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A fuzzy approach to texture segmentation

A fuzzy approach to texture segmentation

引用

international conference on information technology: coding and computing (itcc)

作者： M. Hanmandlu V.K. Madasu S. Vasikarla Department of Electrical Engineering Indian Institute of Technology Delhi New Delhi India School of ITEE University of Queensland QLD Australia IT Department American InterContinental University Los Angeles CA USA

The texture segmentation techniques are diversified by the existence of several approaches. In this paper, we propose fuzzy features for the segmentation of texture image. For this purpose, a membership function is constructed to represent the effect of the neighboring pixels on the current pixel in a window. Using these membership function values, we find a feature by weighted average method for the current pixel. This is repeated for all pixels in the window treating each time one pixel as the current pixel. Using these fuzzy based features, we derive three descriptors such as maximum, entropy, and energy for each window. To segment the texture image, the modified mountain clustering that is unsupervised and fuzzy c-means clustering have been used. The performance of the proposed features is compared with that of fractal features.

关键词： Image segmentation Fractals Pixel Feature extraction Entropy Fuzzy logic Statistics Gaussian processes Markov random fields Anisotropic magnetoresistance

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KIP: a keyphrase identification program with learning functions

KIP: a keyphrase identification program with learning functi...

引用

international conference on information technology: coding and computing (itcc)

作者： Y.B. Wu Q. Li R.S. Bot X. Chen Information Systems Department New Jersey Institute of Technology USA

We report a keyphrase identification program (KIP), which uses sample human keyphrases and then learns to identify additional new keyphrases. KIP first populates its database using manually identified keyphrases; each keyphrase is preprocessed and assigned an initial weight. It then extracts noun phrases from documents. All noun phrases will be assigned a score, depending on the weights for words it contains; the ones that have a score higher than the threshold will be selected as keyphrases. Learned new keyphrases will be inserted to the database and weights will be updated. As a result, new keyphrase identification iteration will be triggered. The process stops when no new keyphrases are identified during previous iteration. According to the results of evaluation, the base KIP system's average recall was 0.7 and precision was 0.44. The augmented KIP with learning functions did produce new keyphrases which were not identified by the base system.

关键词： Databases Text mining Humans Vocabulary Data mining Thesauri information systems Text analysis Natural language processing Indexing

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Distributed omni-video arrays and digital tele-viewer for customized viewing, event detection and notification

Distributed omni-video arrays and digital tele-viewer for cu...

引用

international conference on information technology: coding and computing (itcc)

作者： M.M. Trivedi K.S. Huang Tarak Gandhi B. Hall K. Harlow Computer Vision and Robotics Research (CVRR) Laboratory University of California San Diego USA

Recent innovations in real-time machine vision, distributed computing, software architectures, and encrypted high-speed networking are expanding the available technology for intelligent camera arrays on televiewing and interactive applications. In this paper we describe research aimed at the realization of a powerful televiewing system using arrays of omnidirectional cameras. The video arrays provide an interactive, real-time, multiresolution televiewing interface to multiple people including physical security and emergency response crews simultaneously. Security measures such as authentication and network encryption are implemented on multiple platforms. Fusion of high-resolution rectilinear image over the omnidirectional image is also carried out. Computer vision techniques based on motion analysis are used for detecting interesting events. The televiewing system is verified for the performance as well as physically tested on the Super Bowl 2003 event for crowd detection and traffic monitoring.

