In this talk, we present a general framework developed at HP Labs called Pluribus (http://hpl.hp.com/research/pluribus) for the modeling and optimization of scalable multi-projector displays. Based on this framework, we derive algorithms that can robustly optimize the visual quality of an arbitrary combination of projectors without manual adjustment.
When the projectors are tiled, we show that our framework automatically produces blending maps that outperform state-of-the-art projector blending methods. When all the projectors are superimposed, the framework can produce high-resolution images beyond the Nyquist resolution limits of component projectors. When a combination of tiled and superimposed projectors are deployed, the same framework harnesses the best features of both tiled and superimposed multi-projector projection paradigms. The framework creates for the first time a new unified paradigm that is agnostic to a particular configuration of projectors yet robustly optimizes for the brightness, contrast, and resolution of that configuration.
In addition, we demonstrate that our algorithms support high resolution video at real-time interactive frame rates achieved on commodity graphics platforms. This work allows for inexpensive, compelling, flexible, and robust large scale display systems to be built and deployed very efficiently- Association for Computing Machinery (ACM)
Nelson L. Chang
Nelson L. Chang received his B.S.E. in Electrical Engineering (magna cum laude) from Princeton University, and his M.S. and Ph.D. degrees in Electrical Engineering and Computer Sciences from the University of California at Berkeley. Since 2000, Dr. Chang has been at Hewlett-Packard Labs in Palo Alto, where he is currently a principal research scientist.
His research interests focus on 3-D computer vision and graphics, real-time user interface and interaction, and advanced projector-camera systems. He co-invented (with Niranjan Damera-Venkata) HP's Pluribus multi-projector technology, awarded the Best Paper Award at the 2007 IEEE International Workshop on Projector-Camera Systems (ProCams).
During his seven year tenure at HP Labs, Niranjan Damera-Venkata made key technology contributions to HP's foray into commercial photofinishing with the Indigo press, was a principal inventor of HPs Wobulation technology that is widely used for resolution enhancement in DLP RPTVs, and is a co-inventor (with Nelson Chang) of HP's Pluribus multi-projector display technology.
Niranjan's academic background includes a BS degree in Electronics and Communications Engineering from the University of Madras (INDIA), MS and PhD degrees in Electrical and Computer Engineering from the University of Texas at Austin, and an MS in Management Science and Engineering from Stanford University.