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2012 IEEE Consumer Communications and Networking Conference, CCNC'2012

作者： Li, Bian Holtzman, Henry Huynh, Tuan Montpetit, Marie-Jose Media Laboratory Massachusetts Institute of Technology Cambridge MA United States Electrical Engineering and Computer Science Department Research Laboratory of Electronics Massachusetts Institute of Technology Cambridge MA United States

ISBN: (纸本)9781457720710

MatchMaker is an automated collaborative filtering system that recommends friends to people on Facebook by analyzing and matching people's online profile with the profiles of TV characters. The goal of MatchMaker is to produce friend recommendations with rich contextual information through collaborative filtering in the existing social network. Using relationships in TV programs as a parallel comparison matrix, MatchMaker projects these relationships into reality to help people find friends whose personality and characteristics have been voted to suit them well by their social network. MatchMaker also encourages more TV content viewing by using the social network context and connections to provoke people's curiosity of TV characters whom they have been matched with in their social network. © 2012 IEEE.

关键词： Collaborative filtering

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Enhanced HDR image rendering method using visual acuity based edge separation

Enhanced HDR image rendering method using visual acuity base...

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2012 International Conference on Image Processing, computer Vision, and Pattern Recognition, IPCV 2012

作者： Lee, Geun-Young Lee, Sung-Hak Kwon, Hyuk-Ju Han, Chan-Ho Sohng, Kyu-Ik School of Electrical Engineering and Computer Science Kyungpook National University Korea Republic of Dept. of Broadcasting Visual Media and Technology Kangwon National University Korea Republic of

ISBN: (纸本)9781601322258

iCAM06 is a high dynamic range (HDR) imaging technology. However, the base-detail separation, chromatic adaptation, and tone compression algorithms included in ICAM06 cause problems in image quality. This study focuses on the desaturation, poor contrast, and noise problems found in the dark regions. First, we discuss desaturation compensation using the visual acuity characteristics for various illuminant levels. The edge stop function of the bilateral filter in the iCAM06 method is adoptively modified according to the illuminant information. Second, in order to reduce the magnified noise in the dark regions due to tone compression, the shadow regions are detected by an object's intensity and illuminant level, and the noise of the detected regions is then reduced using a luminance-adaptive coring function. Finally, we confirmed that the color saturation and image contrast are enhanced and the noise reduced for dark objects through the use of the proposed methods.

关键词： Noise abatement

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Medical image segmentation using improved FCM

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Science China(Information Sciences) 2012年第5期55卷 1052-1061页

作者： ZHANG XiaoFeng 1,2,ZHANG CaiMing 1,3,4,TANG WenJing 1,2 & WEI ZhenWen 1 1 School of computer Science and technology,Shandong University,Jinan 250101,China 2 School of Information and electrical engineering,Ludong University,Yantai 264025,China 3 School of computer Science and technology,Shandong University of Finance and Economics,Jinan 250014,China 4 Shandong Province Key Lab of Digital media technology,Jinan 250014,China 1. School of Computer Science and Technology Shandong University Jinan 250101 China2. School of Information and Electrical Engineering Ludong University Yantai 264025 China3. School of Computer Science and Technology Shandong University of Finance and Economics Jinan 250014 China4. Shandong Province Key Lab of Digital Media Technology Jinan 250014 China

Image segmentation is one of the most important problems in medical image processing,and the existence of partial volume effect and other phenomena makes the problem much more *** C-means,as an effective tool to deal with PVE,however,is faced with great challenges in *** at this,this paper proposes one improved FCM algorithm based on the histogram of the given image,which will be denoted as HisFCM and divided into two *** first phase will retrieve several intervals on which to compute cluster centroids,and the second one will perform image segmentation based on improved FCM *** with FCM and other improved algorithms,HisFCM is of much higher efficiency with satisfying *** on medical images show that HisFCM can achieve good segmentation results in less than 0.1 second,and can satisfy real-time requirements of medical image processing.

关键词： FCM histogram image segmentation medical image processing

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Identification of fractional order systems using modulating functions method

Identification of fractional order systems using modulating ...

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American Control Conference

作者： Da-Yan Liu Taous-Meriem Laleg-Kirati Olivier Gibaru Wilfrid Perruquetti Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah university of science and technology KSA LSIS (CNRS UMR 7296) Arts et Métiers ParisTech 8 Boulevard Louis XIV 59046 Lille Cedex France LAGIS (CNRS UMR 8146) école Centrale de Lille BP 48 Cité Scientifique 59650 Villeneuve d'Ascq France

ISBN: (纸本)9781479901777

The modulating functions method has been used for the identification of linear and nonlinear systems. In this paper, we generalize this method to the on-line identification of fractional order systems based on the Riemann-Liouville fractional derivatives. First, a new fractional integration by parts formula involving the fractional derivative of a modulating function is given. Then, we apply this formula to a fractional order system, for which the fractional derivatives of the input and the output can be transferred into the ones of the modulating functions. By choosing a set of modulating functions, a linear system of algebraic equations is obtained. Hence, the unknown parameters of a fractional order system can be estimated by solving a linear system. Using this method, we do not need any initial values which are usually unknown and not equal to zero. Also we do not need to estimate the fractional derivatives of noisy output. Moreover, it is shown that the proposed estimators are robust against high frequency sinusoidal noises and the ones due to a class of stochastic processes. Finally, the efficiency and the stability of the proposed method is confirmed by some numerical simulations.

