| 1. |
- Bivall Persson, Petter, 1979-, et al.
(författare)
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Improved Feature Detection over Large Force Ranges Using History Dependent Transfer Functions
- 2009
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Ingår i: Third Joint Eurohaptics Conference and Symposium on Haptic Interfaces for Virtual Environments and Teleoperator Systems, WorldHaptics 2009. - : IEEE. - 9781424438587 ; , s. 476-481
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Konferensbidrag (refereegranskat)abstract
- In this paper we present a history dependent transfer function (HDTF) as a possible approach to enable improved haptic feature detection in high dynamic range (HDR) volume data. The HDTF is a multi-dimensional transfer function that uses the recent force history as a selection criterion to switch between transfer functions, thereby adapting to the explored force range. The HDTF has been evaluated using artificial test data and in a realistic application example, with the HDTF applied to haptic protein-ligand docking. Biochemistry experts performed docking tests, and expressed that the HDTF delivers the expected feedback across a large force magnitude range, conveying both weak attractive and strong repulsive protein-ligand interaction forces. Feature detection tests have been performed with positive results, indicating that the HDTF improves the ability of feature detection in HDR volume data as compared to a static transfer function covering the same range.
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| 2. |
- Forsslund, Jonas, et al.
(författare)
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A User Centered Designed FOSS Implementation of Bone Surgery Simulations
- 2009
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Ingår i: Proceedings - 3rd Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, World Haptics 2009. - Piscataway, NJ, USA : IEEE. - 9781424438587 ; , s. 391-392
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Konferensbidrag (refereegranskat)abstract
- Different aspects of bone surgery simulation has been a popular topic in haptics research field. This demonstration paper has two major results: a free and open source software (FOSS) implementation of a well known algorithm for tool-bone interaction force estimation, and an evaluation conducted as part of a suggested User-centered design approach for creation of a surgery simulator targeting Oral Surgery in particular.
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| 3. |
- Lundin Palmerius, Karljohan, et al.
(författare)
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The impact of feedback design in haptic volume visualization
- 2009
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Ingår i: Third Joint EuroHaptics conference, 2009 and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems. World Haptics 2009.. - Piscataway, New Jersey, USA : IEEE. - 9781424438587 ; , s. 154-159
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Konferensbidrag (refereegranskat)abstract
- Enhancing volume visualization with additional cues from our sense of touch has shown the potential to increase both speed and accuracy in the data exploration. Research in the area display a wide array of modes of interaction and many of these have been evaluated to demonstrate their capabilities. There are, however, few studies performed that compare different approaches for their strengths and weaknesses and there is a lack of guidelines on how the haptic feedback should be designed to allow for best performance. This paper describes a study on the influence of the basic principle chosen for data representation on the ability to identify faint structures in the data. Three metaphors are compaired, two types of shape metaphors and one force metaphor. Based on statistical analysis on evaluation data, interviews and observations a set of guidelines on the design of haptic visualization is described.
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