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Recognizing Cursive Arabic Text:Using statistical features and interconnected mono-HMMs

Recognizing Cursive Arabic Text:Using statistical features a...

2011 4th International Congress on image and signal processing(第四届图像与信号处理国际学术会议 CISP 2011)

作者： M S Khorsheed H Al-Omari Image Processing and Signal Analysis & Recognition (IPSAR) Research Group Computer Research Institute King Abdulaziz City for Science and Technology PO Box 6086 Riyadh 11442 Saudi Arabia

This paper presents a cursive Arabic text recognition system. The system decomposes the document image into test line images and extracts a set of simple statistical features from a one-pixel width window which is sliding a cross that text line. It then injects the resulting feature vectors to Hidden Markov Models. The proposed system is applied to a data corpus which includes Arabic text of more than 600 A4-size sheets typewritten in multiple computergenerated fonts.

关键词： Document analysis pattern recognition Arabic text recognition hidden Markov models HTK

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Guest Editorial: Vehicular communications and networks - Part I

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IEEE Journal on Selected Areas in Communications 2011年第1期29卷 1-6页

作者： Wang, Cheng-Xiang Vasilakos, Athanasios V. Murch, Ross D. Stüber, Gordon Shen, Xuemin Sherman Chen, Wai Kosch, Timo Joint Research Institute for Signal and Image Processing School of Engineering and Physical Sciences Heriot-Watt University Edinburgh EH14 4AS United Kingdom Dept. of Computer and Telecommunications Engineering University of Western Macedonia Kozani 50100 Greece Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA 30332-0250 United States Department of Electrical and Computer Engineering University of Waterloo Waterloo ON N2L 3G1 Canada Applied Research Telcordia Technologies Inc. Piscataway NJ 07054 United States BMW Group Research and Technology Hanauer Strasse 46 D-80992 Munich Germany

Part I of this special issue is devoted to the physical layer, MAC layer, and physical-link cross-layer design technologies of vehicular communications and networks. There are 21 papers in this issue.

关键词： Communication research iodine VEHICULAR COMMUNICATIONS

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ICIC Express Letters 2011年第3期5卷 727-731页

作者： Li, Li Zhang, David Ruan, Liuzhao Institute of Computer Graphics and Image Processing Hangzhou Dianzi University Second Avenue Xiashagaojiao District Hangzhou 310018 China Centre for Multimedia Signal Processing and Department of Computing Biometrics Research Centre Hong Kong Polytechnic University Hung Horn Kowloon Hong Kong

The popular formulas of evaluating the similarity of digital watermarks have serious drawbacks: when the similarity degree is 1, the watermarks are not unique. This paper firstly analyzes the drawbacks in the popular formulas, then proposes a new similarity degree formula, which weakens the shortcomings of the existing formulas and overcomes the lack of uniqueness in theory. From the experimental results, the new formula not only does well in evaluating the watermark's similarity degree, but also is in good accordance with visual perception. © 2011 ISSN 1881-803X.

关键词： Digital watermarking

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Finding protein active sites using approximate sub-graph isomorphism

Finding protein active sites using approximate sub-graph iso...

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Middle East Conference on Biomedical Engineering (MECBME)

作者： Mohammad Ebrahim Abbasi Dezfouli Seyed Shahriar Arab Emad Fatemizadeh Najmeh Hosseynimanesh Electrical Engineering Department BiSIPL (Biomedical Image and Signal Processing Lab) Sharif University of Technology Tehran Iran School of Computer Science Institute for Research in Fundamental Sciences Tehran Iran

Prediction of the amino acids that have a catalytic effect on the enzymes is a major stage in appointing the activity of the enzymes and classification. The biological activity of a protein usually depends on the existence of a small number of amino acids. Recently, many algorithms have been proposed in the literature for finding these amino acids which are complex and time consuming. In this paper, we will introduce a new method for predicting the active sites that will use the spatial coordinates and the type of amino acids that contain the active sites. In order to increase the speed we use an approximate graph isomorphism algorithm. Furthermore, this algorithm allows us to find several active sites for a protein and order them according to a RMSD (Root Mean Square Deviation) number which has several applications in biology.

关键词： Proteins Amino acids Approximation algorithms Protein engineering Classification algorithms Databases

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2-User multiple access spatial modulation

2-User multiple access spatial modulation

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IEEE Globecom Workshops

作者： Nikola Serafimovski Sinan Sinanović Abdelhamid Younis Marco Di Renzo Harald Haas Institute for Digital Communications Joint Research Institute for Signal and Image Processing School of Engineering University of Edinburgh Edinburgh UK Laboratory of Signals and Systems (L2S) French National Center for Scientific Research (CNRS) Ecole Supérieure dElectricité (SUPELEC) University of Paris Sud-XI Paris France

Spatial modulation (SM) is a recently proposed approach to multiple-input-multiple-output (MIMO) systems which entirely avoids inter-channel interference (ICI) and requires no synchronisation between the transmit antennas, while achieving a spatial multiplexing gain. SM allows the system designer to freely trade off the number of transmit antennas with the signal constellation. Additionally, the number of transmit antennas is independent from the number of receive antennas which is an advantage over other multiplexing MIMO schemes. Most contributions thus far, however, have only addressed SM aspects for a point-to-point communication systems, i.e. the single-user scenario. In this work we seek to characterise the behaviour of SM in the interference limited scenario. The proposed maximum-likelihood (ML) detector can successfully decode incoming data from multiple sources in an interference limited scenario and does not suffer from the near-far problem.

