Active image processing is an attempt to overcome some limitations of the classical, intuition based approach for developing image processing solutions. It's goals are to allow for intuitive specification of image...
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This paper describes improvements made to a hybrid analytic/numerical algorithm for optimization of launch vehicle trajectories. Modifications are described which improve the accuracy of the solution. In addition, the...
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The segmentation of surface deformations like scratches or embossed patterns can be decisively supported by using several images taken under different illumination directions. To demonstrate this approach we present t...
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The segmentation of surface deformations like scratches or embossed patterns can be decisively supported by using several images taken under different illumination directions. To demonstrate this approach we present two applications-the segmentation of embossed letters and the detection of grains on grinding wheels-together with two illumination devices which aid in the development of such solutions. We address further the problem of (additive) shading and how at may be solved using conventional approaches based on 'real' or estimated reference images and as well as by artificial reference images obtained by a rendering approach using a model of the setup. Finally we give an outlook on the planning of illumination setups.
In this paper we present two algorithms to derive sequences of morphological gray-scale opening/closing operators from gray-scale (anti-) granulometries which transform images containing textures of two previously kno...
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In this paper we present two algorithms to derive sequences of morphological gray-scale opening/closing operators from gray-scale (anti-) granulometries which transform images containing textures of two previously known classes into images within which segmentation can be done simply by using a threshold.
An easy-to-implement global trajectory tracking algorithm in the class of variable structure systems is designed and analyzed within the single-track dynamical model framework. The algorithm uses measurements of the p...
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An easy-to-implement global trajectory tracking algorithm in the class of variable structure systems is designed and analyzed within the single-track dynamical model framework. The algorithm uses measurements of the position, orientation and the yaw rate of the robot and is robust with respect to the parameter variations.
The role of structural invariants in the solutions of classical linear control problems when regular state feedback is used is enhanced. The structural modification that arise when these problems are extended to the c...
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A sufficient condition, in terms of quadratic stability of matrices, for the class of regular descriptor linear systems which possess no infinite relative eigenvalues is presented. Utilizing this result, the problem o...
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A sufficient condition, in terms of quadratic stability of matrices, for the class of regular descriptor linear systems which possess no infinite relative eigenvalues is presented. Utilizing this result, the problem of stabilization of descriptor linear system via proportional-plus-derivative (PD) state feedback control is converted into two related quadratically stabilization problems, which can be easily solved using linear matrix inequality (LMI) techniques. Based on the same idea, robust stabilization via PD state feedback for uncertain descriptor linear systems, with coefficient matrices belonging to some compact sets in proper matrix spaces, has also been dealt with.
A synthesis of the two major approaches to linear control system design, namely the state-space and the transfer-function ones, can be achieved by use of dynamics assignment, a convenient reference design problem. Stu...
A synthesis of the two major approaches to linear control system design, namely the state-space and the transfer-function ones, can be achieved by use of dynamics assignment, a convenient reference design problem. Students, teachers, and researchers can all benefit from a deeper understanding of the relationships between these two approaches.
Discrete-time symmetric polynomial equations with complex coefficients are studied in the scalar and matrix case. New theoretical results are derived and several resolution algorithms ares proposed and evaluated. The ...
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Discrete-time symmetric polynomial equations with complex coefficients are studied in the scalar and matrix case. New theoretical results are derived and several resolution algorithms ares proposed and evaluated. The algorithms are implemented in the Polynomial Toolbox for Matlab.
The linear equation AX + BY = C is studied, where A , B , and C are given polynomial matrices such that A −1 B is a strictly proper rational matrix. All polynomial matrix solution pairs X , Y such that YX −1 is a prop...
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The linear equation AX + BY = C is studied, where A , B , and C are given polynomial matrices such that A −1 B is a strictly proper rational matrix. All polynomial matrix solution pairs X , Y such that YX −1 is a proper rational matrix are parametrized. The study is motivated by the polo placement techniques in the design of linear control systems.
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