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Noise reduction in DNA microarray images based on digital path approach 5

Noise reduction in DNA microarray images based on digital pa...

引用

5th IFAC Symposium on Modelling and control in Biomedical Systems 2003

作者： Smolka, Bogdan Plataniotis, Konstantinos N. Lukac, Rastislav Venesanopoulos, Anastasios N. Department of Automatic Control Silesian University of Technology Akademicka J6 Str. Gliwice44-101 Poland Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Canada Slovak Image Processing Center Jarkova 343 Dobsina049 25 Slovakia

In this work we apply the new noise reduction method for the enhancement of the images of gene chips. We demonstrate that the new technique is capable of reducing various kinds of noise present in microarray images and that it enables efficient spot location and estimation of the gene expression level due to the smoodiing effect and preservation of the spot edges. This paper contains the comparison of the new technique of noise reduction with the standard procedures used for the processing of vector valued images, as well as examples of the efficiency of the new algorithm when applied to typical cDNA microarray images. Copyright © 2003 IF AC.

关键词： Image enhancement

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A new robust iterative learning control algorithm for application on a gantry robot

A new robust iterative learning control algorithm for applic...

引用

International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： J.J. Hatonen T.J. Harte D.H. Owens J.D. Ratcliffe P.L. Lewin E. Rogers Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK Systems Engineering Laboratory University of Oulu Finland Department of Electronics and Computer Science University of Southampton UK

In this paper a new robust steepest-descent algorithm for discrete-time iterative learning control is introduced for plant models with multiplicative uncertainty. A theoretical analysis of the algorithm shows that if a tuning parameter in the algorithm is selected to be sufficiently large, the algorithm will result in monotonic convergence if the plant uncertainty satisfies a positivity condition. This is a major improvement when compared to the standard steepest-descent algorithm, which lacks a mechanism for finding a balance between convergence speed and robustness. Experimental work on a gantry robot is performed to demonstrate that the algorithm results in near perfect tracking in the limit.

关键词： Robust control Iterative algorithms Robots Convergence Uncertainty Robustness Robotics and automation Systems engineering and theory automatic control Laboratories

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Stability and stabilisation of 2D discrete linear systems with multiple delays

Stability and stabilisation of 2D discrete linear systems wi...

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IEEE International Symposium on Circuits and Systems (ISCAS)

作者： W. Paszke K. Gatkowski J. Lam Shengyuan Xu E. Rogers D.H. Owens Institute of Control and Computation Engineering University of Zielona Gora Gora Poland Department of Mechanical Engineering University of Hong Kong China Department of Electronics and Computer Science University of Southampton UK Department of Automatic Control and Systems Engineering University of Sheffield UK

In this paper, we study the stability and the stabilisation of 2D discrete linear systems with multiple state delays. All of the new results obtained are based on analysis of the Fornasini-Marchesini state space model with delays and the resulting conditions are given in terms of linear matrix inequalities (LMIs). A numerical example is given to illustrate the effectiveness of the overall approach.

关键词： Stability Linear systems Delay systems Linear matrix inequalities Symmetric matrices automatic control Delay lines Boundary conditions control engineering computing Mechanical engineering

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A delay systems approach to linear differential repetitive processes: controllability and optimization 4

A delay systems approach to linear differential repetitive p...

引用

4th IFAC Workshop on Time Delay Systems, TDS 2003

作者： Dymkou, S. Rogers, E. Dymkov, M. Galkowski, K. Owens, D.H. School of Information Technology and Mathematical Sciences University of Ballarat VIC33353 Australia Department of Electronics and Computer Science University of Southampton SouthamptonSO17IBJ United Kingdom Institute of Mathematics National Academy of Sciences of Belarus Surganov 11 Minsk220072 Belarus Institute of Control and Computation Engineering Technical University of Zielona Gora Poland Department of Automatic Control and Systems Engineering University of Sheffield SheffieldSI3JD United Kingdom

Differential linear repetitive processes are a class of continuous-discrete 2D linear systems of both systems theoretic and applications interest. The feature which makes them distinct from other classes of such systems is that information propagation in one of the two independent directions only occurs over a finite interval. Applications areas include iterative learning control and iterative solution algorithms for classes of dynamic nonlinear optimal control problems based on the maximum principle. In this paper, we investigate further the structural links between differential linear repetitive processes and a special class of time delay systems. This leads to some significant new controllability and optimal control results for these processes. © 2003 IFAC.

关键词： Time delay

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Sigmoidal weighted vector directional filter 1

引用

Lecture Notes in computer Science

作者： Lukac, Rastislav Smolka, Bogdan Plataniotis, Konstantinos N. Venetsanopoulos, Anastasios N. Slovak Image Processing Center Jarkova 343 049 25 Dobsina Slovakia Department of Automatic Control Silesian University of Technology Akademicka 16 Str. 44-101 Gliwice Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Canada

ISBN: (数字)9783540365921

ISBN: (纸本)9783540009214

In this paper, we provide and analyze a sigmoidal optimization of a recently developed class of weighted vector directional filters (WVDFs) outputting the input multichannel sample associated with the minimum sum of weighted angular distances to other input samples. Because the WVDFs can perform a number of smoothing operations in dependence on the weight coefficients, the aim of this paper is to adapt the WVDF behavior to statistical properties of noise and original color image. The filtering results and the complete analysis of the sigmoidal function based WVDF optimization are also provided. © Springer-Verlag Berlin Heidelberg 2003.

