Thesis (Ph. D.)--University of Washington, 2007. / Vita. Includes bibliographical references (p. 117-127).

Thesis (M.Sc.). / Written for the School of Computer Science. Title from title page of PDF (viewed 2009/06/29). Includes bibliographical references.

Thesis (Ph.D.)--Hong Kong University of Science and Technology, 2006. / Includes bibliographical references (leaves 130-138). Also available in electronic version.

Thesis (Ph. D.)--School of Electrical and Computer Engineering, Georgia Institute of Technology, 2004. Directed by Yucel Altunbasak. / Vita. Includes bibliographical references (leaves 110-115).

Thesis (Ph. D.)--University of Washington, 2003. / Vita. Includes bibliographical references (leaves 94-103).

Thesis (Ph. D.)--Princeton University, 1997.

This paper and the accompanying project Amechan explore the construction of 'virtual' identity on the Internet. It explores historic art trails and how they lead to the new frontier of web art, moving from the traditional arts to television, video to the Internet. It explores the need for alternative forms of art practice and art dissemination in contemporary society and it looks at what makes web art unique. It also explores the alternate realms of reality; our physical world, and the new world of the virtual. And how this has affected our notions of self, privacy, and narrative. And finally, it explains the construction of the Amechan site, both theoretically and practically. The paper has been divided into three parts. The first sites the work within current art practices. The second places Amechan into the context of the author's art practice. The third section looks at the elements and themes contained within the Amechan site, which was a serialized 'homepage' created by a fictional character, a diaristic narrative of image and text. The site initially ran from February 1-July 31, 1999. The section also discusses the ideas that have informed the site in less discernible ways. It looks at the theoretical and practical concerns of creating and maintaining the site for the 6 months it was initially operating, and at the site as 'installation'. It also introduces an email correspondence between the fictional character of 'Amechan' and an unknown correspondent. / Master of Arts

Thesis (Ph.D.)--Australian Defence Force Academy, School of Electrical Engineering, 2003. / "October 2002 (Revised May 2003)"--T.p. Includes bibliographical references (leaves 256-264).

abstract: Today's mobile devices have to support computation-intensive multimedia applications with a limited energy budget. In this dissertation, we present architecture level and algorithm-level techniques that reduce energy consumption of these devices with minimal impact on system quality. First, we present novel techniques to mitigate the effects of SRAM memory failures in JPEG2000 implementations operating in scaled voltages. We investigate error control coding schemes and propose an unequal error protection scheme tailored for JPEG2000 that reduces overhead without affecting the performance. Furthermore, we propose algorithm-specific techniques for error compensation that exploit the fact that in JPEG2000 the discrete wavelet transform outputs have larger values for low frequency subband coefficients and smaller values for high frequency subband coefficients. Next, we present use of voltage overscaling to reduce the data-path power consumption of JPEG codecs. We propose an algorithm-specific technique which exploits the characteristics of the quantized coefficients after zig-zag scan to mitigate errors introduced by aggressive voltage scaling. Third, we investigate the effect of reducing dynamic range for datapath energy reduction. We analyze the effect of truncation error and propose a scheme that estimates the mean value of the truncation error during the pre-computation stage and compensates for this error. Such a scheme is very effective for reducing the noise power in applications that are dominated by additions and multiplications such as FIR filter and transform computation. We also present a novel sum of absolute difference (SAD) scheme that is based on most significant bit truncation. The proposed scheme exploits the fact that most of the absolute difference (AD) calculations result in small values, and most of the large AD values do not contribute to the SAD values of the blocks that are selected. Such a scheme is highly effective in reducing the energy consumption of motion estimation and intra-prediction kernels in video codecs. Finally, we present several hybrid energy-saving techniques based on combination of voltage scaling, computation reduction and dynamic range reduction that further reduce the energy consumption while keeping the performance degradation very low. For instance, a combination of computation reduction and dynamic range reduction for Discrete Cosine Transform shows on average, 33% to 46% reduction in energy consumption while incurring only 0.5dB to 1.5dB loss in PSNR. / Dissertation/Thesis / Ph.D. Electrical Engineering 2012

A new test set design and benchmarking approach (US Patent pending) allows a "standard observer" to assess the end-to-end image quality characteristics of video imaging systems operating in day time or low-light conditions. It uses randomized targets based on extensive application of Photometry, Geometrical Optics, and Digital Media. The benchmarking takes into account the target’s contrast sensitivity, its color characteristics, and several aspects of human vision such as visual acuity and dynamic response. The standard observer is part of the "extended video imaging system" (EVIS). The new test set allows image quality benchmarking by a panel of standard observers at the same time. The new approach shows that an unbiased assessment can be guaranteed. Manufacturers, system integrators, and end users will assess end-to-end performance by simulating a choice of different colors, luminance levels, and dynamic conditions in the laboratory or in permanent video systems installations.