Publications

This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

Search for Publication


Year(s) from:  to 
Author:
Keywords (separated by spaces):

Assessing the Fidelity of the Haptically Rendered Deformable Objects

P. Leskovsky, M. Harders and G. Székely
14th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, IEEE Virtual Reality
Alexandria, Virginia, USA, March 2006

Abstract

A central element of surgical simulators is the generation of appropriate haptic feedback. Several factors influence this rendering process, which could potentially degrade the feedback quality. In this context, our current research aims at assessing, how well haptic sensations encountered during interaction with real objects, can actually be approximated in a virtual environment. Since finding appropriate soft tissue deformation models for real time interaction is a complex task in itself, we limited the investigations in this pilot study to simple linear-elastic silicone objects. A model of a virtual deformable object was adapted and parameters selected to approximate a real silicone sample within a specific hardware setup. A comparative study was performed, in which 13 subjects had to discriminate between the categories of real and virtual objects. We found that subjects could discern between the categories with a mean accuracy of 63% with no significant bias towards assuming the presence of either real or virtual objects. While being above chance level, the results indicate that we were able to approximate haptic feedback of a real object with high fidelity in our specific hardware setup.


Download in pdf format
@InProceedings{eth_biwi_00383,
  author = {P. Leskovsky and M. Harders and G. Székely},
  title = {Assessing the Fidelity of the Haptically Rendered Deformable Objects},
  booktitle = {14th Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, IEEE Virtual Reality},
  year = {2006},
  month = {March},
  pages = {19-25},
  series = {IEEE Virtual Reality},
  keywords = {haptic evaluation, haptic Turing test}
}