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High dynamic range display systems (HDRI):
Mimicking reality, from capture to display
Wednesday October 20, 2004 — 7:30 PM
HDRI stands for high dynamic range imaging, and has become an important concept in computer graphics. HDR images store more information about light than regular images, and can be used to transfer lighting between real life and CG characters or worlds. In this talk, Joe Crawford will discuss practical ways to use HDRI, and the important work of Paul Debevec. Creating and editing HDR images will be discussed using Cinepaint and HDR shop.
The dynamic range of many real-world environments exceeds the capabilities of current display technology by several orders of magnitude. In this talk, Wolfgang Heidrich will discuss the design of two different display systems that were developed in collaboration between UBC Physics & Astronomy, Sunnybrook Technologies, and his group in UBC Computer Science.
These displays are capable of displaying images with a dynamic range much more similar to that encountered in the real world. The first display system is based on a combination of an LCD panel and a DLP projector, and can be built from off-the-shelf components. While this design is feasible in a lab setting, the second display system, which relies on a custom-built LED panel instead of the projector, is more suitable for usual office workspaces and commercial applications. He will describe the design of both systems as well as the software issues that arise. He will also discuss the advantages and disadvantages of the two designs and potential applications for both systems.
BIOS
Wolfgang Heidrich is an Associate Professor in Computer Science at the University of British Columbia. He received a PhD in Computer Science from the University of Erlangen in 1999, and then worked as a Research Associate at the Computer Graphics Group of the Max-Planck-Institute for Computer Science in Saarbrucken, Germany, where he lead the research efforts in hardware-accelerated and image-based rendering. Heidrich's research interests lie in computer graphics, computer vision, and imaging. In particular, he has worked on image-based modeling, measuring, and rendering, geometry acquisition, hardware-accelerated and image-based rendering, and global illumination. Heidrich has written over 60 refereed publications on these subjects and has served on numerous program committees. He was the program co-chair for Graphics Hardware 2002, and Graphics Interface 2004, and he is a co-author of the recently published book "Real-Time Shading".
UBC HDRDisplay website
Sunnybrook Technologies' mission is to commercialize a UBC-invented display technology which dramatically improves upon the performance of existing Liquid Crystal Displays (LCDs).
The technology was developed over a six-year period at the Structuced Surface Physics Laboratory of the University of British Columbia. Sunnybrook has built "Proof of Concept" systems and prototypes are being tested in consumer and research environments such as the Vancouver General Hospital and the Centre of Vision Research in York. Sunnybrook is currently collaborating with several component manufacturers to finish the development of key elements of the HDR technology. Initial product release for the HDR display in speciality markets is planned for the end of 2004.
www.sunnybrooktech.com
Joe Crawford is the owner of Joetainment Enterprises and an instructor at Emily Carr Institute and the Vancouver Institute of Media Arts. Joetainment Enterprises specializes in commercial graphics/animation production, software development and education. At Joetainment Enterprises, HDRI is often part of the production workflow, and has dramatically increased the realism achievable in deadline driven CG work.
www.joetainment.com
© 2005 · Vancouver ACM SIGGRAPH · info@siggraph.ca
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