Zwicker2008SPM - [Matthias Zwicker, Anthony Vetro, Sehoon...

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© BRAND X PICTURES Digital Object Identifier 10.1109/MSP.2007.905708 IEEE SIGNAL PROCESSING MAGAZINE [ 88 ] NOVEMBER 2007 1053-5888/07/$25.00©2007IEEE M ultiview three-dimensional (3-D) displays offer viewing of high-resolution stereoscopic images from arbitrary positions without glasses. Such displays consist of view-dependent pixels that reveal a different color according to the viewing angle. Therefore, the left and right eye of an observer see slightly dif- ferent images on the screen. This leads to the perception of 3-D depth and parallax effects when the observer moves. Although the basic optical principles of multiview auto-stereoscopy have been known for over a century [21], only recently displays with increased resolution, or systems based on multiple projectors, have made this approach practical. Today, commercial availability ranges from multiview desktop monitors [19] to large-scale displays based on multiprojector systems [1], [11]. [ Matthias Zwicker, Anthony Vetro, Sehoon Yea, Wojciech Matusik, Hanspeter Pfister, and Frédo Durand ] Resampling, Antialiasing, and Compression in Multiview 3-D Displays [ Addressing signal processing challenges ]
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View-dependent pixels can be implemented, for example, using conventional high-resolution displays and parallax barri- ers as shown in Figure 1. Other technologies include lenticular sheets and holographic screens [16]. Each view-dependent pixel can be thought of as emitting a small number of light rays in a set of discrete viewing directions, typically between eight and a few dozen. Often these directions are distributed in a horizontal plane, such that parallax effects are limited to horizontal motion of the observer. Figure 1 depicts a single scanline of a horizon- tal-parallax-only display. Multiview 3-D displays feature a number of advantages over competing auto-stereoscopic display technologies, such as stereo-projection systems using shuttered or polarized glasses. Most important, multiview 3-D displays do not require users to wear any special glasses, which leads to a more natural and unrestricted viewing experience. They also do not require head tracking to provide motion parallax; instead, they provide accu- rate perspective views from arbitrary points inside a viewing frustum simultaneously. They are truly multiuser capable, since none of the display parameters needs to be adjusted to an indi- vidual user. For these reasons, we believe that multiview 3-D displays will become the device of choice for a large number of applications such as scientific and medical visualization or remote collaboration. They have the potential to replace conven- tional two-dimensional (2-D) displays in the mass markets of digital entertainment. In this article we survey recent advances that address signal processing challenges of multiview 3-D displays. In particular, effective signal processing algorithms are fundamental to display data at the highest quality without aliasing problems. They are also crucial to compress data effectively with minimal artifacts. At
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This note was uploaded on 05/20/2011 for the course CAP 6701 taught by Professor Staff during the Spring '08 term at University of Florida.

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Zwicker2008SPM - [Matthias Zwicker, Anthony Vetro, Sehoon...

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