Now showing items 2-21 of 210

    • Active Contours and Optical Flow for Automatic Tracking of Flying Vehicles 

      Ha, Jin-cheol; Alvino, Christopher Vincent; Pryor, Gallagher D.; Niethammer, Marc; Johnson, Eric N.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2004)
      In this paper, we describe fast implementations of optical flow and geometric active contours to reliably track flying vehicles. Given the position of the vehicle at time t-1, optical flow information is used to initially ...
    • Affine Invariant Detection: Edges, Active Contours, and Segments 

      Olver, Peter; Sapiro, Guillermo; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1996-06)
      In this paper we undertake a systematic investigation of affine invariant object detection. Edge detection is first presented from the point of view of the affine invariant scale-space obtained by curvature based motion ...
    • Affine Invariant Erosion of 3D Shapes 

      Betelu, Santiago; Sapiro, Guillermo; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2001-07)
      A new definition of affine invariant erosion of 3D surfaces is introduced. Instead of being based in terms of Euclidean distances, the volumes enclosed between the surface and its chords are used. The resulting erosion is ...
    • Affine Invariant Surface Evolutions for 3D Image Segmentation 

      Rathi, Yogesh; Olver, Peter; Sapiro, Guillermo; Tannenbaum, Allen R. (Georgia Institute of TechnologySociety of Photo-Optical Instrumentation Engineers, 2006-01)
      In this paper we present an algorithm for 3D medical image segmentation based on an affine invariant flow. The algorithm is simple to implement and semi-automatic. The technique is based on active contours evolving in time ...
    • Affine Registration of label maps in Label Space 

      Rathi, Yogesh; Malcolm, James G.; Bouix, Sylvain; Tannenbaum, Allen R.; Shenton, Martha E. (Georgia Institute of TechnologyJournal of Computing, 2010-04)
      Two key aspects of coupled multi-object shape analysis and atlas generation are the choice of representation and subsequent registration methods used to align the sample set. For example, a typical brain image can be labeled ...
    • Agitation and Pain Assessment Using Digital Imaging 

      Gholami, Behnood; Haddad, Wassim M.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2009-09)
      Pain assessment in patients who are unable to verbally communicate with medical staff is a challenging problem in patient critical care. The fundamental limitations in sedation and pain assessment in the intensive care ...
    • Algorithms for stochastic approximations of curvature flows 

      Unal, Gozde; Nain, Delphine; Ben Arous, Gérard; Shimkin, Nahum; Tannenbaum, Allen R.; Zeitouni, Ofer (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2003-09)
      Curvature flows have been extensively considered from a deterministic point of view. They have been shown to be useful for a number of applications including crystal growth, flame propagation, and computer vision. In some ...
    • Analysis and design of anisotropic diffusion for image processing 

      You, Yu-La; Kaveh, Mos; Xu, Wen-Yuan; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1994-11)
      Anisotropic diffusion is posed as a process of minimizing an energy function. Its global convergence behavior is determined by the shape of the energy surface, and its local behavior is described by an orthogonal decomposition ...
    • Analysis of arterial sub-trees affected by Pulmonary Emboli 

      Kiraly, Atilla P.; Pichon, Eric; Naidich, David P.; Novak, Carol L. (Georgia Institute of TechnologySociety of Photo-Optical Instrumentation Engineers, 2004-02)
      Although Pulmonary Embolism (PE) is one of the most common causes of unexpected death in the U.S., it may also be one of the most preventable. Images acquired from 16-slice Computed Tomography (CT) machines of contrast-injected ...
    • Analysis of blood vessel topology by cubical homology 

      Niethammer, Marc; Stein, Andrew Neil; Kalies, W. D.; Pilarczyk, P.; Mischaikow, Konstantin; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2002-09)
      We segment and topologically classify brain vessel data obtained from magnetic resonance angiography (MRA). The segmentation is done adaptively and the classification by means of cubical homology, i.e. the computation of ...
    • Angle-preserving mappings for the visualization of multi-branched vessels 

      Zhu, Lei; Haker, Steven; Tannenbaum, Allen R.; Bouix, Sylvain; Siddiqi, Kaleem (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2002-09)
      We employ a conformal mapping technique to flatten tubular structures with multi-branches for visualization of MRA and CT volumetric vessel imagery. This may be used for the study of possible vessel pathology or virtual ...
    • Area and Length Minimizing Flows for Shape Segmentation 

      Siddiqi, Kaleem; Lauzière, Yves Bérubé; Tannenbaum, Allen R.; Zucker, Steven W. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1997-06)
      Several active contour models have been proposed to unify the curve evolution framework with classical energy minimization techniques for segmentation, such as snakes. The essential idea is to evolve a curve (in 20) or a ...
    • Automatic Segmentation of Coronary Arteries Using Bayesian Driven Implicit Surfaces 

      Yang, Yan; Tannenbaum, Allen R.; Giddens, Don P.; Stillman, Arthur (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2007-04)
      In this paper, we propose a hybrid approach for the automatic three-dimensional segmentation of coronary arteries using multi-scale vessel filtering and a Bayesian probabilistic approach in a level set image segmentation ...
    • Automatic tracking of flying vehicles using geodesic snakes and Kalman filtering 

      Betser, Amir; Vela, Patricio A.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2004-12)
      This paper describes a tracking algorithm relying on active contours for target extraction and an extended Kalman filter for relative pose estimation. This work represents the first step towards treating the general problem ...
    • Behavioral analysis of anisotropic diffusion in image processing 

      You, Yu-Li; Xu, Wenyuan; Tannenbaum, Allen R.; Kaveh, Mostafa (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 1996-11)
      In this paper, we analyze the behavior of the anisotropic diffusion model of Perona and Malik (1990). The main idea is to express the anisotropic diffusion equation as coming from a certain optimization problem, so its ...
    • Blind deconvolution of medical ultrasound images: parametric inverse filtering approach 

      Michailovich, Oleg V.; Tannenbaum, Allen R. (Georgia Institute of TechnologyInstitute of Electrical and Electronics Engineers, 2007-12)
      The problem of reconstruction of ultrasound images by means of blind deconvolution has long been recognized as one of the central problems in medical ultrasound imaging. In this paper, this problem is addressed via proposing ...
    • 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 ...