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Issue No.04 - April (2013 vol.19)
pp: 626-633
Jonas Spillmann , Comput. Vision Lab., ETH Zurich, Zurich, Switzerland
M. Harders , Comput. Vision Lab., ETH Zurich, Zurich, Switzerland
Passive haptics, also known as tactile augmentation, denotes the use of a physical counterpart to a virtual environment to provide tactile feedback. Employing passive haptics can result in more realistic touch sensations than those from active force feedback, especially for rigid contacts. However, changes in the virtual environment would necessitate modifications of the physical counterparts. In recent work space warping has been proposed as one solution to overcome this limitation. In this technique virtual space is distorted such that a variety of virtual models can be mapped onto one single physical object. In this paper, we propose as an extension adaptive space warping; we show how this technique can be employed in a mixed-reality surgical training simulator in order to map different virtual patients onto one physical anatomical model. We developed methods to warp different organ geometries onto one physical mock-up, to handle different mechanical behaviors of the virtual patients, and to allow interactive modifications of the virtual structures, while the physical counterparts remain unchanged. Various practical examples underline the wide applicability of our approach. To the best of our knowledge this is the first practical usage of such a technique in the specific context of interactive medical training.
Haptic interfaces, Avatars, Bones, Geometry, Joints, Surgery, Shape,surgical training simulation., Virtual reality, passive haptics
Jonas Spillmann, S. Tuchschmid, M. Harders, "Adaptive Space Warping to Enhance Passive Haptics in an Arthroscopy Surgical Simulator", IEEE Transactions on Visualization & Computer Graphics, vol.19, no. 4, pp. 626-633, April 2013, doi:10.1109/TVCG.2013.23
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