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Computer Vision, Graphics, and Image Processing, 1986
A new fast shape descriptor, based upon the rapid transformation of Reitboeck and Brody, is presented. The normalized rapid descriptors (NRD) developed here and normalized Fourier descriptors (NFD) are applied to the analyses of some typical 2D images. It is shown that they both have good recognition performance.
Ma Jun, Wu Chengke, Lu Xinru
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A new fast shape descriptor, based upon the rapid transformation of Reitboeck and Brody, is presented. The normalized rapid descriptors (NRD) developed here and normalized Fourier descriptors (NFD) are applied to the analyses of some typical 2D images. It is shown that they both have good recognition performance.
Ma Jun, Wu Chengke, Lu Xinru
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Three-Dimensional Shape Analysis Using Local Shape Descriptors
IEEE Transactions on Pattern Analysis and Machine Intelligence, 1981The three-dimensional shape analysis problem is a very demanding test of shape analysis algorithms. Previous approaches to the problem have employed global features such as moments and Fourier descriptors. Global features lack the capacity for solving the partial shape recognition problem, in which only part of the unknown shape is available.
T P, Wallace, O R, Mitchell, K, Fukunaga
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QSAR & Combinatorial Science, 2006
AbstractWHIM descriptors are 3D structural descriptors obtained from the (x,y,z)‐atomic coordinates of a molecular conformation of a chemical, and are used successfully in QSAR modelling. They are built in so as to capture relevant 3D information regarding different features of molecular structure: size, shape, symmetry and atom distribution. Different
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AbstractWHIM descriptors are 3D structural descriptors obtained from the (x,y,z)‐atomic coordinates of a molecular conformation of a chemical, and are used successfully in QSAR modelling. They are built in so as to capture relevant 3D information regarding different features of molecular structure: size, shape, symmetry and atom distribution. Different
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Invariant local shape descriptors
Proceedings of the Computer Graphics International Conference, 2017We present a novel statistical shape descriptor for arbitrary three-dimensional shapes as a six-dimensional feature for generic classification purposes. Our feature parameterizes the complete geo-metrical relation of the global shape and additionally considers local dissimilarities while being invariant to the shape appearance.
Xizhi Li +3 more
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2013
Fourier descriptors are an interesting method for modeling 2D shapes that are described as closed contours. Unlike polylines or splines, which are explicit and local descriptions of the contour, Fourier descriptors are global shape representations, that is, each component stands for a particular characteristic of the entire shape.
Wilhelm Burger, Mark J. Burge
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Fourier descriptors are an interesting method for modeling 2D shapes that are described as closed contours. Unlike polylines or splines, which are explicit and local descriptions of the contour, Fourier descriptors are global shape representations, that is, each component stands for a particular characteristic of the entire shape.
Wilhelm Burger, Mark J. Burge
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Comparing local shape descriptors
The Visual Computer, 2012Local shape descriptors can be used for a variety of tasks, from registration to comparison to shape analysis and retrieval. There have been a variety of local shape descriptors developed for these tasks, which have been evaluated in isolation or in pairs, but not against each other.
Paul Heider +4 more
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1983
This section reviews the molecular shape descriptors developed by Amoore, Allinger, Simon et al. and Testa and Purcell. The illustrative examples discussed refer to the odour similarity and cardiotoxic aglycones. One has stressed the methods based on the reference structure because, correctly formulated, these methods seem to offer promising ...
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This section reviews the molecular shape descriptors developed by Amoore, Allinger, Simon et al. and Testa and Purcell. The illustrative examples discussed refer to the odour similarity and cardiotoxic aglycones. One has stressed the methods based on the reference structure because, correctly formulated, these methods seem to offer promising ...
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Object recognition supported by user interaction for service robots, 2003
We represent a two dimensional object silhouette by a one dimensional descriptor, which preserves the perceptual structure of its shape. The proposed descriptor is based on the moments of the angles between the bearings of a point on the boundary, in a set of neighborhood systems.
N. Arica, F.T.Y. Vural
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We represent a two dimensional object silhouette by a one dimensional descriptor, which preserves the perceptual structure of its shape. The proposed descriptor is based on the moments of the angles between the bearings of a point on the boundary, in a set of neighborhood systems.
N. Arica, F.T.Y. Vural
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IEEE Signal Processing Letters, 2009
In this letter, we proposed two new affine invariant region-based shape descriptors, the ICA Zernike moment shape descriptor (ICAZMSD) and the whitening Zernike moment shape descriptor (WZMSD). Either independent component analysis (ICA) or whitening, is first used to turn the original shape into a canonical form, in which the effects of scaling and ...
null Ye Mei, D. Androutsos
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In this letter, we proposed two new affine invariant region-based shape descriptors, the ICA Zernike moment shape descriptor (ICAZMSD) and the whitening Zernike moment shape descriptor (WZMSD). Either independent component analysis (ICA) or whitening, is first used to turn the original shape into a canonical form, in which the effects of scaling and ...
null Ye Mei, D. Androutsos
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Walsh descriptors for shape discrimination
International Journal of Electronics, 1980A shift invariant Walsh power spectrum for real periodic signals is defined, and an algorithm for its computation is presented. The Walsh power spectrum of the boundary angular function φ∗ of Zahn and Roskies (1972) is computed. It is shown that most of the energy of the power spectrum is concentrated in the lower sequency coefficients.
I. DINSTEIN, T. SILBERBERG
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