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Conferences, Lectures, & Seminars
Events for November
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“Geometric Methods for Brain Image Registration and Signal Analysis”
Tue, Nov 01, 2011 @ 10:00 AM - 11:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Anand A. Joshi, Postdoctoral Associate, Signal and Image Processing Institute, USC
Talk Title: âGeometric Methods for Brain Image Registration and Signal Analysisâ
Abstract: My talk will focus on applications of techniques from Riemannian geometry to signal and image processing, with the emphasis on human brain imaging. Studies of anatomical changes in the brain over time or of differences between populations are often performed to understand changes in disease and development. Such studies require that the imaging data first be registered to a common coordinate system. Registration and analysis of neuroimaging data presents a challenging problem due to the complex folding patterns in the human brain. Specifically, the anatomical and functional brain data is often modeled as a highly convoluted 2D curved image. Since it is non-flat, the non-Euclidean geometry of this data needs to be accounted for performing registration and subsequent signal processing. Techniques from differential geometry offer a powerful set of tools to deal with the convoluted nature of the cortex. I will present a method based on p-harmonic mapping when performing cortical surface parameterization as well as surface and volumetric registration techniques for inter-subject alignment of brains. Furthermore, I will present techniques for filtering, pattern classification and spectral analysis that use the heat kernel and the eigenspectrum of the Laplace-Beltrami operator that forms a basis for analysis on the cortical surface. I will conclude the talk with a description of recent work on the use of brain imaging data to elucidate structural and functional connectivity in the human brain.
Biography: Bio: Dr. Anand Joshi received his B.E. degree in Electronics from Shivaji University and MTech in electrical engineering from Indian Institute of Technology, Kanpur. He also worked for Siemens and later for Sasken. Dr. Joshi received his Ph.D degree in electrical engineering from USC in 2008 followed by postdoctoral training in the Laboratory of Neuro Imaging at UCLA. Dr. Joshi's research interests lie in the area of brain imaging, geometric methods and brain connectivity.
Host: Dr. Alexander A. Sawchuk
More Information: Seminar-Joshi_110111.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Mayumi Thrasher
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Communications, Networks and Systems (CommNetS) Seminar: Decision-making in Decentralized Systems
Wed, Nov 02, 2011 @ 02:00 PM - 03:00 PM
Daniel J. Epstein Department of Industrial and Systems Engineering, Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Ashutosh Nayyar, University of Illinois, Urbana-Champaign
Talk Title: Decision-making in Decentralized Systems
Series: Communications, Networks & Systems (CommNetS) Seminar
Abstract: Decentralized systems are ubiquitous in the modern world. Communication systems, sensor networks, power generation and transmission systems, supply chain networks, economic systems like markets and auctions are all examples of decentralized systems. Such systems are characterized by the presence of multiple decision-making agents with different information. In this talk, I focus on the problem of finding optimal decision-strategies for co-operative agents in a decentralized system. In particular, I consider a decentralized stochastic decision-making problem with multiple decision-makers that share information with each other with a fixed time delay. Such decision problems arise in queuing networks, wired communication networks, distributed control systems, surveillance systems etc. In spite of initial conjectures as early as 1971, finding the general structure of agents' optimal decision-strategies with delayed information sharing had remained an open problem for 40 years. My research provides a conceptual framework that not only identifies the structure of optimal decision strategies but also provides a sequential decomposition of the optimization problem. Moreover, the conceptual methodology developed here is shown to be applicable to a broader class of decentralized decision making problems as well.
Biography: Ashutosh Nayyar received the B. Tech. degree in Electrical Engineering from the Indian Institute of Technology, Delhi, India and M.S. and Ph.D in Electrical Engineering and Computer Science from the University of Michigan, Ann Arbor. He is currently a post-doctoral researcher at Coordinated Science Laboratory at the University of Illinois. His research interests include decentralized stochastic control, stochastic scheduling and resource allocation, controlled sensing in sensor networks, game theory and mechanism design.