关键词： Event detection Cryptography Cameras Power system security Technological innovation Machine vision Distributed computing Software architecture High-speed networks Intelligent networks

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Auxiliar: a case-based system to assist online courses

Auxiliar: a case-based system to assist online courses

引用

international conference on information technology: coding and computing (itcc)

作者： D. Piva R.L. de Freitas M.S. Miskulin G.S. Nakamiti C.M. Tobar AEI-Itapetininga FEEC Unicamp Brazil PUC-Campinas Paulista State University (UNESP) Brazil FEEC Unicamp Brazil Paulista State University (UNESP) Brazil PUC-Campinas Brazil

This paper presents the REASONING, the third module of a computerized system (AUXILIAR), designed to help human-tutors redefine information for those students who have difficulties in grasping deployed educational topics. To this end, there is an intelligent mechanism that facilitates the assessment process and searches for similar cases produced by other students in past situations. This search enables the system to redefine the information content to be rendered to the student in order to eliminate deficiencies detected during a formative assessment without considerable intervention by the tutor. To reach these goals, concepts of artificial intelligence (case-based reasoning, more specifically) and man-machine interaction are exploited. Thereby, there are presented the format of a case, the structure of the case library, as well as the intelligent retrieval mechanism that was developed.

关键词： Artificial intelligence Education Educational technology Man machine systems Libraries Intelligent structures Internet Publishing Aggregates Feedback

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OGSA-WebDB: an OGSA-based system for bringing Web databases into the grid

OGSA-WebDB: an OGSA-based system for bringing Web databases ...

引用

international conference on information technology: coding and computing (itcc)

作者： S.M. Pahlevi I. Kojima National Institute of Advanced Industrial Science and Technology (AIST) Grid Technology Research Center Tsukuba Ibaraki Japan

An OGSA-based system, OGSA-WebDB, is proposed, which enables local database applications to query Web databases using a standard database query language (SQL). OGSA-WebDB consists of two main components: proxy databases and a mediator. Proxy databases represent the desired Web databases while the mediator acts as an interface between the proxy databases and the Web databases. The mediator accepts an SQL query from local applications and transforms the query into one or more Boolean conditions that are then sent to the target Web databases. The mediator processes the SQL query in parallel, taking into account the characteristics of the Web databases. Experimental results revealed that the query processing time is so small that it can be ignored for timing considerations. The system has been fully implemented on top of Globus Toolkit and OGSA-DAI software components.

关键词： Database languages Drugs Query processing Timing Software tools Grid computing Application software DNA Web search Data security

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Jigsaw-based secure data transfer over computer networks

Jigsaw-based secure data transfer over computer networks

引用

international conference on information technology: coding and computing (itcc)

作者： R.A. Vasudevan A. Abraham S. Sanyal D.P. Agrawal Department of Computer Science and Engineering Indian Institute of Technology Chennai India School of Technology and Computer Science Tata Institute of Fundamental Research Mumbai India Computer Science Department Oklahoma State University OK USA Department of ECECS University of Cincinnati OH USA

In this paper, we present a novel encryption-less algorithm to enhance security in transmission of data in networks. The algorithm uses an intuitively simple idea of a "jigsaw puzzle" to break the transformed data into multiple parts where these parts form the pieces of the puzzle. Then these parts are packaged into packets and sent to the receiver. A secure and efficient mechanism is provided to convey the information that is necessary for obtaining the original data at the receiver-end from its parts in the packets, that is, for solving the "jigsaw puzzle". The algorithm is designed to provide information-theoretic (that is, unconditional) security by the use of a one-time pad like scheme so that no intermediate or unintended node can obtain the entire data. An authentication code is also used to ensure authenticity of every packet.

关键词： Computer networks Cryptography Data security Computer science information security World Wide Web Computer security Packaging Algorithm design and analysis Authentication

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引用

international conference on information technology: coding and computing (itcc)

作者： S.-H.S. Huang C.H. Molina-Rodriguez J.U. Quevedo-Torrero M.F. Fonseca-Lozada Department of Computer Science University of Houston USA Department of Computer Science Universidad Autónoma de Guadalajara Mexico

Hyperlinks inside HTML pages contain a wealth of information about the relationships among Web pages. Given a set of Web pages, we can explore the hyperlink relationships among these pages. This paper first provides formal definitions of hyperlink relations. We then use the notations to define similarity between two Web pages and between two sets of Web pages. For each one of them, we provide several definitions of similarity using forward and backward links. The similarity measure gives us a number between 0 and 1. We also demonstrate how to use the similarity measure to study clustering within a set of pages and to determine the "diversity" of a set of Web pages.

