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Recognition of geons by parametric deformable contour models
1996This paper presents a novel approach to the detection and recognition of qualitative parts like geons from real 2D intensity images. Previous works relied on semi-local properties of either line drawings or good region segmentation. Here, in the framework of Model-Based Optimisation, whole geons or substantial sub-parts are recognised by fitting ...
Maurizio Pilu, Robert B. Fisher
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Convergence analysis of multidimensional parametric deformable models
Computer Vision and Image Understanding, 2015Display Omitted Multidimensional parametric deformable models are formulated in the Fourier domain.The convergence of these models is also analyzed in the frequency domain.The eigenvalues of each spectral component of the system rule its convergence speed.The parameters of the iterative system can be optimized by using these eigenvalues.This process ...
Rafael Berenguer-Vidal +2 more
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Parametric estimation of affine deformations of binary images
2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008We consider the problem of planar object registration on binary images where the aligning transformation is restricted to the group of affine transformations. Previous approaches usually require established correspondences or the solution of nonlinear optimization problems.
Csaba Domokos +2 more
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Frequency domain formulation of active parametric deformable models
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2004Active deformable models are simple tools, very popular in computer vision and computer graphics, for solving ill-posed problems or mimic real physical systems. The classical formulation is given in the spatial domain, the motor of the procedure is a second-order linear system, and rigidity and elasticity are the basic parameters for its ...
Luis Weruaga +2 more
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A fast parametric deformation mechanism for virtual reality applications
Computers and Industrial Engineering, 2009Virtual reality technologies have been adopted in a wide variety of applications for its interactive ability and realistic senses. Despite early implementations regard VR only as a medium for lively animation; a practical VR work must deliver precise deformation on virtual objects based on real-time interactions.
Cheng Tzong-Ming, Tsung-Han Tu
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Parametric excitation of bending deformations of a rod by periodic twist
Physical Review E, 2013A model of a semiflexible magnetic filament with magnetization frozen in the direction perpendicular to the tangent of its center line is formulated. It is shown that if the rod is magnetized at its ends in opposite directions, an AC magnetic field causes parametric excitation of bending deformations.
M, Belovs, A, Cēbers
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A new steerable pressure force for parametric deformable models
SPIE Proceedings, 2011Active contour models have been widely used in various image analysis applications. Despite their usefulness, there are problems limiting their utility, such as capture range, concavity conformation, and convergence rate. This paper presents a new pressure-like force that not only improves contour convergence rate, but also encourages contours to ...
Jun Kong 0002 +5 more
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A hierarchical parametric algorithm for deformable multimodal image registration
Computer Methods and Programs in Biomedicine, 2004Image fusion is of utmost importance for many applications in image analysis. Particularly in medical imaging, images of different modalities are necessary because they provide complementary information that must be merged for an optimal use. The fusion of these images, which can be achieved through a registration process, makes it possible to ...
Hellier, Pierre, Barillot, Christian
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Deformation resistance in soft tissue cutting: a parametric study
12th International Symposium on Haptic Interfaces for Virtual Environment and Teleoperator Systems, 2004. HAPTICS '04. Proceedings., 2004Characterizing and modeling of soft tissue deformation during cutting is important for developing a reality based haptic interaction model for surgical training and simulation. In this study, soft tissue cutting experiments were performed (ex-vivo) while monitoring the cutting forces and blade displacement for various cutting speeds (ranging from 0.1cm/
Teeranoot Chanthasopeephan +2 more
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Deformations of general parametric shells: Computation and robot experiment
2008 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2008A shell is a body enclosed between two closely spaced and curved surfaces. Classical theory of shells (Timoshenko and Woinowsky-Krieger, 1959; Saada, 1993; and Gould, 1999) assumes a parametrization along the lines of principal curvature on the middle surface of a shell.
Yan-Bin Jia, Jiang Tian
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