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max planck institut informatik
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Grzegorz Krawczyk

Grzegorz Krawczyk

Max-Planck-Institut für Informatik
Department 4: Computer Graphics

Ph.D. candidate - Computer Science - Graduated November 2007.

Email: krawczyk [at] mpi-inf.mpg.de

LinkedIn Profile

Summary

During the years 2003 - 2007 I was a researcher and Ph.D. candidate at Max-Planck-Institut für Informatik under the supervision of Karol Myszkowski in the field of high dynamic range (HDR) image and video processing. My research was focused on tone mapping algorithms in the context of human visual perception. I was also involved in the acquisition of HDR content and in the projects where such HDR content enable realisitc rendering for mixed-reality applications. Currently, I am working at the European Patent Office.

PhD Thesis


Perception-inspired Tone Mapping
Thesis for obtaining the title of Doctor of Engineering (Doktor der Ingenieurwissenschaften).

Grzegorz Krawczyk
November 2007, Saarbrücken, Germany.
pdf  mpi catalogue 

The display of high dynamic range images and video requires a tone mapping algorithm to depict their original appearance on existing display devices whose capabilities in terms of dynamic range are insufficient. The insightful application of knowledge about human visual system can assure high fidelity of depiction in such an algorithm.

In this thesis, we design new tone mapping models and improve existing algorithms by an informed use of human perception to provide a high fidelity depiction of high dynamic range. We develop a real-time tone mapping solution which reproduces the subjective appearance of dynamic HDR contents by accounting for perceptual effects that significantly contribute to the appearance of natural scenes. We design a computational model of lightness perception that can be applied to high quality tone mapping for static images to reproduce their original HDR appearance in terms of lightness. We identify common distortions typical to tone mapping which may hinder the comprehension of image contents, we design appropriate metrics to measure the perceived magnitude of these distortions and evaluate existing tone mapping algorithms accordingly. To compensate for observed distortions, we introduce a method which improves the tone mapping results beyond numerically optimized solution by using techniques strongly based on perception of contrasts. Presented solutions can be efficiently integrated in varied HDR applications including photography, playback of HDR video, image synthesis, light simulations, predictive rendering, and computer games.

Thesis available for download in pdf.


Projects



Tutorials & Books


High Dynamic Range Video
Karol Myszkowski, Rafal Mantiuk, Grzegorz Krawczyk
In: Synthesis Lectures on Computer Graphics and Animation, 2008.
Morgan & Claypool Publishers.
publisher page
HDR Tone Mapping
Grzegorz Krawczyk, Karol Myszkowski, Daniel Brosch
In: Bernd Hoefflinger, editor: High-Dynamic-Range (HDR) Vision.
Springer Series in Advanced Microelectronics (26), 2007.
publisher page
High Dynamic Range Techniques in Graphics: from Acquisition to Display
Michael Goesele, Wolfgang Heidrich, Bernd Hoefflinger, Grzegorz Krawczyk, Karol Myszkowski, Matthew Trentacoste
Organizers: Karol Myszkowski (MPI), Wolfgang Heidrich (UBC)
In: EUROGRAPHICS 2005, Tutorial 7, 2005.
tutorial page  hdr resources

Publications


Contrast Restoration by Adaptive Countershading
Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of EUROGRAPHICS '07 (Computer Graphics Forum, vol. 26), 2007. 2nd Best Paper Award.
project page
Brightness Adjustment for HDR and Tone Mapped Images
Grzegorz Krawczyk, Rafal Mantiuk, Dorota Zdrojewska, Hans-Peter Seidel,
In: Proc. of Pacific Graphics 2007 (IEEE Computer Society), 2007.
publisher page
High Dynamic Range Imaging Pipeline: Perception-motivated Representation of Visual Content
Rafal Mantiuk, Grzegorz Krawczyk, Radoslaw Mantiuk, Hans-Peter Seidel,
In: Proc. of IS&T/SPIE's Human Vision and Electronic Imaging, 2007.
project page spie library
Beyond Tone Mapping: Enhanced Depiction of Tone Mapped HDR Images
Kaleigh Smith, Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of EUROGRAPHICS '06 (Computer Graphics Forum, vol. 25), 2006.
project page
Computational Model of Lightness Perception in High Dynamic Range Imaging
Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of IS&T/SPIE's Human Vision and Electronic Imaging, 2006.
project page spie library
Lightness Perception in Tone Reproduction for High Dynamic Range Images
Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of EUROGRAPHICS '05 (Computer Graphics Forum, vol. 24), 2005.
project page
Perceptual Effects in Real-time Tone Mapping
Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of Spring Conference on Computer Graphics, 2005. 1st Best Paper Award.
project page  acm library
Interactive System for Dynamic Scene Lighting using Captured Video Environment Maps
Vlastimil Havran, Miloslaw Smyk, Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of 16th Eurographics Symposium on Rendering, 2005.
project page
Perception-motivated High Dynamic Range Video Encoding
Rafal Mantiuk, Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of SIGGRAPH '04 (Special issue of ACM Transactions on Graphics), 2004.
project page  acm library
A CAVE System for Interactive Modeling of Global Illumination in Car Interior
Kirill Dmitriev, Thomas Annen, Grzegorz Krawczyk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of ACM Symposium on Virtual Reality Software and Technology, 2004.
acm library
Poster abstract: Lightness Perception Inspired Tone Mapping
Grzegorz Krawczyk, Rafal Mantiuk, Karol Myszkowski, Hans-Peter Seidel,
In: Proc. of ACM Symposium on Applied Perception in Graphics and Visualization, 2004.
acm library

Education

Max-Planck-Institut für Informatik - Saarbrücken, Germany
Ph.D. candidate - Computer Science - Graduated November 2007.
Research in Computer Graphics in the AG4 group under the supervision of Karol Myszkowski.

Szczecin University of Technology - Szczecin, Poland
Master of Science - Computer Science - Graduated September 2003.
Research in tone mapping operators for static images and animations under the supervision of Karol Myszkowski.

Links


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