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IEEE Convention of the Electrical and ELectronic Engineers in Israel

作者： Avihay Barazany Royi Levy Yekutiel Avargel Signal & Image Processing Laboratory Department of Electrical Engineering Technion-Israel Institute of Technology Haifa Israel

In this paper, we formulate a speech enhancement problem under multiple hypotheses, assuming an indicator for the lens motor noise presence is available in the time domain. This approach is largely based on an existing speech enhancement algorithm, and was adapted to specifically handle lens motor noises. Hypothetical presence of speech together with an estimation of the stationary noise and the lens motor noise, are considered in the calculation of the desired signal spectral coefficients. Cost parameters control the trade-off between speech distortion and residual transient noise. An optimal estimator, which minimizes the mean-square error of the log-spectral amplitude, is derived, while taking into account the probability of erroneous detection. Experimental results demonstrate a substantial suppression of the motor noise with a minimal degrade to the perceived quality of the desired signal.

关键词： Digital cameras Speech enhancement Lenses Degradation Detectors Background noise Audio recording Costs Noise level Time frequency analysis

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Research and development of signal acquisition unit model

Research and development of signal acquisition unit model

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2nd International Symposium on Information Technologies and Applications in Education, ISITAE 2008

作者： Tao, Baozhuang Zhang, Yichao Lu, Ying Li, Wei Department of Computer Huainan Union University China Institute of Computer Science and Technology Anhui University China Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education Anhui University China

ISBN: (纸本)9780863419133

With core device 8051 Micro-controller and expanding IO-port through Intel 8255A to gather multi-channel signal ,and the final results of data processing are sent out through serial ports. The paper, based on the characteristic of bit operation of 51-serie single-chip and by means of analysis method of mathematical statistics, develops a low-cost, simplestructure, reliable- function and highly efficientalgorithm signal acquisition unit model ,which supplies parallel or serial communication interface and Can be further developed. © 2008 IET.

关键词： Statistics

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Needle segmentation using 3D quick randomized hough transform

Needle segmentation using 3D quick randomized hough transfor...

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1st International Conference on Intelligent Networks and Intelligent Systems, ICINIS 2008

作者： Qiu, Wu Ding, Mingyue Yuchi, Ming Institute for Pattern Recognition and Artificial Intelligence Image Processing and Intelligence Control Key Laboratory of Education Ministry of China Huazhong University of Science and Technology Wuhan Hubei China Department of Biomedical Engineering School of Life Science and Technology Huazhong University of Science and Technology Wuhan Hubei China

ISBN: (纸本)9780769533919

A quick 3D needle segmentation algorithm for 3D US data is described in this paper. The algorithm includes the 3D Quick Randomized Hough Transform (3DGHT), which is based on the 3D Randomized Hough Transform and coarse-fine searching strategy. We tested it with water phantom. The results show that our algorithm works well in 3D US images with angular deviation less than 1 and position deviation less than 1mm, and the computational time of segmentation with 35MB data is within 1s. © 2008 IEEE.

关键词： Hough transforms

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Terrasar-X: Complex image inversion for feature extraction

Terrasar-X: Complex image inversion for feature extraction

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2008 IEEE International Geoscience and Remote Sensing Symposium - Proceedings

作者： Soccorsi, Matteo Datcu, Mihai Gleich, Dušan German Aerospacec Center Remote Sensing Technology Institute Oberpfaffenhofen 82234 Weßling Germany Laboratory for Signal Processing and Remote Control Faculty of Electrical Engineeringand Computer Science University of Maribor Slovenia

ISBN: (纸本)9781424428083

In this paper we present two algorithms for information extraction from Single Look Complex (SLC) Synthetic Aperture Radar (SAR) images. The first algorithm is based on Tikhonov regularization with Total Variation (TV) and a Point-Based Feature (PBF) term. Based on the equivalence of Tikhonov and the Bayesian estimate, the second algorithm is a Maximum A Posteriori (MAP) estimation with a complex-valued Gauss-Markov Random Field (GMRF) in addition to the TV prior. The first algorithm produces a despeckled image preserving fine details and texture. The second algorithm gives a denoised image and in addition the estimated feature parameter vector θ. © 2008 IEEE.