关键词： signal to noise ratio Transmitting antennas Detectors Receiving antennas Bit error rate Modulation Interference

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Efficient dictionary based video coding with reduced side information

Efficient dictionary based video coding with reduced side in...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： Je-Won Kang C.-C. Jay Kuo Robert Cohen Anthony Vetro Ming Hsieh Department of Electrical Engineering and Signal and Image Processing Institute University of Southern California Los Angeles CA USA Mitsubishi Electric Research Laboratories Inc. Cambridge MA USA

In this paper, we propose a novel dictionary based video coding technique with adaptive construction of over complete dictionaries and advanced coding methods tailored to sparse signal representations. A set of dictionaries is trained off-line using inter or intra predicted residual samples and is applied for encoding. New coding tools are developed so that the encoder can more compactly represent the residual signal. The same set of dictionary elements can be reused for neighboring blocks, and the optimal number of dictionary elements can be decided using rate-distortion optimization. Experimental results demonstrate that the proposed algorithm yields both improved coding performance and improved perceptual quality at low bit rates.

关键词： Dictionaries Encoding Video coding Discrete cosine transforms Indexes Matching pursuit algorithms image coding

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Analysis of microscopy and reconstructive images for applications in medicine and biology

Analysis of microscopy and reconstructive images for applica...

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IEEE International Conference on image processing

作者： G. Johnston D. R. Burton F. Lilley A. Doyle M. F. Murphy G. Madden M. A. Gdeisat C. J. Moore T. Marchant B. Matuszewski General Engineering Research Institute Liverpool John Moores University Liverpool UK North Western Medical Physics The Christie NHS Foundation Trust Manchester UK Applied Digital Signal and Image Processing Research Centre UCLan Preston UK

An investigation into orientation preferences shown by actin fibres within ex-situ actin as imaged by Atomic Force Microscopy (AFM) is described. Actin is a primary cytoskeletal component and is believed to play a vital role in cell structure. Actin structure images measured by AFM were analysed using automated pre-processing steps. These steps were identical for the production of an initial binary image, which was then processed by both Hough transformation and thinning. Results obtained question the validity of using the Hough transform approach, as bias could not easily be eliminated, and hence the Hough transform method was deemed to be unsuitable for this application and instead the thinning technique was used to identify and locate actin orientation within the AFM images. The results show that polymerised ex-situ actin fibres appears to display a bimodal distribution of orientation, with a 90 degree separation, with a significant co-efficient of bimodality of 0.656.

关键词： Transforms image processing Microscopy Biology Polymers Histograms Conferences

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First-moment multi-object forward-backward smoothing

First-moment multi-object forward-backward smoothing

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作者： Clark, Daniel E. Joint Research Institute in Signal and Image Processing Heriot-Watt University Edinburgh United Kingdom

ISBN: (纸本)9780982443811

The optimal solution to the problem of detecting, tracking and identifying multiple targets can be found through a direct generalisation of the Bayes filter to multi-object systems using Mahler's Finite Set Statistics. Due to the inherent complexity of the multi-object Bayes filter, Mahler proposed to propagate the first-order multi-object moment density, known as the Probability Hypothesis Density (PHD), instead of the multi-object posterior. This was derived using the concept of the probability generating functional (***.) from point process theory. In this paper, I derive multi-object first-moment smoothers for forward-backward smoothing through a new formulation of the ***. smoother which takes advantage of the ***. Bayes update. This formulation permits the straightforward derivation of first-moment multi-object smoothers, including the PHD smoother.

关键词： Probability

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Extended object filtering using spatial independent cluster processes

Extended object filtering using spatial independent cluster ...

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作者： Swain, Anthony Clark, Daniel Joint Research Institute in Signal and Image Processing Heriot-Watt University Edinburgh United Kingdom

ISBN: (纸本)9780982443811

Recent research into multi-object filtering for non-standard targets introduced alternative approaches for target group representation. In these approaches a measurement model (likelihood) was suggested that led to a representation of the measurements as a spatial point process, namely a Poisson point process. In this paper we take a more traditional approach to extended target tracking. We assume a 'standard' measurement model (at most one measurement generated from a target point), but represent the target group (extended targets) as a spatial cluster process, in particular an independent cluster process with a fixed distribution on the component (daughter) process. With this assumption we are able to derive approximate measurement-update equations for the first order moment density of the extended object Bayes filter in a number of scenarios. Such approximations are Bayes optimal and provide estimates for the number of clusters (extended targets) and their locations.

关键词： Target tracking

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Segmentation of cellular structures in actin tagged fluorescence confocal microscopy images

Segmentation of cellular structures in actin tagged fluoresc...

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IEEE International Conference on image processing

作者： B. J. Matuszewski M. F. Murphy D. R. Burton T. E. Marchant C. J. Moore A. Histace F. Precioso Applied Digital Signal and Image Processing Research Centre UCLan Preston UK General Engineering Research Institute Liverpool John Moores University Liverpool UK North Western Medical Physics The Christie NHS Foundation Trust Manchester UK ETIS UMR 8051 CNRS France

The paper reports on a novel method for reconstruction of cellular features including cell nuclei and cellular boundaries from actin tagged fluorescence confocal microscopy images. Such reconstruction can provide spatial context for subsequent quantitative analysis of changes to actin organisation and cell morphology in both controlled and stressed cell cultures. The proposed method is fully automatic and is formulated within active contour multiphase level set framework. The derived level set evolution PDEs combine previously proposed curvature and advection flows with propagation flow defined by specially designed set of geodesic distance maps. Additionally the proposed PDEs include additional components to impose known inclusion/exclusion topological constraints between cellular structures. The paper gives an overview of the proposed methodology as well as reports on initial results obtained for monolayer of human prostate cells (PNT2) culture visualised using acting tagged fluorescence confocal microscopy.

关键词： image segmentation Level set Microscopy Active contours Fluorescence Mathematical model Equations

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