关键词： Web pages Internet Search engines Computer science information retrieval World Wide Web HTML Keyword search Search methods Data mining

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Design of an efficient architecture for real-time image enhancement based on a luma-dependent nonlinear approach

Design of an efficient architecture for real-time image enha...

引用

international conference on information technology: coding and computing (itcc)

作者： Hau Ngo Li Tao V. Asari VLSI Systems Laboratory Department of Electrical and Computer Engineering Old Dominion University Norfolk VA USA

A luminance dependent nonlinear image enhancement algorithm is proposed in this paper. Luma-dependent nonlinear enhancement (LDNE) is a luminance based multi-scale center/surround retinex algorithm, which achieves simultaneous dynamic range compression, color consistency and lightness rendition. Compared to other image enhancement algorithms, LDNE provides better color fidelity, specifies fewer parameters, enhances less noise, prevents the unwanted luminance drop at the uniform luminance areas, keeps the 'bright' background unaffected, and enhances well the 'dark' objects in 'bright' background. To support real time applications, an FPGA based co-processor is designed to perform some of the most computationally intensive operation in LDNE algorithm. Estimation techniques are introduced in the hardware algorithmic designed to achieve faster, simpler and more efficient architecture which is capable of processing more than 21 frames per second.

关键词： Image enhancement Colored noise Algorithm design and analysis Dynamic range Image coding Background noise Field programmable gate arrays Coprocessors Hardware Computer architecture

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Internet archive as a source of bilingual dictionary

Internet archive as a source of bilingual dictionary

引用

international conference on information technology: coding and computing (itcc)

作者： M.A. Fattah F. Ren K. Shingo Faculty of Engineering Tokushima University Tokushima Japan

Parallel corpus is a very important tool to construct a good machine translation system or make any natural language processing research for cross language information retrieval. Internet archive is a good source of parallel documents in different languages. In order to construct a good parallel corpus from the Internet archive, bilingual dictionary that contains word pairs which may not exist in commercial dictionaries is a must. Extracting a bilingual dictionary from the Internet parallel documents is important to add words that are absent from the traditional dictionaries. This paper describes two algorithms to automatically extract an English/Arabic bilingual dictionary from parallel texts that exist in the Internet archive. The system should preferably be useful for many different language pairs. Like most of the systems done, the accuracy of our system is directly proportional to the amount of sentence pairs used. By controlling the system parameters, we could achieve 100% precision for the output bilingual dictionary, but the size of the dictionary is smaller.

关键词： Internet Dictionaries Natural languages Natural language processing information retrieval Data mining Thesauri Automatic control Size control Control systems

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Effect of initial HMM choices in multiple sequence training for gesture recognition

Effect of initial HMM choices in multiple sequence training ...

引用

international conference on information technology: coding and computing (itcc)

作者： N. Liu R.I.A. Davis B.C. Lovell P.J. Kootsookos Intelligent Real-Time Imaging and Sensing (IRIS) Group School of Information Technology and Electrical Engineering University of Queensland Brisbane Australia

We present several ways to initialize and train hidden Markov models (HMMs) for gesture recognition. These include using a single initial model for training (re-estimation), multiple random initial models, and initial models directly computed from physical considerations. Each of the initial models is trained on multiple observation sequences using both Baum-Welch and the Viterbi path counting algorithm on three different model structures: fully connected (or ergodic), left-right, and left-right banded. After performing many recognition trials on our video database of 780 letter gestures, results show that a) the simpler the structure is, the less the effect of the initial model, b) the direct computation method for designing the initial model is effective and provides insight into HMM learning, and c) Viterbi path counting performs best overall and depends much less on the initial model than does Baum-Welch training.

关键词： Hidden Markov models Viterbi algorithm information technology Physics computing Iris Australia Databases Design methodology Speech Handwriting recognition

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