关键词： Synthetic aperture radar

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Research on the multi-objective resource-constrained transport task scheduling problem

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Wuhan Ligong Daxue Xuebao/Journal of Wuhan University of technology 2008年第5期30卷 155-158页

作者： Wang, Jian Wang, Hong-Wei Institute of Systems Engineering Huazhong University of Science and Technology Wuhan 430074 China Key Laboratory of Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan 430074 China

A resource-constrained transport task scheduling problem (RCTTSP) with two optimal objectives was considered, and a multi-objective hybrid genetic algorithm (HGA) was proposed. The proposed algorithm used the serial scheduling method to initialize the population and evaluated the individual. It used the weighted sum method and the rank-based fitness assignment method to assign the individual fitness. Firstly, this paper described the multi-objective RCTTSP and presented the principle of the HGA, and then developed the algorithm to implement several experimental cases with different problem size;lastly the effectiveness and efficiency of the algorithm were compared. The numerical result indicated that the proposed multi-objective HGA can resolve the proposed multi-objective RCTTSP efficiently.

关键词： Hybrid genetic algorithm Multi-objective Resource-constrained Serial scheduling Transport task scheduling

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Method of boundary extraction based on schrödinger equation 21

Method of boundary extraction based on schrödinger equation

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2008 21st ISPRS International Congress for Photogrammetry and Remote Sensing

作者： Lou, Liantang Zhan, Xin Fu, Zhongliang Ding, Mingyue School of Remote Sensing and Information Engineering Wuhan University Wuhan430072 China School of Science Wuhan Institute of Technology Wuhan430073 China Institute for Pattern Recognition and Artificial Intelligence Key Laboratory of Education Ministry for Image Processing and Intelligent Control Huazhong University of Science and Technology Wuhan430074 China

To overcome the main drawbacks of global minimal for active contour models (L. D. Cohen and Ron Kimmel) that the contour is only extracted partially for low SNR images, Method of boundary extraction based on Schrödinger Equation is proposed. Our Method is based on computing the numerical solutions of initial value problem for second order nonlinear Schrödinger equation by using discrete Fourier Transformation. Schrödinger transformation of image is first given. We compute the probability P(b,a) that a particle moves from a point a to another point b according to I-Type Schrödinger transformation of image and obtain boundary of object by using quantum contour model.

关键词： Initial value problems

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Co-scheduling model and algorithm of the three gorges-gezhou dam based on GA

Co-scheduling model and algorithm of the three gorges-gezhou...

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7th World Congress on Intelligent Control and Automation (WCICA 2008), vol.10

作者： Xiaoping Wang Huan Qi Henghui Xiao Xiaopan Zhang Key Laboratory of Image Processing and Intelligent Control Institute of Systems Engineering Huazhong University of Science and Technology Wuhan China

This paper provided a mathematic model for Three Gorges-Gezhou dam co-scheduling problems, based on full analysis of Three Gorges-Gezhou dam's actual needs, to maximize the total throughput of Three Gorges-Gezhou dam, to maximize the utilization ratio of shiplock area and minimize the total navigation shiplock waiting time under eight constraint conditions. Then a scheduling algorithm based on GA was pointed out. The three gorges south lock, Gezhou dam lock, the three gorges north lock were optimization searched separately in the GA algorithm. The scheduling results of the three gorges south lock were taken as the origin of the whole plan period, and also were taken as the basis of the Gezhou dam scheduling together with the ship applied information. The scheduling results of Gezhou dam were regarded as the basis of the three gorges north lock scheduling together with the ship applied information, so repeated, until the optimal scheduling results were given, or the most iterative step was reached. The applied result shows that making a period plan of two dam five lock only needs 2 minutes, and the plan is quite effective according to practical application.

关键词： Genetic algorithm The three gorges-gezhou dam Co-scheduling Mathematical model

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Deconstructing space-frequency correlated ultrawideband MIMO channels

Deconstructing space-frequency correlated ultrawideband MIMO...

