Hasso-Plattner-Institut
Prof. Dr. Jürgen Döllner
  
 

Sebastian Pasewaldt

Tel.: +49-(0)331 5509-3908
Fax: +49-(0)331 5509-172
Room: H-2.26
E-Mail: sebastian.pasewaldt@hpi.de

Research interests

  • 3D virtual city and landscape models
  • Interactive map-like 3D representations
  • Non-linear projections
  • Cognitive processing of 3D city models

Publications

Interactive Image Filtering with Multiple Levels-of-Control on Mobile Devices

Semmo, Amir; Dürschmid, Tobias; Trapp, Matthias; Klingbeil, Mandy; Döllner, Jürgen; Pasewaldt, Sebastian in Proceedings ACM SIGGRAPH Asia Symposium on Mobile Graphics and Interactive Applications 2016 .

With the continuous development of mobile graphics hardware, interactive high-quality image stylization based on nonlinear filtering is becoming feasible and increasingly used in casual creativity apps. However, these apps often only serve high-level controls to parameterize image filters and generally lack support for low-level (artistic) control, thus automating art creation rather than assisting it. This work presents a GPU-based framework that enables to parameterize image filters at three levels of control: (1) presets followed by (2) global parameter adjustments can be interactively refined by (3) complementary on-screen painting that operates within the filters' parameter spaces for local adjustments. The framework provides a modular XML-based effect scheme to effectively build complex image processing chains-using these interactive filters as building blocks-that can be efficiently processed on mobile devices. Thereby, global and local parameterizations are directed with higher-level algorithmic support to ease the interactive editing process, which is demonstrated by state-of-the-art stylization effects, such as oil paint filtering and watercolor rendering.
sdtkdp2016_teaser.jpg
asemmo-mgia2016-authors-version.pdf
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Talks

  • "Multiscale Visualization of 3D Geovirtual Environments Using View-Dependent Multi-Perspective Views" at the WSCG 2011, Plzen - Czech Republic (02/2011)
  • "Multiscale, Multi-Perspective Visualization of 3D City Models in Immersive Environments" at the opening ceremony of the 3D Lab Golm, Potsdam - Germany (06/2011)
  • "Multiperspective Visualizations of 3D Geovirtual Environments" - Joint Workshop of the HPI Research School for "Service-Oriented Systems Engineering", Cape Town - South Africa (04/2012)
  • "Towards Comprehensible Digital 3D Maps" - Symposium on Service-Oriented Mapping 2012 (SOMAP 2012), Vienna - Austria (11/2012)
  • "A Service-Oriented Platform for Interactive 3D Web Mapping" - Symposium on Service-Oriented Mapping 2012 (SOMAP 2012), Vienna - Austria (11/2012)
  • "Towards Comprehensible Service-Based 3D Maps" - HPI Symposium@SAP, Walldorf - Germany (12/2012)
  • "Potentials of and Approaches for Multi-Perspective Visualization of 3D Spatial Models", GeoViz 2013, Hamburg - Germany (03/2013)

Teaching activities

Winter term 2010/11

  • lecture "Informationsvisualisierung (informationvisualization) " (tutor)
  • course "Advanced Visualizationtechniques" (tutor)
  • pupils academy (co-lecturer)

Summer term 2011

  • lecture "Geovisualization" (tutor)

Winter term 2011/12

  • course "Realtime Rendering" (tutor)
  • pupils academy (co-lecturer)

Summer term 2012

  • course "Algorithmic Geometry" (tutor)
  • course "Geovisualization Techniques" (tutor)

Winter term 2012/13

  • course "Game Programming" (tutor)
  • course "Concepts and Techniques for 3D Visualization"
  • pupils academy (co-lecturer)

Summer term 2013

  • lecture "Geovisualization" (co-lecturer)
  • lecture "Interfaces of Geoinformation and Geocommunication" (tutor)