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Direct Volume Haptics for Visualization
Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.ORCID iD: 0000-0003-2429-0842
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Visualization is the process of making something perceptible to the mind or imagination. The techniques for producing visual imagery of volumetric data have advanced immensely during the last decades to a point where each produced image can include an overwhelming amount of information. An increasingly viable solution to the limitations of the human sense of visual perception is to make use of not only vision, but also additional senses.

This thesis presents recent work on the development of principles and algorithms for generating representations of volumetric data through the sense of touch for the purpose of visualization. The primary idea introduced in this work is the concept of yielding constraints, that can be used to provide a continuous set of shapes as a representation of features of interest in various types of volumetric data. Some of the earlier identified standard human exploratory procedures can then be used which enables natural, intuitive and effective interaction with the data. The yielding constraints concept is introduced, and an algorithm based on haptic primitives is described, which forms a powerful yet versatile implementation of the yielding constraints. These methods are also extended to handle time-varying, moving and low quality data. A framework for multimodal visualization has been built on the presented methods, and this is used to demonstrate the applicability and versatility of the work through several example applications taken from different areas.

Place, publisher, year, edition, pages
Linköping: Institutionen för teknik och naturvetenskap , 2007. , 76 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 0345-7524
Keyword [en]
Haptic Visualization, Volumetric Data, Haptic Primitives, Shape Representations, Time-varying Data
National Category
Computer Engineering
Identifiers
URN: urn:nbn:se:liu:diva-8771ISBN: 978-91-85831-98-2 (print)OAI: oai:DiVA.org:liu-8771DiVA: diva2:23459
Public defence
2007-05-25, K1, Kåkenhus, Campus Norrköping, Linköpings universitet, Norrköping, 14:15 (English)
Opponent
Supervisors
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2015-09-22
List of papers
1. Proxy-based Haptic Feedback from Volumetric Density Data
Open this publication in new window or tab >>Proxy-based Haptic Feedback from Volumetric Density Data
2002 (English)In: Proceedings of the Eurohaptics Conference, 2002, 104-109 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper a new approach to volume haptics is presented. The developed method makes use of a proxy that is constrained by ‘virtual surfaces’, defined by the local gradient at the proxy position, and not by iso-values as in other approaches to volume haptics. By using a proxy, material properties like friction, stiffness and surface penetrability can be implemented. These material properties are controlled by user defined transfer functions. At the same time, using the gradient to define surfaces, rendering of infinitesimally close virtual surfaces that can be penetrated, is made possible. The algorithm exhibits very high stability, is fast and represents fine details accurately. Compared to earlier techniques, less artifacts occur and higher configurability is provided.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14403 (URN)
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2015-09-22
2. Haptic Visualization of Computational Fluid Dynamics Data Using Reactive Forces
Open this publication in new window or tab >>Haptic Visualization of Computational Fluid Dynamics Data Using Reactive Forces
2005 (English)In: International Conference on Visualization and Data Analysis, San Jose, USA, 2005, 95-102 p.Conference paper, Published paper (Refereed)
Abstract [en]

Datasets from Computational Fluid Dynamics (CFD) can be post-processed and visualized to aid understanding of the flow phenomena present. Visualization of CFD data, however, often suffers from problems such as occlusion and cluttering when methods such as glyphing and volume rendering are applied. In this paper we present a case study where new modes for haptic interaction are used to enhance the exploration of CFD data. A VR environment with interactive graphics and an integrated graphical user interface has been implemented. In contrast to previous work on haptic interaction with CFD data we employ a 'reactive' haptic scheme as opposed to direct force maping. The reactive approach not only generates more stable feedback but also provides clearer and more intuitive cues about the underlying data. Two haptic modes are used to enhance the understanding of different features in the flow data: One presents the orientation of the data and also guides the user to follow the stream as it flows around the aircraft fuselage. The other provides a haptic representation of vortex data. This mode enables the user to perceive and so follow tendencies of vorticity and vortices.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14404 (URN)10.1117/12.587029 (DOI)
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2015-09-22
3. General Proxy-based Haptics for Volume Visualization
Open this publication in new window or tab >>General Proxy-based Haptics for Volume Visualization
2005 (English)In: Eurohaptics Conference, 2005 and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2005., 2005, 557-560 p.Conference paper, Published paper (Refereed)
Abstract [en]

We present a general, proxy-based approach to volume haptics founded upon the notion of 'haptic primitives'. Haptic modes each representing a different aspect of volumetric data, are created by defining sets of haptic primitives which reflect the local properties of the data. The proxy position for every time-frame in the haptic loop is found by balancing the force feedback in the haptic instrument with the force from the haptic primitives involved. The presented general framework allows for rapid development of haptic feedback modes for volumetric data. The approach also allows, in contrast to previous work on proxy-based volume haptics, combination of non-orthogonal constraints and thus allows free combination of various modes in haptic exploration of multivariate data. We demonstrate the effectiveness of our approach through the implementation of five different haptic modes.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14405 (URN)10.1109/WHC.2005.62 (DOI)
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2015-09-22
4. The Orthogonal Constraints Problem with the Constraint Approach to Proxy-based Volume Haptics and a Solution
Open this publication in new window or tab >>The Orthogonal Constraints Problem with the Constraint Approach to Proxy-based Volume Haptics and a Solution
2005 (English)In: SIGRAD 2005, Lund, Sweden, 2005, 45-49 p.Conference paper, Published paper (Refereed)
Abstract [en]

Recently the constraint approach to proxy-based volume haptics was introduced which provided a stable and effective means of conveying information about volumetric data through a haptic instrument. In this paper we present a proof that the approach is incapable of handling nonorthogonal constraints and discuss the implications of this restriction in detail. We also describe how full utilization of haptics applications in which multiple properties are used to enhance the understanding of complex data requires the use of non-orthogonal constraints. We then show how proxybased volume haptics can be modified to allow for general constraints through the introduction of haptic primitives used to model the constraints. By balancing the forces exerted by the primitives on the proxy continuously, nonorthogonal constraints can be handled.

