing Machinery (ACM)
Number of pages10
ISBN (Print)9781450325257
Publication statusPublished - 2013
Externally publishedYes
EventAustralian Computer Human Interaction Conference 2013 - Adelaide, Australia
Duration: 25 Nov 201329 Nov 2013
Conference number: 25th (Conference Proceedings)


ConferenceAustralian Computer Human Interaction Conference 2013
Abbreviated titleOZCHI 2013
Internet address


  • Design
  • Evaluation
  • Interactive tabletops
  • User differentiation

Cite this