Hasso-Plattner-Institut
  
Hasso-Plattner-Institut
Prof. Dr. Jürgen Döllner
  
 
Matthias Trapp

Contact

Tel.: +49-(0)331 5509-3913
Fax: +49-(0)331 5509-172
Room: H-2.28
E-Mail: matthias.trapp(at)hpi.de

 

Research Interests

Publications

A Concept of Effective Landmark Depiction in Geovirtual 3D Environments by View-Dependent Deformation

Glander, Tassilo and Trapp, Matthias and Döllner, Jürgen
In 4th International Symposium on LBS and Telecartography, 2007 CD proceedings

Abstract:

Landmarks represent elements of geovirtual 3D environments with outstanding importance for user orientation. Especially, they facilitate navigation and exploration within virtual 3D city models. This paper presents a novel concept for the real-time depiction of landmarks that effectively emphasizes these 3D objects by improving their visibility with respect to their surrounding areas and the current 3D viewing settings. The concept is based on scaling landmark geometry according to an importance function while simultaneously adjusting the corresponding surrounding region. The amplification of landmarks takes into account the current camera parameters. To reduce visual artifacts caused by this multi-scale presentation, e.g., geometry intersections, the surrounding objects of each landmark are adapted according to a deformation field that encodes the displacement and scaling transformations. An individual weight coefficient can be defined that denotes the landmark’s importance. To render a collection of weighted landmarks within a virtual 3D city model, the technique accumulates their associated, weighted deformation fields in a view-dependent way. Our concept provides a flexible solution for the importance-driven enhancement of objects within interactive geovirtual 3D environments and aims at improving the perceptual and cognitive quality of their display. In particular, the concept can be applied to systems and applications that use abstracted, generalized virtual 3D city models such as in the fields of car and pedestrian navigation, disaster management, and spatial data mining.

Keywords:

Visualization, Smart Environments and Landmarks, Navigation Systems

BibTeX file

@inproceedings{GTD07a,
author = { Glander, Tassilo and Trapp, Matthias and D{\"o}llner, J{\"u}rgen },
title = { A Concept of Effective Landmark Depiction in Geovirtual 3D Environments by View-Dependent Deformation },
year = { 2007 },
month = { 0 },
abstract = { Landmarks represent elements of geovirtual 3D environments with outstanding importance for user orientation. Especially, they facilitate navigation and exploration within virtual 3D city models. This paper presents a novel concept for the real-time depiction of landmarks that effectively emphasizes these 3D objects by improving their visibility with respect to their surrounding areas and the current 3D viewing settings. The concept is based on scaling landmark geometry according to an importance function while simultaneously adjusting the corresponding surrounding region. The amplification of landmarks takes into account the current camera parameters. To reduce visual artifacts caused by this multi-scale presentation, e.g., geometry intersections, the surrounding objects of each landmark are adapted according to a deformation field that encodes the displacement and scaling transformations. An individual weight coefficient can be defined that denotes the landmark’s importance. To render a collection of weighted landmarks within a virtual 3D city model, the technique accumulates their associated, weighted deformation fields in a view-dependent way. Our concept provides a flexible solution for the importance-driven enhancement of objects within interactive geovirtual 3D environments and aims at improving the perceptual and cognitive quality of their display. In particular, the concept can be applied to systems and applications that use abstracted, generalized virtual 3D city models such as in the fields of car and pedestrian navigation, disaster management, and spatial data mining. },
note = { CD proceedings },
keywords = { Visualization, Smart Environments and Landmarks, Navigation Systems },
booktitle = { 4th International Symposium on LBS and Telecartography },
priority = { 0 }
}

Copyright Notice

Eurographics Association Copyright Notice: Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than Eurographics must be honored. Springer-Verlag Copyright Notice: The Author may publish his/her contribution on his/her personal Web page provided that he/she creates a link to the above mentioned volume of LNCS at the Springer-Verlag server or to the LNCS series Homepage (URL: http://www.springer.de/comp/lncs/index.html) and that together with this electronic version it is clearly pointed out, by prominently adding "© Springer-Verlag", that the copyright for this contribution is held by Springer. IEEE Copyright Notice: This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org.

last change: Mon, 17 Aug 2009 10:23:08 +0200

Professional Activities

  • Peer-Reviewing Activities for Journals:
    Journal on Location-based Services, International Journal of Geographical Information Science, IEEE Transactions on Circuits and Systems for Video Technology, IEEE Signal Processing Letters, Computer Graphics Forum
  • Peer-Reviewing Activities for Conferences:
    Web3D 2014, EuroVis 2014, WSCG 2013, SOMAP 2012, EG 2012, WSCG 2012, WSCG 2011, IEEE Vis 2009
  • Other Activities:
    Conference Session Chair (Rendering), GRAPP 2009/2015; Member of ACM/SIGGRAPH and EuroGraphics

Teaching

Courses at HPI (Responsible for lecturing and grading) 

  • Sommer 2015 (M): Introduction to Visualization
  • Winter 2014/2015 (B): Computer Graphics II
  • Winter 2013/2014 (B): Computer Graphics II
  • Summer 2013 (M): Geovisualization

Courses at HPI (Responsible for lecturing and tutoring)  