Host: Rahul Jain
More Info: http://csi.usc.edu/~dimakis/CommNetS/doku.php?id=decision-making_in_decentralized_systemsLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Rahul Jain
Event Link: http://csi.usc.edu/~dimakis/CommNetS/doku.php?id=decision-making_in_decentralized_systems
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
USC Libraries Discovery Fellows Event
Wed, Nov 02, 2011 @ 04:00 PM - 06:00 PM
Thomas Lord Department of Computer Science, Information Sciences Institute, Ming Hsieh Department of Electrical and Computer Engineering, USC Viterbi School of Engineering
Conferences, Lectures, & Seminars
Speaker: Margaret Wertheim, USC Libraries Inaugual Discovery Fellow
Talk Title: The Marine Sublime
Abstract: Art and science come together in the library as Margaret Wertheim curates The Marine Sublime, her first event as the USC Libraries' inaugural Discovery Fellow.
The event starts at 4:00 p.m. in Doheny Memorial Library's Friends of the USC Libraries Lecture Hall. Wertheim, a science writer, curator, and director of the Institute For Figuring, will moderate a discussion about the intersections of art, science, nature, and culture with filmmaker David Lebrun and independent curator Marina McDougall.
An adjunct professor at the California College of the Arts, McDougall co-edited "Science is Fiction: The Films of Jean Painlevé" and organized the first retrospective of the French directorâs pioneering underwater films in the United States.
The program will include a viewing of rare editions of Ernst Haeckelâs writings and illustrations from the librariesâ special collections and an introduction by a USC marine biologist. A reception with refreshments will immediately follow the event. RSVP by calling (213) 740-1744
Faculty members are encouraged to invite their students to this unique multidisciplinary event.
Host: USC Libraries
More Info: http://dotsx.usc.edu/newsblog/index.php/main/comments/art_and_science_come_together_in_the_library_for_the_marine_sublime_onLocation: Edward L. Doheny Jr. Memorial Library (DML) - Doheny Lecture Hall
Audiences: Everyon invited but RSVP to (213) 740-1744
Contact: Patty Johnson
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
CSI Feedback Allocation in Multicell MIMO Channels
Fri, Nov 04, 2011 @ 10:00 AM - 11:00 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Paul de Kerret, Eurecom Institute
Talk Title: CSI Feedback Allocation in Multicell MIMO Channels
Abstract: In this talk, we will discuss the joint precoding across K transmitters (TXs), sharing the knowledge of the user's data symbols to be transmitted towards K single-antenna receivers (RXs). We consider a distributed channel state information (DCSI) configuration where each TX has its own local estimate of the overall multiuser MIMO channel. The focus of this work is on the optimization of the allocation of the CSI feedback subject to a constraint on the total sharing through the backhaul network. Building upon the Wyner model, we derive a new approach to allocate the CSI feedback while making efficient use of the pathloss structure to reduce the amount of feedback necessary. We show that the proposed CSI allocation achieves good performance with only a linear scaling in the number of cooperating TXs instead of a quadratic scaling when the CSI is shared to all the TXs, thus making the joint transmission from a large number of TXs more practical than previously thought.
Biography: Paul de Kerret was born in 1987 in Paris, France. In 2009, he graduated from the Ecole Nationale Supérieure des Télécommunications de Bretagne, France. Via a double degree program, he continued his studies in Munich and obtained a diploma degree in electrical engineering from Munich University of Technology (TUM), Germany. Furthermore, he also earned a four year degree in mathematics at the Université de Bretagne Occidentale, France in 2008. From January 2010 to September 2010, he has been a research assistant at the Institute for Theoretical Information Technology, RWTH Aachen University, Germany. Since October 2010, he is pursuing a doctorate at Eurecom Institute under the supervision of David Gesbert. The thesis is focused on the cooperation of transmitters in interference limited wireless networks. Some of his research interest are MIMO networks, multiuser information theory, and distributed optimization.
