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Efficient Video Clip Retrieval Using Index Structure

Efficient Video Clip Retrieval Using Index Structure

引用

IEEE Workshop on Multimedia Signal processing

作者： Jing Zhang Linjun Yang Hong Lu Xiangyang Xue Yap-peng Tan Shanghai Key Laboratory of Intelligent Information Processing Department of Computer Science & Engineering Fudan University Shanghai China School of Electrical & Electronic Engineering Nanyang Technological University Singapore

Retrieving similar video clips from large video database requires high query efficiency, precision and recall, which remains a challenging problem since the traditional query algorithms are inefficient and time-consuming. In this paper, we adopt the high-dimensional index structure vector-approximation file (VA-file) to organize the video database, and propose a new similarity measure which takes the temporal order among the video representations into account to improve the accuracy of query. Based on the VA-file and similarity measure, a new video clip retrieval algorithm is proposed in our method to achieve high query efficiency by using restricted sliding window to construct candidate video clips. Experimental results show that the proposed video retrieval method is efficient and effective

关键词： Information retrieval Algorithm design and analysis Indexes Computational complexity Histograms Information analysis Deductive databases Information processing computer science Data engineering

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3D ROC analysis for detection software used in water monitoring

3D ROC analysis for detection software used in water monitor...

引用

Chemical and Biological Standoff Detection III

作者： Liu, Wei-Min Wang, Su Chang, Chein-I. Jensen, Janet L. Jensen, James O. Knapp, Harlan Daniel, Robert Yin, Ray Remote Sensing Signal and Image Processing Laboratory Department of Computer Science and Electrical Engineering University of Maryland Baltimore County Baltimore MD 21250 US Army Edgewood Chemical and Biological Center Aberdeen Proving Ground MD 21010 ANP Technologies Inc. 824 Interchange Boulevard Newark DE 19711

Under the U.S. Army sponsored Joint Service Agent Water Monitor (JSAWM) program, developing hand-held assays using tickets for chemical/biological agent detection has been of major interest. One of keys to success is to develop detection algorithms that not only can effectively detect the presence of various agents, but also can quantify the detected agents. This paper presents a recent development of detection software that can perform 3-dimensional (3D) receiver operating characteristics (ROC) analysis which is based on quantified agent concentration. The ROC curves have been widely used in communications, signal processing and medical communities to evaluate the effectiveness of a detection technique. It generally formulates a signal detection problem as a binary composite hypothesis testing problem with the null hypothesis and the alternative hypothesis represents the case of no signal and the case of signal presence respectively. The ROC curve is then plotted based on the detection probability (power) PD versus the false alarm probability, P F. Unfortunately, such a two-dimensional (2D) (PD,P F)-based ROC curve does not factor in the concentration detected in an agent signal which is a crucial parameter in chemical/biological agent detection. The proposed 3D ROC analysis is developed from such a need. It includes an additional parameter, referred to as threshold t, which is used to threshold the detected agent signal concentration. Consequently, a different value of t results in a different 2D ROC curve. In order to take into account the thresholding factor t, a 3D ROC curve is derived and plotted based on three parameters, (PD,PF,t). As a result of the 3D ROC curve, three 2D ROC curves can be also derived. One is the conventional 2D (P D,PF)-ROC curve. Another is a 2D (PD,t)-ROC curve which describes the relationship between PD and the threshold value t. A third one is a 2D (PF,t)-ROC curve which shows the effect of the threshold value t on PF. The utility of

关键词： computer software

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An embedded system developed for hand held assay used in water monitoring

An embedded system developed for hand held assay used in wat...

引用

Chemical and Biological Standoff Detection III

作者： Wu, Lin Wang, Jianwei Ramakrishna, Bharath Hsueh, Mingkai Liu, Jonathan Wu, Qufei Wu, Chao-Cheng Cao, Mang Chang, Chein-I. Jensen, Janet L. Jensen, James O. Knapp, Harlan Daniel, Robert Yin, Ray Remote Sensing Signal and Image Processing Laboratory Department of Computer Science and Electrical Engineering University of Maryland Baltimore County Baltimore MD 21250 US Army Edgewood Chemical and Biological Center Aberdeen Proving Ground MD 21010 ANP Technologies Inc. 824 Interchange Boulevard Newark DE 19711