关键词： identification on-line proposed

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Fractional order differentiation by integration: an application to fractional linear systems

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IFAC Proceedings Volumes 2013年第1期46卷 653-658页

作者： D.Y. Liu T.M. Laleg-Kirati O. Gibaru Computer Electrical and Mathematical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) 23955-6900 Thuwal Kingdom of Saudi Arabia LSIS (CNRS UMR 7296) Arts et Métiers ParisTech 8 Boulevard Louis XIV 59046 Lille Cedex France équipe Projet Non-A INRIA Lille-Nord Europe Parc Scientifique de la Haute Borne 40 avenue Halley Bât.A Park Plaza 59650 Villeneuve d'Ascq France

In this article, we propose a robust method to compute the output of a fractional linear system defined through a linear fractional differential equation (FDE) with time-varying coefficients, where the input can be noisy. We firstly introduce an estimator of the fractional derivative of an unknown signal, which is defined by an integral formula obtained by calculating the fractional derivative of a truncated Jacobi polynomial series expansion. We then approximate the FDE by applying to each fractional derivative this formal algebraic integral estimator. Consequently, the fractional derivatives of the solution are applied on the used Jacobi polynomials and then we need to identify the unknown coefficients of the truncated series expansion of the solution. Modulating functions method is used to estimate these coefficients by solving a linear system issued from the approximated FDE and some initial conditions. A numerical result is given to confirm the reliability of the proposed method.

关键词： Differential equations Differentiators Parameter estimation

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Traveling through space-time: An interactive photo browsing system 12

Traveling through space-time: An interactive photo browsing ...

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SIGGRAPH Asia 2012 Posters, SA 2012

作者： Huang, Ke-Ting Sun, Shih-Wei Hu, Min-Chun Cheng, Wen-Huang Tsai, Tsung-Hung Department of New Media Art Taipei National University of the Arts Taiwan Center for Art and Technology Taipei National University of the Arts Taiwan Department of Computer Science and Information Engineering National Cheng Kung University Taiwan Research Center for Information Technology Innovation Academia Sinica Taiwan

ISBN: (纸本)9781450319119

Digital photos are estimated to be generated and uploaded to social image websites (e.g. Flickr) in the amount of 375 petabytes annually [Tueld et al.], and plenty of these photos are annotated with the creation time/date in EXIF information. Among these photos, a large number of images are geo-tagged (e.g. GPS and landmark names) to indicate where the photo was taken. Moreover, several public databases composed of pictures captured by live cameras at various locations are available on the internet . Therefore, it has become a crucial task to enable an intuitive and efficient way for users to browse large-scale photos in space and time. Conventional photo browsing applications, e.g. ACDSee and Picasa, display photos one by one according to alphabetical or temporal order. To enrich the user's browsing experience, numerous multimedia systems, such as Photo Story, Tiling Slideshow, Auto- Collage, and IS-Scrapbook, have been developed to organize photos based on various photo metadata, including time information, visual contents, and typographical design principles. Aiming at creating a browsing style with a realistic feel, Photo Navigator is proposed to reveal the spatial relations among photos and offer a strong sense of space by taking users to fly into the scenes [Hsieh et al.]. Instead of regarding the system users as passive content receivers, Google Street View and Photo Tourism [Snavely et al.] allow the users to interact with the systems and actively determine the browsing path based on the built spatial relations among photos by the techniques of image stitching and 3D reconstruction. However, the temporal relations of photos are not well taken into account. Copyright is held by the author / owner(s).

关键词： Multimedia systems

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RECURRENCE TEXTURES FOR HUMAN ACTIVITY RECOGNITION FROM COMPRESSIVE CAMERAS

RECURRENCE TEXTURES FOR HUMAN ACTIVITY RECOGNITION FROM COMP...

