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13th European Signal Processing Conference, EUSIPCO 2005

作者： Sirin, Tuba Saglam, Mehmet Izzet Erer, Isin Gokmen, Muhittin Ersoy, Okan Informatics Institute Advanced Technologies in Engineering Computer Science and Engineering Maslak Istanbul 34469 Turkey Informatics Institute Advanced Technologies in Engineering Satellite Communication and Remote Sensing Program Maslak Istanbul 34469 Turkey Faculty of Electrical and Electronic Engineering Electronics and Communication Department Maslak Istanbul 34469 Turkey Faculty of Electrical and Electronic Engineering Computer Engineering Department Istanbul Technical University Maslak Istanbul 34469 Turkey Purdue University School of Electrical and Computer Engineering West Lafayette IN United States

ISBN: (纸本)1604238216

Most edge detection algorithms include three main stages: smoothing, differentiation, and labeling. In this paper, we evaluate the performance of algorithms in which competitive learning is applied first to enhance edges, followed by an edge detector to locate the edges. In this way, more detailed and relatively more unbroken edges can be found as compared to the results when an edge detector is applied alone. The algorithms compared are K-Means, SOM and SOGR for clustering, and Canny and GED for edge detection. Perceptionally, best results were obtained with the GED-SOGR algorithm. The SOGR is also considerably simpler and faster than the SOM algorithm.

关键词： Edge detection

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Edge detection in multispectral remote sensing images

Edge detection in multispectral remote sensing images

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International Conference on Recent Advances in Space Technologies (RAST)

作者： T. Sirin M.I. Saglam I. Erer M. Gokmen O. Ersoy Informatics Institute Advanced Technologies in Engineering Computer Science and Engineering Istanbul Technical University Istanbul Turkey Informatics Institute Advanced Technologies in Engineering Istanbul Technical University Istanbul Turkey Faculty of Electrical and Electronic Engineering Electronics and Communication Department Istanbul Technical University Istanbul Turkey Faculty of Electrical and Electronic Engineering Computer Engineering Department Istanbul Technical University Istanbul Turkey School of Electrical and Computer Engineering Purdue University West Lafayette IN USA

In this paper, we discuss edge detection by first using a clustering algorithm followed by a known edge detection filter such as Canny or generalized edge detector (GED). We developed a new clustering method called Self-Organizing Global Ranking (SOGR). Comparative results with multispectral satellite images including SOGR, SOM and K Means clustering methods are discussed. The results show that the two-stage algorithms are better than single stage edge detector algorithms.

关键词： Image edge detection Remote sensing Clustering algorithms Detectors Filters Clustering methods Laplace equations informatics Image segmentation Biomembranes

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A comparative evaluation of competitive learning algorithms for edge detection enhancement

A comparative evaluation of competitive learning algorithms ...

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European Signal Processing Conference (EUSIPCO)

作者： Tuba Sirin Mehmet Izzet Saglam Isin Erer Muhittin Gokmen Okan Ersoy Informatics Institute Computer Science and Engineering Informatics Institute Satellite Communication and Remote Sensing Program Faculty of Electrical and Electronic Engineering Electronics and Communication Department Faculty of Electrical and Electronic Engineering Istanbul Technical University Maslak Istanbul TURKEY Purdue University School of Electrical and Computer Engineering West Lafayette Indiana USA

关键词： Image edge detection Image segmentation Vectors Abstracts Filtering algorithms Erbium Training

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A novel DFT/RDFT based subband representation for the fusion of remote sensing images

A novel DFT/RDFT based subband representation for the fusion...

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International Conference on Recent Advances in Space Technologies (RAST)

作者： M. Sezgin I. Erer O.K. Ersoy Informatics Institute Advanced Technologies in Engineering Satellite Communication and Remote Sensing Istanbul Technical University Istanbul Turkey Faculty of Electrical and Electronic Engineering Electronics and Communication Engineering Department Istanbul Technical University Istanbul Turkey School of Electrical and Computer Engineering Purdue University West Lafayette IN USA

We present a new fusion algorithm using a novel multidecomposition approach based on a DFT/RDFT-based symmetric, zero-phase, nonoverlapping digital filter bank representation. For the panchromatic image and each band of the multispectral image, the lowpass and highpass subband components are obtained in a tree structure using zero-phase filters implemented by the RDFT. The approximation subband of the multispectral image is merged with the detail subbands of the panchromatic image. The fused data is recovered from the subband signals by a new perfect reconstruction algorithm. This process is performed on each band of the multispectral image to obtain the final fused high resolution multispectral image.

关键词： Remote sensing Discrete Fourier transforms Spatial resolution Image resolution Multispectral imaging Wavelet transforms Signal resolution Digital filters Satellites Principal component analysis

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DFT/RDFT bank approach for speckle reduction in SAR images

DFT/RDFT bank approach for speckle reduction in SAR images

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： M. Sezgin I. Erer O.K. Ersoy Informatics Institute Advanced Technologies in Engineering Satellite Communication and Remote Sensing Istanbul Technical University Istanbul Turkey Faculty of Electrical and Electronic Engineering Electronics and Communication Engineering Department Istanbul Technical University Turkey School of Electrical and Computer Engineering Purdue University West Lafayette IN USA

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Integrating distributed composite objects into java environment

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3261卷 322-331页

作者： Yilmaz, Guray Erdogan, Nadia Turkish Air Force Academy Computer Eng. Dept. Yeşilyurt 34149 Istanbul Turkey Istanbul Technical University Electrical-Electronics Faculty Computer Engineering Dept. Ayazaga 80626 Istanbul Turkey

This paper introduces a new programming model for distributed systems, distributed composite objects (DCO), to meet efficient implementation, transparency, and performance demands of distributed applications with cooperating users connected through the internet. It allows the representation of an object as a collection of sub-objects and enhances the object distribution concept by implementing replication at the sub-object level and only when demanded. DCOBE, a DCO-based programming environment, conceals implementation details of the DCO model behind its interface and provides basic mechanisms. An important feature of the programming framework is transparency. © Springer-Verlag 2004.