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IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

作者： Xuemin Hong Cheng-Xiang Wang John Thompson Ben Allen Wasim Q. Malik Joint Research Institute for Signal and Image Processing Heriot-Watt University Edinburgh UK Joint Research Institute for Signal and Image Processing University of Edinburgh Edinburgh UK Department of Engineering Science University of Oxford Oxford UK Department of Brain and Cognitive Sciences Massachusetts Institute of Technology Cambridge MA USA

Conventional correlation models fail to accurately represent the correlation properties of ultrawideband (UWB) multiple-input multiple-output (MIMO) channels. In our previous work, a framework for constructing correlated UWB MIMO channel models was proposed, where spatial correlation was introduced into both the multipath amplitude and time-of-arrival (ToA) in the channel impulse response. Based on this framework, in this paper we first present a simplified UWB MIMO channel model that represents a reasonable compromise between analytical tractability and model accuracy. We show that this model yields a structured space-frequency (SF) channel covariance matrix, making it suitable for theoretical system performance analysis. To illustrate the merit of this model, we apply it to evaluate the maximum diversity order in SF coded UWB MIMO systems. In contrast to previous work based on conventional wideband MIMO correlated channel models, we show that the maximum diversity order of a UWB MIMO system is not limited by the sum of the ranks of multipath amplitude correlation matrices.

关键词： MIMO Correlation Covariance matrix Wideband Analytical models Receiving antennas Bandwidth

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Evaluation of RSVP and Mobility-aware RSVP Using Performance Evaluation Process Algebra

Evaluation of RSVP and Mobility-aware RSVP Using Performance...

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2008 IEEE International Conference on Communications(ICC 2008)

作者： David I.Laurenson Jane Hillston Institute for Digital Communications Joint Research Institute for Signal & Image Processing School of Engineering & ElectronicsThe University of Edinburgh Laboratory for Foundations of Computer Science School of InformaticsThe University of Edinburgh

As a resource reservation mechanism,the Resource ReSerVation Protocol (RSVP) faces a lot of challenges when applying it to the wireless and mobile *** interworking problems of RSVP and mobility management protocols have been extensively discussed over the last *** the solutions of this problem,mobility-aware RSVP schemes that integrate RSVP and micro-mobility management are becoming more and more ***,the investigation on how much they improve the performance of the basic RSVP is necessary and *** of the traditional simulation based approaches,in this paper we introduce a formal performance evaluation formalism,named Performance Evaluation Process Algebra (PEPA),and employ it to investigate the performance of the basic RSVP and mobility-aware *** performance metrics such as handover blocking probability and signalling cost are presented.

关键词： Protocol net service Evaluation of RSVP and Mobility-aware RSVP Using Performance Evaluation Process Algebra

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Sparse orthonormal transforms for image compression

Sparse orthonormal transforms for image compression

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IEEE International Conference on image processing

作者： Osman G. Sezer Oztan Harmanci Onur G. Guleryuz Center for Signal and Image Processing Georgia Institute of Technology Atlanta GA USA DoCoMo Communications Laboratory USA Inc. Palo Alto CA USA

We propose a block-based transform optimization and associated image compression technique that exploits regularity along directional image singularities. Unlike established work, directionality comes about as a byproduct of the proposed optimization rather than a built in constraint. Our work classifies image blocks and uses transforms that are optimal for each class, thereby decomposing image information into classification and transform coefficient information. The transforms are optimized using a set of training images. Our algebraic framework allows straightforward extension to non-block transforms, allowing us to also design sparse lapped transforms that exploit geometric regularity. We use an EZW/SPIHT like entropy coder to encode the transform coefficients to show that our block and lapped designs have competitive rate-distortion performance. Our work can be seen as nonlinear approximation optimized transform coding of images subject to structural constraints on transform basis functions.

关键词： image coding Cost function Design optimization Rate-distortion Wavelet transforms Codecs Constraint optimization Transform coding signal processing image processing

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