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IEEE International Conference on Image Processing

作者： Kuldeep Kulkarni Pavan Turaga Schools of Arts Media Engineering and Electrical Computer and Energy Engineering Arizona State University Tempe AZ USA

Recent advances in camera architectures and associated mathematical representations now enable compressive acquisition of images and videos at low data-rates. In such a setting, we consider the problem of human activity recognition, which is an important inference problem in many security and surveillance applications. We propose a framework for understanding human activities as a non-linear dynamical system, and propose a robust, generalizable feature that can be extracted directly from the compressed measurements without reconstructing the original video frames. The proposed feature is termed recurrence texture and is motivated from recurrence analysis of non-linear dynamical systems. We show that it is possible to obtain discriminative features directly from the compressed stream and show its utility in recognition of activities at very low data rates.

关键词： Activity Analysis Inference from Compressive Cameras

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Who's who in a sports video? An individual level sports video indexing system

Who's who in a sports video? An individual level sports vide...

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2012 13th IEEE International Conference on Multimedia and Expo, ICME 2012

作者： Sun, Shih-Wei Cheng, Wen-Huang Hung, Yao-Ling Fan, Ivy Liu, Chris Hung, Jacqueline Lin, Chia-Kai Liao, Hong-Yuan Mark Department of New Media Art Taipei National University of the Arts Taipei Taiwan Center for Art and Technology Taipei National University of the Arts Taipei Taiwan Research Center for Information Technology Innovation Academia Sinica Taipei Taiwan Institute of Information Science Academia Sinica Taipei Taiwan Department of Computer Science University of Illinois Urbana Champaign IL United States Electrical Engineering and Computer Science Massachusetts Institute of Technology MA United States Electronic Engineering National Taiwan University of Science and Technology Taipei Taiwan

ISBN: (纸本)9781467316590

Sports video analysis has attracted great attention in recent years. In the past decade, numerous sports video indexing approaches have been proposed at different semantic levels. In this paper, an individual level sports video indexing (ILSVI) scheme is proposed. The individual level refers to the indexing of a sports video on a player basis, i.e. to recognize each player in a multi-player game. Since the jersey number is always ''worn'' by a player as the player's identity in a game, it is feasible to recognize jersey numbers for individual level indexing in sports videos. To solve the jersey number recognition problem, a principal-axis based contour descriptor is proposed. Compared to the state-of-the-art approaches, the proposed descriptor can achieve higher recognition rate and only consume much less computation power. In addition, we developed an interactive system to realize the individual level sports video indexing (ILSVI). This interactive system includes a player detection and a jersey number detection sub-systems. The interactive system can help complete the individual level sports video indexing task. We shall use basketball game videos as the basis to develop real-world systems. © 2012 IEEE.

关键词： Semantics

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On Achieving All-Optical Failure Restoration via Monitoring Trails

On Achieving All-Optical Failure Restoration via Monitoring ...

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IEEE INFOCOM Conference

作者： Janos Tapolcai Pin-Han Ho Peter Babarczi Lajos Ronyai MTA-BME Future Internet Research Group High-Speed Networks Laboratory (HSNLab) Dept. of Telecommunications and Media Informatics Budapest University of Technology Dept. of Electrical and Computer Engineering University of Waterloo Canada Computer and Automation Research Institute Hungarian Academy of Sciences and BME

ISBN: (纸本)9781467359443

The paper investigates a novel monitoring trail (m-trail) scenario that can enable any shared protection scheme for achieving all-optical and ultra-fast failure restoration. Given a set of working (W-LPs) and protection (P-LPs) lightpaths, we firstly define the neighborhood of a node, which is a set of links whose failure states should be known to the node in restoration of the corresponding W-LPs. A set of m-trails is routed such that each node can localize any failure in its neighborhood according to the ON-OFF status of the traversing m-trails. Bound analysis is performed on the minimum bandwidth required for the m-trails. Extensive simulation is conducted to verify the proposed scheme.

关键词： Line of nodes restoration trails bandwidth requirement

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Anisotropic diffusion filter without conductivity parameters

Anisotropic diffusion filter without conductivity parameters

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2012 16th International Conference on System Theory, Control and Computing, ICSTCC 2012

作者： Demirci, Recep Guvenc, Ugur Tanyeri, Ufuk Computer Engineering Department Technology Faculty Gazi University Ankara 06500 Turkey Electrical-Electronics Engineering Department Technology Faculty Duzce University Duzce 81100 Turkey Industrial Technology Education Department Industrial Arts Education Faculty Gazi University Ankara 06370 Turkey

ISBN: (纸本)9786068348483

Two novel automatic anisotropic diffusion filters without conduction parameters were proposed in this paper. In the proposed first method, initially, the gradient of the noisy image to be filtered was calculated by Sobel operator and then the center of gravity of gradient image was used as diffusivity parameter, K and edge threshold. It was observed that the center of gravity of gradient image changed with noise. In the second approach, the complement of gradient image was directly employed as heat conductivity parameter in image filter. Consequently, the user dependency was avoided. The proposed image filter was tested with well-known test images. © 2012 Dunarea de Jos University.

关键词： Computation theory

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