关键词： Transparency

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Stability of linear time invariant systems with interval fractional orders and interval coefficients

Stability of linear time invariant systems with interval fra...

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ICCC 2004 - Second IEEE International Conference on Computational Cybernetics

作者： Petráš, Ivo Chen, Yangquan Vinagre, Bias M. Podlubny, Igor Department of Informatics and Process Control BERG Faculty Technical University of Kosice B. Nemcovej 3 042 00 Kosice Slovakia Dept. of Electrical and Computer Engineering Utah State University Logan UT 84322-4160 United States Dept. of Electronic and Electromechanical Engineering Industrial Engineering School University of Extramadura Avda. De Elvas s/n 06071-Badajoz Spain

ISBN: (纸本)0780385888

This paper considers the stability of the fractional-order linear time-invariant systems with interval type uncertainties in both fractional orders and the relevant coefficients. It is an extension of our previous result on the robust stability analysis of the interval type uncertain fractional order LTI systems with crisply known fractional orders. We have proposed a stability check procedure for uncertain LTI systems with interval fractional orders and interval coefficients. The procedure is demonstrated with some simple examples. © 2004 IEEE.

关键词： System stability

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"UML-ising" formal techniques

Lecture Notes in Computer Science (including subseries Lectu...

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Lecture Notes in computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) 2004年 3147卷 423-450页

作者： Bjørner, Dines George, Chris W. Haxthausen, Anne E. Madsen, Christian Krog Holmslykke, Steffen Pěnička, Martin Computer Science and Engineering Dept. Informatics and Mathematical Modelling Inst. Technical University of Denmark DK-2800 Kgs. Lyngby Denmark UNU/IIST P.O.Box 3058 China Rovsing A/S Dyregårdsvej 2 DK-2740 Skovlunde Denmark Faculty of Transportation Czech Technical University Na Florenci 25 CZ-11000 Prague 1 Czech Republic

This invited paper presents a number of correlated specifications of example railway system problems. They use a variety of partially or fully integrated formal specification. The paper thus represents a mere repository of what we consider interesting case studies. The existence of the Unified Modeling Language [10,67,36,20] has caused, for one reason or another, the research community to try formalise one or another facet of UML. In this paper we report on another way to achieve what UML attempts to achieve: Broadness of application, convenience of notation, and multiplicity of views. Whether these different UML views are unified, integrated, correlated or merely co-located is for others to dispute. We also seek to support multiple views, but are also in no doubt that there must be sound, well defined relations between such views. We thus report on ways and means of integrating formal techniques such as RAISE (RSL) [58,59], Petri Nets [56,62,37,61,41], Message and Live Sequence Charts [42,43,44,64,13], Statecharts [23,24,26,27], RAISE with Timing (TRSL) [18,45,46], and TRSL with Duration Calculus [79,30]. In this way one achieves a firm foundation for combined uses of these formal development techniques, one that can be believably deployed for as wide a spectrum, or even a wider spectrum of software (and hardware) development, as, respectively than UML. © Springer-Verlag Berlin Heidelberg 2004.

关键词： Petri nets

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Typing the behavior of objects and components using session types

Typing the behavior of objects and components using session ...

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Foclasa 2002, Foundations of Coordination Languages and Software Architectures (Satellite Workshop of CONCUR 2002)

作者： Vallecillo, Antonio Vasconcelos, Vasco T. Ravara, António Dept. of Computer Science University of Málaga Dept. of Informatics Faculty of Sciences University of Lisbon CLC and Dept. of Mathematics IST Technical University of Lisbon

This paper describes a proposal for typing the behavior of objects in component models. Most component models, CORBA in particular, do not offer any support for expressing behavioral properties of objects beyond the Static" information provided by IDLs. We build on the works by Honda et al. [6] and Gay and Hole [5] to show how session types can be effectively used for describing protocols, extending the information currently provided by object interfaces. We show how session types not only allow high level specifications of complex object interactions, but also allow the definition of powerful interoperability tests at the protocol level, namely compatibility and substitutability of objects. © 2003 Published by Elsevier Science B.V.

关键词： Software engineering

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A spectral–spatial classification algorithm for multispectral remote sensing data

A spectral–spatial classification algorithm for multispectr...

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Joint International Conferences on Artificial Neural Networks and Neural Information Processing, ICANN/ICONIP 2003

作者： Karakahya, Hakan Yazgan, Bingül Ersoy, Okan K. Istanbul Technical University Informatics Institute Advanced Technologies in Engineering Maslak Istanbul34469 Turkey Istanbul Technical University Electronics and Communication Dept. Maslak Istanbul34469 Turkey Purdue University School of Electrical and Computer Engineering West LafayetteIN United States

ISBN: (纸本)3540404082

This paper aims at achieving improved land cover classification performance over conventional per-pixel classifiers as well as spectral-spatial classifiers such as ECHO (Extraction and Classification of Homogeneous Objects) algorithm. The proposed algorithm is a two-stage process, which makes use of the contextual information from neighboring pixels. First, a spatial filter is used to achieve more homogeneous regions. Secondly, maximum likelihood pixel classifier is employed to classify the land covers. The experimental results indicate that improved classification accuracy and smoother (more acceptable) thematic maps are achieved than what is obtained with the other methods considered. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Pixels

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