The US Army Joint Service Agent Water Monitor (JSAWM) program is currently interested in an approach that can implement a hardware-designed device in ticket-based hand-held assay (currently being developed) used for chemical/biological agent detection. This paper presents a preliminary investigation of the proof of concept. Three components are envisioned to accomplish the task. One is the ticket development which has been undertaken by the ANP, Inc. Another component is the software development which has been carried out by the Remote Sensing Signal and Image processing laboratory (RSSIPL) at the University of Maryland, Baltimore County (UMBC). A third component is an embedded system development which can be used to drive the UMBC-developed software to analyze the ANP-developed HHA tickets on a small pocket-size device like a PDA. The main focus of this paper is to investigate the third component that is viable and is yet to be explored. In order to facilitate to prove the concept, a flatbed scanner is used to replace a ticket reader to serve as an input device. The Stargate processor board is used as the embedded System with Embedded Linux installed. It is connected to an input device such as scanner as well as output devices such as LCD display or laptop etc. It executes the C-Coded processing program developed for this embedded system and outputs its findings on a display device. The embedded system to be developed and investigated in this paper is the core of a future hardware device. Several issues arising in such an embedded system will be addressed. Finally, the proof-of-concept pilot embedded system will be demonstrated.

关键词： Embedded systems

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A robust multi-view freehand three-dimensional ultrasound imaging system using volumetric registration

A robust multi-view freehand three-dimensional ultrasound im...

引用

IEEE International Conference on Systems, Man and Cybernetics

作者： Honggang Yu M.S. Pattichis M.B. Goens Department of Electrical and Computer Engineering Image and Video Processing and Communications Laboratory USA Childrens Hospital Heart Center University of New Mexico Albuquerque NM USA

In this paper, we describe a freehand, three-dimensional ultrasound imaging system. The system uses an electromagnetic position and orientation measurement device to capture two-dimensional ultrasound images at arbitrary planar orientations in space. For robust performance, we use a novel electromagnetic interference detection algorithm that can be used to estimate the probability density function of position and orientation measurement errors. Another important contribution of the proposed system is its ability to reconstruct from multiple standard views. The multi-view reconstruction procedure results in significant reduction in reconstruction error. The system uses object-based 3D volume registration, allowing for arbitrary rigid object movements in inter-view acquisition. The proposed system has been validated on simulated data and a physical, 3D ultrasound calibration phantom. Quantitative experimental results demonstrate the effectiveness of the 3D registration system, and a significant reduction in the mean-squared error via the use of the proposed multi-view reconstruction method.

关键词： Ultrasonic imaging Robustness Image reconstruction Position measurement Electromagnetic devices Extraterrestrial measurements Electromagnetic interference Detection algorithms Probability density function Calibration

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Ontology-Based Access to Multimedia Cultural Heritage Collections - The REACH Project

Ontology-Based Access to Multimedia Cultural Heritage Collec...

引用

Eurocon

作者： C. Doulaverakis Y. Kompatsiaris M.G. Strintzis Centre for Research and Technology Informatics and Telematics Institute Thessaloniki Greece Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

In this paper, an approach for providing unified access to heterogeneous distributed cultural heritage collections is presented. The proposed approach is developed within the framework of the REACH Greek National Project with the overall aim to provide a Web portal enabling access to different databases of cultural content with emphasis on multimedia material. In order to achieve this, the project employs ontology-based representation of cultural content, multimedia content-based search algorithms, hybrid ontology and content-based access and user-friendly search interfaces. This fusion approach provides users with resources for building queries of multimedia repositories sequentially using multiple individual search tools, and performs higher quality searching. In the current stage of development, real content such as inscriptions and coins from the Greco-Roman time period, has successfully been incorporated in the system

关键词： Ontologies Cultural differences Portals Multimedia databases Information retrieval Content based retrieval Material storage Multimedia systems Informatics Telematics

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Approximation of a linear shift-variant system by a set of linear shift-invariant systems

Approximation of a linear shift-variant system by a set of l...

引用

International Symposium on Signals, Circuits and Systems (ISSCS)

作者： V. Buzuloiu M. Malciu S.K. Mitra Image Processing and Analysis Laboratory University “Politehnica” of Bucharest Bucharest Romania CERN Geneva Department of Electrical and Computer Engineering University of California at Santa Barbara USA

This paper describes a method to approximate the impulse response of a linear shift-variant system by the impulse responses of a set of linear shift-invariant systems which process in parallel on various windowed versions of the input signal. The method is outlined for one-dimensional systems but the extension to multidimensional case is straightforward.

关键词： Linear approximation Large scale integration Image processing Image analysis Laboratories Multidimensional systems Linearity Image restoration Signal restoration Transfer functions

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A genetic algorithm-based approach to knowledge-assisted video analysis

A genetic algorithm-based approach to knowledge-assisted vid...

