Now showing items 18-37 of 210

    • Causal power series and the nonlinear standard H∞ problem 

      Foias, Ciprian; Gu, Caixing; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1997-12)
      Using a power series approach, we describe a design procedure applicable to analytic nonlinear plants. Our technique is a generalization of the linear H∞ theory. We can now use this theory to solve the full standard problem ...
    • Characteristics of second harmonic generation of Lamb waves in nonlinear elastic plates 

      Mueller, Martin Fritz; Kim, Jin-Yeon; Qu, Jianmin; Jacobs, Laurence J. (Georgia Institute of TechnologyAcoustical Society of America, 2010-04)
      This paper investigates the characteristics of the second harmonic generation of Lamb waves in a plate with quadratic nonlinearity. Analytical asymptotic solutions to Lamb waves are first obtained through the use of a ...
    • Color histogram equalization through mesh deformation 

      Pichon, Eric; Niethammer, Marc; Sapiro, Guillermo (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2003-09)
      In this paper we propose an extension of grayscale histogram equalization for color images. For aesthetic reasons, previously proposed color histogram equalization techniques do not generate uniform color histograms. Our ...
    • Comparative Analysis of Kernel Methods for Statistical Shape Learning 

      Rathi, Yogesh; Dambreville, Samuel; Tannenbaum, Allen R. (Georgia Institute of TechnologySpringer Verlag, 2006-05)
      Prior knowledge about shape may be quite important for image segmentation. In particular, a number of different methods have been proposed to compute the statistics on a set of training shapes, which are then used for a ...
    • Computational Algebraic Geometry and Switching Surfaces in Optimal Control 

      Walther, Uli; Georgiou, Tryphon T.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1999-12)
      A number of problems in control can be reduced to finding suitable real solutions of algebraic equations. In particular, such a problem arises in the context of switching surfaces in optimal control. Recently, a powerful ...
    • Computational methods for the H∞ control of distributed systems 

      Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1991-12)
      Some explicit design examples using a frequency-domain (skew Toeplitz) approach in the H∞ optimization of distributed systems are discussed. The emphasis is on the computational aspects of this methodology, which allows ...
    • Conformal Flattening ITK Filter 

      Gao, Yi; Melonakos, John; Tannenbaum, Allen R. (Georgia Institute of TechnologyInsight Software Consortium, 2006-10-01)
      This paper describes the Insight Toolkit (ITK) Conformal Flattening filter: itkConformalFlatteningFilter. This ITK filter is an implementation of a paper by Sigurd Angenent, et al., "On the Laplace-Beltrami Operator and ...
    • Conformal flattening maps for the visualization of vessels 

      Zhu, Lei; Haker, Steven; Tannenbaum, Allen R. (Georgia Institute of TechnologySociety of Photo-Optical Instrumentation Engineers, 2002-02-24)
      In this note, we employ a conformal mapping technique for flattening branching tubular structures for visualization of MRA and CT volumetric vessel imagery. This may be used for the study of possible vessel pathology ...
    • Conformal Flattening of Brain Ventricles 

      Melonakos, John; Gao, Yi; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2006-10)
    • Conformal Surface Parameterization for Texture Mapping 

      Haker, Steven; Angenent, Sigurd; Tannenbaum, Allen R.; Kikinis, Ron; Sapiro, Guillermo; Halle, Michael (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2000-04)
      We give an explicit method for mapping any simply connected surface onto the sphere in a manner which preserves angles. This technique relies on certain conformal mappings from differential geometry. Our method provides a ...
    • Conservation-Minded Evolution of Shape 

      Kimia, Benjamin B.; Tannenbaum, Allen R.; Zucker, Steven W. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1990-09)
      Most natural and artificial systems rely heavily on vision to recognize, manipulate, and navigate within a world of objects. Although shape is a key element in this process, its representation and analysis have proved to ...
    • A Constructive Solution to the Gain-Phase Margin Problem 

      Cockburn, Juan C.; Sidar, Yariv; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1992-12)
      The authors present an algorithm for solving a certain class of robust stabilization problems where the uncertainty is independent of frequency. This amounts to solving a Nevanlinna-Pick interpolation problem together with ...
    • Control of Slowly-Varying Linear Systems 

      Kamen, Edward W.; Khargonekar, Pramod P.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1989-12)
      State feedback control of slowly varying linear continuous-time and discrete-time systems with bounded coefficient matrices is studied in terms of the frozen-time approach. This study centers on pointwise stabilizable ...
    • Controller Design for Unstable Distributed Plants 

      Özbay, Hitay; Smith, Malcolm C.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1990-05)
      In this paper we solve the H∞ mixed sensitivity minimization problem for a class of unstable distributed systems. The solution is based on an extension of the skew Toeplits methodology developed in [1], [3], [4], [6], [10]. ...
    • Controller Synthesis with Guaranteed Closed-Loop Phase Constraints 

      Haddad, Wassim M.; Chellaboina, Vijay Sekhar; Gholami, Behnood (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2007-12)
      In this paper, we present an analysis and synthesis framework for guaranteeing that the phase of a single-input, single-output closed-loop transfer function is contained in the interval [-alpha, alpha] for a given alpha>0 ...
    • A Coupled Global Registration and Segmentation Framework With Application to Magnetic Resonance Prostate Imagery 

      Gao, Yi; Sandhu, Romeil; Fichtinger, Gabor; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2010-10)
      Extracting the prostate from magnetic resonance (MR) imagery is a challenging and important task for medical image analysis and surgical planning. We present in this work a unified shape-based framework to extract the ...
    • Cubical homology and the topological classification of 2D and 3D imagery 

      Allili, Madjid; Mischaikow, Konstantin; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2001-10)
      There are a number of tasks in low level vision and image processing that involve computing certain topological characteristics of objects in a given image including connectivity and the number of holes. We combine a new ...
    • Curve Evolution Models for Real-Time Identification with Application to Plasma Etching 

      Berg, Jordan M.; Yezzi, Anthony; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1999-01)
      It is desirable, in constructing an algorithm for real-time control or identification of free surfaces, to avoid representations of the surface requiring mesh refinement at corners or special logic for topological transitions. ...
    • Curve segmentation using directional information, relation to pattern detection 

      Pichon, Eric; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2005-09)
      We propose an extension of the conformal (or geodesic) active contour framework in which the conformal factor depends not only on the position of the curve but also on the direction of its tangent. We describe several ...
    • Deform PF-MT: Particle Filter With Mode Tracker for Tracking Nonaffine Contour Deformations 

      Vaswani, Namrata; Rathi, Yogesh; Yezzi, Anthony; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2010-04)
      We propose algorithms for tracking the boundary contour of a deforming object from an image sequence, when the nonaffine (local) deformation over consecutive frames is large and there is overlapping clutter, occlusions, ...