  • Summer 2012 (B): Computer Graphics I
  • Winter 2011/2012 (B): Computer Graphics II
  • Summer 2010 (B): Programming of 3D Applications
  • Winter 2009/2010 (M): Geovisualization II
  • Summer 2009 (M): Geovisualization I 
  • Summer 2008 (M): Rendering Techniques

Courses at University of Potsdam (Responsible for lecturing and tutoring)  

  • Winter 2002/2003: Operating Systems II
  • Summer 2002: Operating Systems I

Seminars at HPI (Responsible for lecturing, tutoring, and grading)

  • Winter 2015/2016 (B): Image and Videoprocessing using OpenGL ES for Mobile Devices
  • Summer 2015 (M): Spatial Analytics
  • Winter 2014/2015 (M): Geoinformation Technologies
  • Summer 2014 (M): Information Visualization
  • Winter 2013/2014 (M): Information Visualization
  • Summer 2013 (M): Geovisualization
  • Winter 2012/2013 (M): Concepts and Techniques of 3D-Visualization
  • Summer 2011 (M): Multimedia/Graphics Libraries & Systems
  • Winter 2010/2011 (B): Game Programming
  • Summer 2010 (M): Information and Geovisualization
  • Winter 2009/2010 (B): Game Programming
  • Winter 2008/2009 (M): Focus+Context Visualization in 3D Geovirtual Environments
  • Winter 2007/2008 (B): Seminar & Lab Computer graphics Systems/VRS
  • Summer 2007 (B): Seminar & Lab Computer graphics Systems/VRS

Students (Co-)Supervised:

  • Natural Phenomena as Metaphors for Visualization of Trend Data in Interactive Software Maps
    Hannes Würfel, Master Thesis, 2015
  • A GPU-based  rendering Technique for Interactive Video Deformation
    Benjamin-Heinz Meier, Master Thesis, 2015
  • Interactive Rendering Techniques for Focus+Context Visualization of virtual 3D Indoor Models, Alessandro Florio, Master Thesis, 2014
  • Concepts and Rendering Techniques for Level-of-Abstraction Transitions of 3D Geovirtual Environments, Amir Semmo, Master Thesis, 2011
  • Generalization of Street Networks as Strategy to Reduce Cognitive Efforts in Map Reading, Daryna Bronnykova, Master Thesis, 2011
  • View-dependent Global Deformations, for 3D Geovirtual Environments of Virtual 3D Landscape and City Models, Sebastian Pasewaldt, Master Thesis, 2010
  • Rendering von generalisierter Tiefenschärfe in interaktiven 3D virtuellen Umgebungen, Christian Beesk, Master Thesis, 2010
  • Generierung und Parametrisierung von 3D-Gebäudegeometrienin virtuellen 3D-Stadtmodellen, Mathias Pietsch, Diploma Thesis, 2007

Invited Talks

  • Programmable Rendering Pipelines and Interactive Visualization, Invited Talk at the Department of Computer Graphics, Institute for Computer Science, Rostock/Germany, 2014
  • Neighborhood Visualization – Challenges and Approaches from a Geovisualization Perspective, Blankensee Colloquium 2012: Neighborhood Technologies Media and Mathematics of Dynamic Networks, Berlin/Germany
  • Colonia3D – Potenziale interaktiver Kommunikation von digitaler Denkmalpflege in öffentlichen Räumen, Prometheus Conference 2011, University of Cologne, Cologne/Germany
  • Kommunikation von digitaler Denkmalpflege in öffentlichen Räumen am Beispiel des Projektes Colonia3D, Invited Talk at the Department of Photogrammetry & Laserscanning at the HCU (HafenCity University), Hamburg/ Germany
  • High-Level Vector Editing, Invited Talk at the Computer Science Department of the Courant Institute of Mathematical Sciences at New York University, New York/USA, 2010

Conference Talks

 2015 

 2013 

2011

  • Integration von Fachinformationen in 3D-Darstellungen, Xinnovations 2011, E-City Forum, September, Berlin/Germany
  • Colonia3D, Kultur und Informatik - Multimediale Systeme, May 2011, Berlin/Germany

2010

2009

2008

2007

  • A Concept of Effective Landmark Depiction in Geovirtual 3D Environments by View-Dependent Deformation, 4th International Symposium on LBS and Telecartography, October, Hong Kong
  • Automated Combination of Real-Time Shader Programs, Eurographics conference, September, Prague, Czech Republic

2005

  • Evolutionary Algorithms, Stanislaw Lem Workshop on Evolution, October, Lviv (Lemberg), Ukraine

Awards & Honors & Miscellaneous

  • Cover Image Selection, Proceedings of TPCG 2013, 2013
  • Cover Image Selection, International Journal of Heritage in the Digital Era, vol. 1, no. 1, 2012.
  • Cover Image Selection, gis.SCIENCE Journal, vol. 25, no. 1, 2012
  • Best Paper Award, EuroMed 2010 Conference, Communication of Digital Cultural Heritage in Public Spaces by the Example of Roman Cologne
  • 2009 Best Paper Selection, LBS & Telecartography Conference, Strategies for Visualizing Points-of-Interest of 3D Virtual Environments on Mobile Devices
  • 2008 Best Paper Award, AGILE 2008 Conference, Interactive Multi-Perspective Views of Virtual 3D Landscape and City Models
  • Best Paper Selection, GRAPP 2008 Conference, Generalization Approach for 3D Viewing Deformations of Single-Center Projections