引用

IEEE International Conference on Image processing

作者： N. Voisine S. Dasiopoulou F. Precioso V. Mezaris I. Kompatsiaris M.G. Strintzis Informatics and Telematics Institute Centre for Research and Technology Hellas Thessaloniki Greece Information Processing Laboratory Electrical and Computer Engineering Department Aristotle University of Thessaloniki Thessaloniki Greece

Efficient video content management and exploitation requires extraction of the underlying semantics, a non-trivial task associating low-level features of the image domain and high-level semantic descriptions. In this paper, a knowledge-assisted approach for extracting semantics of domain-specific video content is presented. Domain knowledge considers both low-level features (color, motion, shape) and spatial behavior (topological and directional information). During the preprocessing step, a set of over-segmented homogenous atom-regions is generated and their low-level and spatial descriptions are extracted. A genetic algorithm is then applied in order to find the optimal interpretation according to a specific domain conceptualization. The proposed approach was tested on the formula one, tennis and beach vacations domains showing promising results.

关键词： Algorithm design and analysis Data mining Ontologies Genetic algorithms Object detection Content management Feature extraction Knowledge representation Semantic Web Laboratories

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Waveform-space-time adaptive processing for distributed aperture radars

Waveform-space-time adaptive processing for distributed aper...

引用

IEEE International Conference on Radar

作者： R.S. Adve R.A. Schneible G. Genello P. Antonik Department of Electrical and Computer Engineering University of Toronto Canada Marcy NY USA Sensors Directorate Signal Processing Branch US Air Force Research Laboratory USA

This paper presents the preliminary development of adaptive signal processing for distributed, waveform diverse, antenna arrays. The long term goal is to develop practical waveform-time-space adaptive processing algorithms for distributed apertures. A crucial issue identified in previous works is that, in practice, the target and interfering sources are not in the far-field of the antenna array. Recent work by the authors develops the model required to generate simulated data. This paper extends this work, focusing on using the model to formulate adaptive signal processing algorithms specifically for waveform diverse distributed apertures.

关键词： Apertures Interference Adaptive signal processing Signal processing algorithms Brain modeling Sensor arrays Antenna arrays Radar signal processing Adaptive arrays Gratings

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Using a Free-Parts Representation for Visual Speech Recognition

Using a Free-Parts Representation for Visual Speech Recognit...

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Proceedings of the Digital Image Computing: Technqiues and Applications (DICTA)

作者： P. Lucey S. Lucey S. Sridharan Queensland University of Technology Speech Audio Image and Video Research Laboratory Brisbane Australia Advanced Multimedia Processing Laboratory Department of Electrical and Computer Engineering Carnegie Mellon University Pittsburgh PA USA

Motivated by the success of free-parts based representations in face recognition, we have attempted to address some of the problems associated with applying such a philosophy to the task of speaker-independent visual speech recognition. A major problem with canonical area-based approaches in automatic visual speech recognition is the dependence these approaches have on locating and tracking the speaker’s region of interest (ROI) correctly. By employing a free-parts representation,we assume that the position/structure of patches within the mouth image can be relaxed so they can "freely" move to varying extents, hence reducing the influence of the front-end effect. In this paper, we show that by using a free-parts representation we gain some robustness against the problem of ROI localisation and tracking compared to current area-based feature extraction techniques such as the discrete cosine transform (DCT). Also in this paper, we expose the importance of representation for the task of visual speech recognition highlighted by the poor results current representations yield.

关键词： Speech recognition Mouth Hidden Markov models Laboratories Face recognition Feature extraction Discrete cosine transforms Robustness Automatic speech recognition Pixel

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About room response equalization and dereverberation

About room response equalization and dereverberation

引用

IEEE Workshop on Applications of Signal processing to Audio and Acoustics

作者： M. Karjalainen T. Paatero J.N. Mourjopoulos P.D. Hatziantoniou Laboratory of Acoustics and Audio Signal Processing Helsinki University of Technology Finland Audio Group Wire Communications Lab Electrical and Computer Engineering Department University of Patras Patras Greece

Improvement of sound reproduction in rooms by signal processing techniques has been studied seriously for more than twenty years. Such methods are called for example dereverberation, room (response) equalization, and room (response) correction. Understanding the limitations and quality criteria for such methods is gradually achieved through studies of this highly multidimensional problem. In the present paper we discuss the terminology and goals, compare some recent approaches of these techniques in practical cases, and finally point out future challenges

关键词： Acoustic signal processing Multidimensional signal processing Multidimensional systems Terminology

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