Comprehensive workspace calibration for visuo-haptic augmented reality

Ulrich Eck, Frieder Pankratz, Christian Sandor, Gudrun Klinker, Hamid Laga

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

4 Scopus citations

Abstract

Visuo-haptic augmented reality systems enable users to see and touch digital information that is embedded in the real world. Precise colocation of computer graphics and the haptic stylus is necessary to provide a realistic user experience. PHANToM haptic devices are often used in such systems to provide haptic feedback. They consist of two interlinked joints, whose angles define the position of the haptic stylus and three sensors at the gimbal to sense its orientation. Previous work has focused on a calibration procedures that align the haptic workspace within a global reference coordinate system and an algorithms that compensate the non-linear position error, which is caused by inaccuracies in the joint angle sensors. In our science and technology paper 'Comprehensive Workspace Calibration for Visuo-Haptic Augmented Reality' [1], we present an improved workspace calibration that additionally compensates for errors in the gimbal sensors. This enables us to also align the orientation of the haptic stylus with high precision. To reduce the required time for calibration and to increase the sampling coverage, we utilize time-delay estimation to temporally align external sensor readings. This enables users to continuously move the haptic stylus during the calibration process, as opposed to commonly used point and hold processes. This demonstration showcases the complete workspace calibration procedure as described in our paper including a mixed reality demo scenario, that allows users to experience the calibrated workspace. Additionally, we demonstrate an early stage of our proposed future work in improved user guidance during the calibration procedure using visual guides.

Original languageEnglish
Title of host publicationISMAR 2014 - IEEE International Symposium on Mixed and Augmented Reality - Science and Technology 2014, Proceedings
EditorsRobert W. Lindeman, Christian Sandor, Simon Julier
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages333-334
Number of pages2
ISBN (Electronic)9781479961849
DOIs
StatePublished - 5 Nov 2014
Event13th IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2014 - Munich, Germany
Duration: 10 Sep 201412 Sep 2014

Publication series

NameISMAR 2014 - IEEE International Symposium on Mixed and Augmented Reality - Science and Technology 2014, Proceedings

Conference

Conference13th IEEE International Symposium on Mixed and Augmented Reality, ISMAR 2014
Country/TerritoryGermany
CityMunich
Period10/09/1412/09/14

Keywords

  • H.5.1. [Information Interfaces and Presentation]: Multimedia Information Systems - [Artificial, augmented and virtual realities]
  • H.5.2. [Information Interfaces and Presentation]
  • User Interfaces - [Haptic I/O]

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