Results 211 to 220 of about 20,905 (259)
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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.
Nafiz Arica, Fatos T. Yarman-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.
Nafiz Arica, Fatos T. Yarman-Vural
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Optometry and Vision Science, 1998
ABSTRACT: With the advent of videokeratoscopy and similar technology, we are now provided with more information about corneal contour than ever before. One of the common problems in this area is which parameters should be used to quantify the corneal shape.
Lindsay, Richard +2 more
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ABSTRACT: With the advent of videokeratoscopy and similar technology, we are now provided with more information about corneal contour than ever before. One of the common problems in this area is which parameters should be used to quantify the corneal shape.
Lindsay, Richard +2 more
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Novelty Search for Shape Descriptors
2020 IEEE Congress on Evolutionary Computation (CEC), 2020In nature, the exploration of a design space is achieved by evolution. However, using artificial evolution to evolve physical shapes has been challenging because both the mapping from the genotype to phenotype and the means of measuring the resulting shape to estimate fitness are not straightforward. This contribution brings together recent advances in
Simon J. Hickinbotham +5 more
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Evaluation of MPEG-7 shape descriptors against other shape descriptors
Multimedia Systems, 2003Shape is an important image feature-it is one of the primary low level image features exploited in content-based image retrieval (CBIR). There are generally two types of shape descriptors in the literature: contour-based and region-based. In MPEG-7, the curvature scale space descriptor (CSSD) and Zernike moment descriptor (ZMD) have been adopted as the
Dengsheng Zhang, Guojun Lu
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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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2015 IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2015
Shape descriptor is a concise yet informative representation that provides a 3D object with an identification as a member of some category. We have developed a concise deep shape descriptor to address challenging issues from ever-growing 3D datasets in areas as diverse as engineering, medicine, and biology.
Yi Fang 0006 +6 more
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Shape descriptor is a concise yet informative representation that provides a 3D object with an identification as a member of some category. We have developed a concise deep shape descriptor to address challenging issues from ever-growing 3D datasets in areas as diverse as engineering, medicine, and biology.
Yi Fang 0006 +6 more
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CONNECTIVITY-BASED SHAPE DESCRIPTORS
International Journal of Computers and Applications, 2010AbstractIn this paper, we propose a method for indexing and retrieval of images based on shapes of objects. The concept of connectivity is introduced. 3D models are used to represent 2D images. 2D images are decomposed a priori using connectivity which is followed by 3D model construction.
A. Sajjanhar, G. Lu, D.S. Zhang, W. Zhou
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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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Gradient-based shape descriptors
Machine Vision and Applications, 2008This paper presents two shape descriptors which could be applied to both binary and grayscale images. The proposed algorithm utilizes gradient based features which are extracted along the object boundaries. We use two-dimensional steerable G-Filters (IEEE Trans Pattern Anal Mach Intell 19(6):545–563, 1997) to obtain gradient information at different ...
Abdulkerim Çapar +2 more
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Weighted -shape: a descriptor of the shape of a point set
Pattern Recognition, 2001Abstract In this article, we present an extension of the concept A -shape to weighted points, where each point's weight is the radius of a disc centered at this point. We also show that the resultant concept, which we name weighted A -shape, is a graph extracted from the regular triangulation.
Mahmoud Melkemi, Mourad Djebali
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