Host: Prof. Urbashi Mitra, ubli@usc.edu, x04667
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 539
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Systems Seminar Series
Fri, Nov 04, 2011 @ 03:00 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. David Su, Qualcomm Atheros
Talk Title: Challenges in designing CMOS Systems-on-a-Chip for Wireless Communications
Host: Hossein Hashemi
More Information: Seminar_Speaker_Sue_2011_11_4.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hossein Hashemi
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Electrophysics Seminar
Fri, Nov 11, 2011 @ 11:00 AM - 12:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Mercedeh Khajavikhan, University of California, San Diego
Talk Title: Thresholdless Nanoscale Coaxial Lasers
Abstract: Metal coated nanolasers have been a subject of growing interest, owing to both the altered laser physics at small volumes and the promise in future photonic circuit technology. The metal at optical frequencies provides strong confinement of the optical field, but at the same time present a challenge by introducing high dissipation losses, which potentially results in prohibitively high threshold for lasing.
In this talk, I present our recent experimental findings about lasing in nanoscale sub-wavelength metallic coaxial cavities, which include room-temperature continuous wave laser action in the smallest cavities to date at telecom wavelengths. Furthermore, by utilizing the unique properties of the coaxial cavities, which may have a single non-degenerate mode, we demonstrate thresholdless lasing at cryogenic temperatures, thus providing a scalable solution to overcoming the metal losses.
Biography: Mercedeh Khajavikhan received B.S. and M.S. in Electronics from Amirkabir University of Technology, Tehran, Iran, in 2000 and 2003, respectively, and Ph.D. in Electrical Engineering from University of Minnesota in 2009. Her Ph.D. dissertation was on coherent laser beam combining for high power laser applications. In 2009, she joined University of California, San Diego as a post-doctorate researcher. Her research interests have also shifted to nanooptics, plasmonics, and silicon photonics.
Host: Ming Hsieh Institute
More Info: http://ee.usc.edu/news/seminars/eepLocation: Charles Lee Powell Hall (PHE) - 333
Audiences: Everyone Is Invited
Contact: Marilyn Poplawski
Event Link: http://ee.usc.edu/news/seminars/eep
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Systems Seminar Series
Fri, Nov 11, 2011 @ 03:00 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. David Wentzloff, University of Michigan
Talk Title: Synthesizing RFICs from Digital Standard Cell Libraries
Host: Hossein Hashemi
More Information: Seminar_Speaker_Wentzloff_2011_11_11.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hossein Hashemi
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Systems Seminar Series
Mon, Nov 14, 2011 @ 02:30 PM - 04:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Dr. Thomas Kazior, Raytheon Integrated Defense Systems
Talk Title: Advanced Microelectronics Technology: Heterogeneous Integration of III-V Devices and Si CMOS on a Silicon Substrate
Host: Hossein Hashemi
More Information: Seminar_Speaker_Kazior_2011_11_14.pdf
Location: Hedco Neurosciences Building (HNB) - 100
Audiences: Everyone Is Invited
Contact: Hossein Hashemi
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Communications, Networks and Systems (CommNetS) Seminar: On source-channel separation over networks
Wed, Nov 16, 2011 @ 02:00 PM - 03:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Suhas Diggavi, UCLA
Talk Title: On source-channel separation over networks
Series: Communications, Networks & Systems (CommNetS) Seminar
Abstract: One of the important architectural insights from information theory is the Shannon source-channel separation theorem. For point-to-point channels, the separation theorem shows that one can compress a source separately and have a digital interface with the noisy channel coding; and that such an architecture is (asymptotically in block size) optimal. Therefore the importance of this is that one can 'layer' the architecture by separating the data compression into bits and the 'physical layer' of coding for noise. The optimality of this attractive architecture is known to break down in networks, for example for broadcast channels or multiple access channels. Nonetheless, this architecture is the basis for network layering in many of the current network architectures.
A natural question is to study the 'cost' of separation, that is, how much do we lose through separation, and cases where we can demonstrate that separation is indeed optimal. We show that the separation approach is optimal in two general network scenarios, and is approximately optimal in a third general scenario. We will also connect the approximate optimality of separation to work on multiple description data compression. We will also mention special situations where one can demonstrate explicit optimal (hybrid) source-channel coding strategies.
