High-Dynamic-Range Imaging: Improvements and Limits after More than 20 Years of Research
Instructors: Alessandro Rizzi, University of Milano, and John J. McCann, McCann Imaging
Level: Intermediate
Duration: 2 Hours
Course Time:
     New York: 21 October 2021, 10:00 - 12:15
     Paris: 21 October 2021, 16:00 - 18:15
     Tokyo: 21 October 2021, 23:00 - 22 October 2021 01:15

Benefits:
Attendees will be able to:

• Develop a complete understanding of various approaches to HDR, including characteristics, advantages, limits, and overlap.
• Measure the optical limits in acquisition and display.
• Discuss and compare the 3 possible goals of HDR imaging.
• Evaluate the accuracy of scene capture.
• Evaluate the effects of HDR on the vision system.
• Discuss current HDR TV systems and standards.
• Understand the aspect involved in designing HDR applications, from content creation to the visualization at the end of the pipeline.

Course Description
HDR imaging is a continuously evolving field of research, started more than twenty years ago. Today, the evolution continues in the production of HDR televisions and standards for HDR video media formats. This course reviews the three possible goals of HDR imaging: reproducing light field, reproducing appearance, and improving image aesthetic and visibility. For each goal, a careful analysis of characteristics, limits, and ground truth are presented. The course aims at replacing myths with measurements about the limits of accurate camera acquisition (range and color) and the usable range of light for displays presented to human vision. It discusses the principles of tone rendering and the role of vision in the process.

Intended Audience: any student or scholar that has to deal with HDR in its many fields of application in computer vision, e.g., medical imaging, advanced learning, technology of displays, video.

Alessandro Rizzi is a full professor in the department of computer science at the University of Milano. He is one of the founders of the Italian Color Group, secretary of CIE Division 8, and an IS&T Fellow and past vice president. In 2015 he received the Davies medal from the Royal Photographic Society. He is co-chair of the Color Imaging: Displaying, Processing, Hardcopy, and Applications Conference at the IS&T Electronic Imaging Symposium; topical editor for Journal of Optical Society of America; and a topical editor and associate editor of Journal of Electronic Imaging.

John McCann worked in and managed Polaroid's Vision Research Laboratory (1961-1996). He studied Retinex theory, color constancy, color from rod/cone interactions at low light levels, image reproduction, appearance with scattered light, cataracts, and HDR imaging. He is a Fellow of IS&T and the Optical Society of America (OSA); a past president of IS&T and the Artists Foundation, Boston; IS&T/OSA 2002 Edwin Land Medalist and IS&T 2005 Honorary Member.

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