Keyword
Proxy-based volume haptics, orthogonal constraints, haptic primitives
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14406 (URN)
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2015-09-22
5. Enabling Haptic Interaction with Volumetric MRI Data Through Knowledge-based Tissue Separation
Open this publication in new window or tab >>Enabling Haptic Interaction with Volumetric MRI Data Through Knowledge-based Tissue Separation
2006 (English)In: Proceedings of Volume Graphics, 2006, 75-78 p.Conference paper, Published paper (Refereed)
Abstract [en]

Direct volume haptics can provide both guidance and extra information during exploration of volumetric data. In this paper we present a novel approach to volume haptics enabling haptic exploration of tissue shape, borders and material properties in data despite low contrast and low signal to noise ratio, as is common in medical MRI data or low dose CT data. The method uses filtering based on implicit knowledge and addresses the problem of overlapping scalar ranges through the introduction of fuzzy classification and corresponding transfer functions for material properties as well as classification-based distance masking for haptic force direction.

Keyword
volume haptics, MRI, classification
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14407 (URN)10.2312/VG/VG06/075-078 (DOI)
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2015-09-22
6. Enabling design and interactive selection of haptic modes
Open this publication in new window or tab >>Enabling design and interactive selection of haptic modes
Show others...
2007 (English)In: Virtual Reality, ISSN 1359-4338, E-ISSN 1434-9957Article in journal (Refereed) Published
Abstract [en]

The ever increasing size and complexity of volumetric data in a wide range of disciplines makes it useful to augment volume visualization tools with alternative modalities. Studies have shown that introducing haptics can significantly increase both exploration speed and precision. It is also capable of conveying material properties of data and thus has great potential to improve user performance in volume data exploration. In this paper we describe how recent advances in volume haptics can be used to build haptic modes-building blocks for haptic schemes. These modes have been used as base components of a toolkit allowing for more efficient development of haptic prototypes and applications. This toolkit allows interactive construction, configuration and fine-tuning of both visual and haptic representations of the data. The technology is also used in a pilot study to determine the most important issues and aspects in haptic volume data interaction and exploration, and how the use of haptic modes can facilitate the implementation of effective haptic schemes.

Keyword
Volume haptics, Haptic modes, Toolkit, User study
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-35498 (URN)10.1007/s10055-006-0033-7 (DOI)27168 (Local ID)27168 (Archive number)27168 (OAI)
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2017-12-13
7. Fast and High Precision Volume Haptics
Open this publication in new window or tab >>Fast and High Precision Volume Haptics
2007 (English)In: EuroHaptics Conference, 2007 and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems. World Haptics 2007. Second Joint, Los Alamitos, CA, USA: IEEE Computer Society, 2007, 501-506 p.Conference paper, Published paper (Refereed)
Abstract [en]

Volume haptics has shown itself an effective way of enhancing precision and speed in interaction with medical or scientific visualization. This paper presents a mixed solver approach for the primitive-based volume haptics problem, to provide the best performance for every volume haptics application. For situations where the constraints are orthogonal we present a fast and high precision analytical solver. For complex configurations requiring support for non-orthogonal constraints we allow for fall-back on a numerical solver. The results show significantly improved performance with the analytical solver, allowing for higher stiffness and thus feedback of higher quality, while still allowing for transparent support for non-orthogonal constraints.

Place, publisher, year, edition, pages
Los Alamitos, CA, USA: IEEE Computer Society, 2007
National Category
Computer Engineering
Identifiers
urn:nbn:se:liu:diva-14409 (URN)10.1109/WHC.2007.51 (DOI)000246105200083 ()0-7695-2738-8 (ISBN)
Conference
2nd Joint EuroHaptics Conference and Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, Tsukuba, Japan, 22-24 March 2007
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2014-10-08Bibliographically approved
8. Haptic Rendering of Dynamic Volumetric Data
Open this publication in new window or tab >>Haptic Rendering of Dynamic Volumetric Data
2008 (English)In: IEEE Transactions on Visualization and Computer Graphics, ISSN 1077-2626, E-ISSN 1941-0506, Vol. 14, no 2, 263-276 p.Article in journal (Refereed) Published
Abstract [en]

With current methods for volume haptics in scientific visualization, features in time-varying data can freely move straight through the haptic probe without generating any haptic feedback-the algorithms are simply not designed to handle variation with time but consider only the instantaneous configuration when the haptic feedback is calculated. This article introduces haptic rendering of dynamic volumetric data to provide a means for haptic exploration of dynamic behavior in volumetric data. We show how haptic feedback can be produced that is consistent with volumetric data moving within the virtual environment and with data that, in itself, evolves over time. Haptic interaction with time-varying data is demonstrated by allowing palpation of a computerized tomography sequence of a beating human heart.

Keyword
data visualisation, haptic interfaces, natural sciences computing, rendering (computer graphics), virtual reality, computerized tomography sequence, dynamic volumetric data, haptic feedback, haptic rendering, human heart, scientific visualization, time-varying data, virtual environment
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-14410 (URN)10.1109/TVCG.2007.70409 (DOI)
Available from: 2007-05-14 Created: 2007-05-14 Last updated: 2017-12-13

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Lundin Palmerius, Karljohan

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
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  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
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  • text
  • asciidoc
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