Parts of this work are joint with Chao Tian, Shlomo Shamai and Jun Chen.
Biography: Suhas N. Diggavi received a B. Tech. degree in electrical engineering from the Indian Institute of Technology, Delhi, India, and the Ph.D. degree in electrical engineering from Stanford University, Stanford, CA. After completing his Ph.D., he was a Principal Member Technical Staff in the Information Sciences Center, AT&T Shannon Laboratories, Florham Park, NJ. After that he was on the faculty of the School of Computer and Communication Sciences, EPFL, where he directed the Laboratory for Information and Communication Systems (LICOS). He joined UCLA as Professor of Electrical Engineering in 2010.
He is a recipient of the 2006 IEEE Donald Fink prize paper award, 2005 IEEE Vehicular Technology Conference best paper award and the Okawa foundation research award. He was an associate editor for Communication Letters and was a guest editor for a special issue in the IEEE Journal on Special Topics in Signal Processing. He is currently an associate editor for the ACM/IEEE Transactions on Networking and the IEEE Transactions on Information Theory (Shannon theory). He has 8 issued patents.
Host: Prof. Rahul Jain
More Info: http://csi.usc.edu/~dimakis/CommNetS/doku.php?id=startLocation: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Rahul Jain
Event Link: http://csi.usc.edu/~dimakis/CommNetS/doku.php?id=start
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
An Information-Theoretic Characterization for Sparse Signal Processing and Applications
Thu, Nov 17, 2011 @ 11:00 AM - 12:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: George Atia, U. of Illinois at Urbana-Champaign
Talk Title: An Information-Theoretic Characterization for Sparse Signal Processing and Applications
Abstract: We present an information-theoretic characterization for problems in sparse signal processing. First, we consider the group testing problem where the goal is to recover a small distinguished subset of items from a large population while efficiently reducing the total number of tests. Establishing its connection to Shannon-coding theory, we formulate the group testing problem as a channel coding/decoding problem and derive a unifying result that characterizes the sample complexity through computation of a mutual information expression. We show that this result is fairly general and applicable to many interesting scenarios in sparse signal processing, including Bayesian compressive sensing and relevant features' identification. We derive precise sample complexity bounds for these cases.
Biography: George Atia joined the Department of Electrical and Computer Engineering at the University of Illinois at Urbana-Champaign in Fall 2009, where he is currently a postdoctoral research associate with the Coordinated Science Laboratory. He received his Ph.D. degree in Electrical and Computer Engineering from Boston University, Massachusetts, in 2009. He received the B.Sc. and M.Sc. degrees, both in Electrical Engineering, from Alexandria University, Egypt, in 2000 and 2003, respectively. He is the recipient of many awards including the outstanding graduate teaching fellow of the year award in 2003-2004, the 2006 College of Engineering Deans Award at the Science and Engineering Research Symposium, and the best paper award at the International Conference on Distributed Computing in Sensor Systems (DCOSS) in 2008. His main research interests are in wireless communications, statistical signal processing and information theory. His current research focus is on controlled sensing for inference and sparse signal processing.
Host: Prof. Urbashi Mitra, ubli@usc.edu, x04667
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Gerrielyn Ramos
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Integrated Systems Seminar Series
Fri, Nov 18, 2011 @ 03:00 PM - 04:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Michael Flynn, University of Michigan
Talk Title: Techniques for Efficient Data Conversion and Flexible Wireless Transceivers in Nanometer CMOS
Host: Hossein Hashemi
More Information: Seminar_Speaker_Flynn_2011_11_18.pdf
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Hossein Hashemi
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Model-Based Control and Optimization Challenges in Reservoir Engineering
Mon, Nov 21, 2011 @ 01:30 PM - 02:30 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Prof. Paul M.J. Van den Hof, Delft University of Technology & Eindhoven University of Technology
Talk Title: Model-Based Control and Optimization Challenges in Reservoir Engineering
Abstract: Due to urgent needs to increase efficiency in oil recovery from subsurface reservoirs new technology is developed that allows more detailed sensing and actuation of multiphase flow properties in oil reservoirs. One of the examples is the controlled injection of water through injection wells with the purpose to displace the oil in an appropriate direction. This technology enables the application of model-based optimization and control techniques to optimize production over the entire production period of a reservoir, which can be around 25 years. Large scale reservoir flow models are used for optimizing production settings, but suffer from high levels of uncertainty and limited validation options. One of the challenges is the development of reduced complexity models that deliver accurate long-term predictions, and at the same time are not more complex than can be warranted by the amount of data that is available. In this seminar an overview will be given of the problems and opportunities for model-based control and optimization in this field aiming at the development of a closed-loop reservoir management system.
