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Events for November 22, 2011
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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
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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
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USC in Your Neighborhood: Behind the Scenes of Avatar
Tue, Nov 22, 2011 @ 06:00 PM - 08:00 PM
Viterbi School of Engineering Alumni
Receptions & Special Events
USC in Your Neighborhood: Behind the Scenes of Avatar
Featuring Dean Yannis C. Yortsos and Professor Paul Debevec
Tuesday, November 22, 2011
6:00 â 8:00 p.m.
Location: The TimesCenter
242 West 41st Street
New York, NY 10036
For more information visit, http://alumni.usc.edu/neighborhoodny
Location: 242 West 41st Street New York, NY 10036
Audiences: Everyone Is Invited
Contact: Kathleen Concialdi
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USC in Your Neighborhood - New York
Tue, Nov 22, 2011 @ 06:00 PM - 09:00 PM
USC Viterbi School of Engineering, Viterbi School of Engineering Alumni
Receptions & Special Events
Get the inside story from Dean Yortsos on the state of the university and the latest advancements at the USC Viterbi School of Engineering.
Then delve into the world of digitally realistic animation with Paul Debevec, associate director for graphics research at the USC Institute for Creative Technologies, whose techniques have been used in films such as Avatar and The Curious Case of Benjamin Button.
For more information, visit http://alumni.usc.edu/neighborhoodnyLocation: The TimesCenter, 242 West 41st Street, New York, NY 10036
Audiences: Everyone Is Invited
Contact: Katie Dunham