关键词： Bandpass filters

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Synthesizing distributed controllers for the safe operation of ConnectedSpaces

Synthesizing distributed controllers for the safe operation ...

引用

IEEE International Conference on Pervasive Computing and Communications (PerCom)

作者： B. Sridharan A.P. Mathur Kai-Yuan Cai Software Engineering Research Center Department of Computer Sciences Purdue University West Lafayette IN USA Department of Automatic Control Beijing Aeronautics and Astronautics University Beijing China

A collection of one or more devices, each described by its digital device manual and reachable over a network, is a ConnectedSpace. A set of safety policies may be enforced on a ConnectedSpace to ensure the safety of the environment in which the ConnectedSpace is deployed. The enforcement of these safety policies by one or more safely controllers governs the behavior of the devices within the ConnectedSpace. We propose a policy-based partitioning scheme for synthesizing k distributed safety controllers such that: (a) each device is guaranteed to be controlled by no more than two controllers, and (b) each policy is guaranteed to be enforced by exactly one controller. We present an experimental evaluation of our scheme. The experimental results show that the scheme is scalable with respect to the number of devices and the number of policies. We also show how safety controllers that are correct with respect to the policies, are synthesized using the theory of supervisory control.

关键词： Distributed control Safety devices automatic control Medical services Aerospace electronics Aircraft navigation Communication system control Supervisory control Remote monitoring Hospitals

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New approach to the impulsive noise removal in microarray images 5

New approach to the impulsive noise removal in microarray im...

引用

5th IFAC Symposium on Modelling and control in Biomedical Systems 2003

作者： Lukac, Rastislav Smolka, Bogdan Plataniotis, Konstantinos N. Venetsanopoulos, Anastasios N. Slovak Image Processing Center Jarkova 343 Dobsina049 25 Slovakia Department of Automatic Control Silesian University of Technology Akademicka 16Str. Gliwice44-101 Poland Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road Toronto Canada

In this paper a new method of impulsive noise reduction in microarray images is presented. The new technique is capable of attenuating impulsive noise, while preserving the sharpness of the image edges. Extensive simulations reveal that the new method outperforms significantly the standard techniques widely used in multivariate signal processing. In this work we apply the new noise reduction method for the enhancement of the images of the microarray chips. We demonstrate that the new technique is capable of reducing impulsive noise, which is very often present in the microarray images and that it enables efficient spot localization and estimation of the gene expression level, due to the smoothing effect and preservation of the spot edges. This paper contains the comparison of the efficiency of the new technique of noise reduction with the standard procedures used for the processing of vector valued images, as well as examples of the efficiency of the new algorithm when applied to typical microarray images. Copyright © 2003 IF AC.

关键词： Impulse noise

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引用

IEEE International Conference on Image Processing

作者： B. Smolka K.N. Plataniotis R. Lukac A.N. Venetsanopoulos Department of Automatic Control Silesian University of Technology Poland The-Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto Toronto ON Canada

In this paper a novel approach to the problem of impulsive noise reduction in color images based on the nonparametric density estimation is presented. The basic idea behind the new image filtering technique is the maximization of the similarities between pixels in a predefined filtering window. The new method is faster than the standard vector median filter (VMF) and preserves better edges and fine image details. Simulation results show that the proposed method outperforms standard algorithms of the reduction of impulsive noise in color images.

关键词： Colored noise Color Filters Filtering Pixel Noise reduction Strontium Educational institutions Tail Noise measurement

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Weighted vector median optimization 4

Weighted vector median optimization

引用

4th EURASIP Conference Focused on Video / Image Processing and Multimedia Communications, EC-VIP-MC 2003

作者： Lukac, R. Plataniotis, K.N. Smolka, B. Venetsanopoulos, A.N. Slovak Image Processing Center Jarkova 343 Dobsina049 25 Slovakia Edward S. Rogers Sr. Department of Electrical and Computer Engineering University of Toronto 10 King's College Road TorontoON Canada Department of Automatic Control Silesian University of Technology Akademicka 16 Str. Gliwice44-101 Poland

ISBN: (纸本)9531840547

In this paper, a vector generalization of weighted median optimization approaches is provided. The proposed optimized weighted vector median filters utilize the relationship between standard median filter and vector median filter and also take the advantage of the generalized adaptive optimization algorithms initially developed for weighted median filters. © 2003 Faculty of Electrical engineering and Co.

关键词： Adaptive filtering

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H/sub /spl infin// control of discrete linear repetitive processes

H/sub /spl infin// control of discrete linear repetitive pro...

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IEEE Conference on Decision and control

作者： W. Paszke K. Galkowski E. Rogers D.H. Owens Institute of Control and Computation Engineering University of Zielona Góra Zielona Góra Poland Department of Electronics and Computer Science University of Southampton Southampton UK Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK

Repetitive processes are a distinct class of 2D systems (i.e. information propagation in two independent directions) of both systems theoretic and applications interest. They cannot be controlled by direct extension of existing techniques from either standard (termed 1D here) or 2D systems theory. Here we give new results on the relatively open problem of the design of physically based control laws using an H/sub /spl infin// setting. These results are for the sub-class of so-called discrete linear repetitive processes which arise in applications areas such as iterative learning control.

关键词： Iterative algorithms control systems Optimal control Stability Linear systems State-space methods control engineering computing computer science Systems engineering and theory Application software

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