Biography: Paul Van den Hof received the Ph.D. degree from Eindhoven University of Technology, The Netherlands in 1989. Since 1986 he is with Delft University of Technology, where he was appointed as full professor in 1999. Since 2003 he has been founding co-director of the Delft Center for Systems and Control (DCSC), with appointments in the faculty of Mechanical, Maritime and Materials Engingeering, and the faculty of Aplied Sciences. As of 2011 he holds a full professor position in the Electrical Engineering department of Eindhoven University of Technology. Since 2005 he is also scientific director of the national research and graduate school "Dutch Institute of Systems and Control" (DISC). His research interests are in issues of system identification, identification for control, and model-based control and optimization, with applications in industrial process control systems, including petroleum reservoir engineering systems, mechanical servo systems and physical measurement systems. He has been a member of the IFAC Council (1999-2005), the editorial board of Automatica (1992-2005), and the Board of Governors of IEEE Control Systems Society (2003-2005). He is IFAC Fellow and Fellow of IEEE.
Host: Prof. Antonio Ortega
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
From Magic Mirror to Autism: Using Computational Multimedia for Video Self-modeling Therapy
Tue, Nov 22, 2011 @ 10:00 AM - 11:30 AM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Sen-ching Samson Cheung, MIA Laboratory, University of Kentucky
Talk Title: From Magic Mirror to Autism: Using Computational Multimedia for Video Self-modeling Therapy
Abstract: If you have ever been on a diet, you would know that having an old picture of a thinner "you" on the bathroom mirror or the refrigerator can be a powerful motivating tool. This is the idea behind the psychological theory of self-efficacy -- you can learn or model to perform certain tasks because you see yourself doing it. Even more powerful is to use modified imagery to trick your brain into believing a positive personal experience that has not occurred before. Perhaps the most famous example is the mirror box therapy for amputees -- seeing the mirror reflection of an intact arm conjures up an illusion of the presence of the amputated limb and provides an effective means to alleviate the phantom limb pain. Another example is video self-modeling (VSM) therapy in which the patient acts as his/her own model by taping several hours of behavior in video and splicing together a chain of clips depicting the new skill for instruction. Mirror and VSM therapies are widely used in the treatments of many neurological disorders. In practice, these therapies are challenging to administer due to the difficulties in constructing the mirror device or preparing the appropriate video content. This is where multimedia engineers can help -- by creating fictitious multimedia contents that require little manual input and are perceptually indistinguishable from those captured by sensors. In this talk, I will discuss a number of on-going projects in my lab that use computational multimedia approaches for therapy. I will demonstrate our SpeakToMe system for creating VSM content for voice-disorder patients. The system replaces the coarse voice of a patient with a perceptually-similar but healthy voice, and then renders a new video sequence with automated lip-synchronization. I will also discuss the MagicMirror system for helping children with autism spectrum disorders in their behavioral therapy. The MagicMirror system is a large-size computer display that uses a network of depth and color cameras to render a view-dependent mirror image of a virtual mirror. By injecting new behaviors into the mirror images, we are hoping to provide the instant visual feedback that is crucial to learning but completely lacking in the current form of VSM.
