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Review of shape representation and description techniques
, 2004
"... More and more images have been generated in digital form around the world. There is a growing interest in finding images in large collections or from remote databases. In order to nd an image, the image has to be described or represented by certain features. Shape is an important visual feature of a ..."
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Cited by 277 (4 self)
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of an image. Searching for images using shape features has attracted much attention. There are many shape representation and description techniques in the literature. In this paper, we classify and review these important techniques. We examine implementation procedures for each technique and discuss its
Shape Representation and
, 1992
"... this paper we propose an approach that attempts to solve this conflict by using the duality in a way similar to the approach. Several psychophysical experiments have proved that the hu- man eye is able to capture the main shape of an object by seeing only a few characteristic elements or features. ..."
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this paper we propose an approach that attempts to solve this conflict by using the duality in a way similar to the approach. Several psychophysical experiments have proved that the hu- man eye is able to capture the main shape of an object by seeing only a few characteristic elements or features
Geometric structures for threedimensional shape representation
- ACM Trans. Graph
, 1984
"... Different geometric structures are investigated in the context of discrete surface representation. It is shown that minimal representations (i.e., polyhedra) can be provided by a surface-based method using nearest neighbors structures or by a volume-based method using the Delaunay triangulation. Bot ..."
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Cited by 194 (5 self)
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Different geometric structures are investigated in the context of discrete surface representation. It is shown that minimal representations (i.e., polyhedra) can be provided by a surface-based method using nearest neighbors structures or by a volume-based method using the Delaunay triangulation
Qualitative Shape Representation
- IN
, 1994
"... Boundaries are closely related to shape and it is in the context of shape representation that the problem of undetermined boundaries appears in spatial reasoning. Shape indeterminacy may occur at different levels of abstraction, namely at the topological and the geometrical level. It shows that ther ..."
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Cited by 13 (0 self)
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Boundaries are closely related to shape and it is in the context of shape representation that the problem of undetermined boundaries appears in spatial reasoning. Shape indeterminacy may occur at different levels of abstraction, namely at the topological and the geometrical level. It shows
Shape representation by metric interpolation
"... Abstract—Coordinates of vertices in a triangulated surface can be efficiently represented as a set of coefficients that multiply a given basis of functions. One such natural orthonormal basis is provided by the eigenfunctions of the Laplace-Beltrami operator of a given shape. The coefficients in thi ..."
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in this case are nothing but the result of the scalar inner product of the coordinates treated as a smooth function on the surface of the shape and the eigenfunctions that form the orthonormal basis. Keeping only the significant coefficients allows for efficient representation of a given shape under practical
Planar Shape Representation Based on
"... A technique is presented to construct a multiscale representation of planar contours based on the multiwavelet transform (MWT). To generate this multiwavelet description, a partial 1-D discrete multiwavelet transform (DMWT) is applied to the vertical and horizontal components of a length-parametrize ..."
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objects are well represented by a small number of multiwavelet coefficients allowing for a compact object shape representation.
Shape representations and evolution schemes
- Proceedings of the 5th Annual Conference on Evolutionary Programming
, 1996
"... The choice of a representation i.e. the definition of the search space, is of vital importance in all Evolutionary Optimization processes. In the context of Topological Optimum Design in Structural Mechanics, this paper investigates possible representations for evolutionary shape design. ..."
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Cited by 20 (5 self)
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The choice of a representation i.e. the definition of the search space, is of vital importance in all Evolutionary Optimization processes. In the context of Topological Optimum Design in Structural Mechanics, this paper investigates possible representations for evolutionary shape design.
Modeling the Shape of the Scene: A Holistic Representation of the Spatial Envelope
- International Journal of Computer Vision
, 2001
"... In this paper, we propose a computational model of the recognition of real world scenes that bypasses the segmentation and the processing of individual objects or regions. The procedure is based on a very low dimensional representation of the scene, that we term the Spatial Envelope. We propose a se ..."
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Cited by 1313 (81 self)
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In this paper, we propose a computational model of the recognition of real world scenes that bypasses the segmentation and the processing of individual objects or regions. The procedure is based on a very low dimensional representation of the scene, that we term the Spatial Envelope. We propose a
Detailed shape representation with parallax mapping
- In Proceedings of the ICAT 2001
, 2001
"... Although texture mapping is a common technique for adding apparent surface detail to 3-D objects, it lacks the capability to represent the motion parallax effect. So the mesh to which it is applied limits its realism. In this paper, we propose Parallax Mapping, a simple method to motion parallax eff ..."
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Cited by 33 (0 self)
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effects on a polygon. This method has very fast per-pixel shape representation and can be performed in real-time with current hardware.
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