Biography: Sen-ching (Samson) Cheung is an associate professor from the Department of Electrical and Computer Engineering of the University of Kentucky (UKY). He also has a joint appointment with the UKY Center of Visualization and Virtual Environments. Before joining UKY in 2004, he was a computer scientist in the Scientific Data Mining group at Lawrence Livermore National Laboratory. Samson got his Ph.D. from University of California, Berkeley in 2002. His work spans a number of different areas in multimedia including video copy detection, data mining, video surveillance, privacy protection, encrypted-domain signal processing, and computational multimedia for therapy. He is an associated editor of IEEE Transactions of Multimedia, Signal Processing: Image Communications, Statistical Analysis and Data Mining, and EURASIP Journal on Information Security. He is a senior member of IEEE.
Host: Professor Shrikanth Narayanan
Location: Ronald Tutor Hall of Engineering (RTH) - 211
Audiences: Everyone Is Invited
Contact: Mary Francis
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor. -
Blind Multimedia Processing
Tue, Nov 22, 2011 @ 01:00 PM - 02:00 PM
Ming Hsieh Department of Electrical and Computer Engineering
Conferences, Lectures, & Seminars
Speaker: Sen-ching Samson Cheung,Ph.D. , MIA Laboratory, University of Kentucky
Talk Title: Blind Multimedia Processing
Abstract: The right to privacy has long been regarded as one of the basic universal human rights. The combination of ubiquitous sensors, wireless connectivity, and powerful recognition algorithms makes it easier than ever to monitor every aspect of our daily lives. From the use of sophisticated video surveillance systems to the theft of biometric signals, people are increasingly wary about the privacy of their multimedia data. To mitigate public concern over privacy violation, it is imperative to make privacy protection a priority in developing the next-generation multimedia processing algorithms. Due to the high dimensionality, high data-rates and stringent real-time requirements of multimedia systems, developing provably-secure privacy protection schemes for multimedia often leads to a blowup in complexity and remains impractical for most applications. In this talk, I will discuss a number of active projects in my group that aim at alleviating such an efficiency barrier. I will present the anonymous biometric access control system that can validate a biometric signal without knowing the identity of the owner. Anonymity is guaranteed by performing the matching on biometric signals that are encrypted with a homomorphic public-key cryptosystem. To reduce complexity of the encrypted-domain processing, we propose a k-anonymous quantization scheme that can optimally tradeoff efficiency with privacy. To realize the holy grail of privacy-protected signal processing at the pixel level, I will also discuss our recent work on secure cloud-based image processing with secret shares. The focus of this work is on the use of information-theoretic, rather than computationally, secure protocols for image processing. Image data and parameters are decomposed into secret shares and distributed in the cloud for processing. Giving a non-colluding distributed computing environment, such an approach is significantly faster and requires less bandwidth than other computationally-secure multiparty computation. I will use the example of a wavelet image denoising to illustrate our core framework of image processing with secret shares.
Biography: Sen-ching (Samson) Cheung is an associate professor from the Department of Electrical and Computer Engineering of the University of Kentucky (UKY). He also has a joint appointment with the UKY Center of Visualization and Virtual Environments. Before joining UKY in 2004, he was a computer scientist in the Scientific Data Mining group at Lawrence Livermore National Laboratory. Samson got his Ph.D. from University of California, Berkeley in 2002. His work spans a number of different areas in multimedia including video copy detection, data mining, video surveillance, privacy protection, encrypted-domain signal processing, and computational multimedia for therapy. He is an associated editor of IEEE Transactions of Multimedia, Signal Processing: Image Communications, Statistical Analysis and Data Mining, and EURASIP Journal on Information Security. He is a senior member of IEEE.
Host: Prof. C.-C. Jay Kuo
Location: Hughes Aircraft Electrical Engineering Center (EEB) - 248
Audiences: Everyone Is Invited
Contact: Talyia Veal
This event is open to all eligible individuals. USC Viterbi operates all of its activities consistent with the University's Notice of Non-Discrimination. Eligibility is not determined based on race, sex, ethnicity, sexual orientation, or any other prohibited factor.
