VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Multi-object image retrieval based on shape and topology
Image Communication
Shape retrieval using triangle-area representation and dynamic space warping
Pattern Recognition
Structure-oriented contour representation and matching for engineering shapes
Computer-Aided Design
A Unified Curvature Definition for Regular, Polygonal, and Digital Planar Curves
International Journal of Computer Vision
Curvature Feature Based Shape Analysis
ICIC '08 Proceedings of the 4th international conference on Intelligent Computing: Advanced Intelligent Computing Theories and Applications - with Aspects of Theoretical and Methodological Issues
Shape representation and description using the Hilbert curve
Pattern Recognition Letters
The VLDB Journal — The International Journal on Very Large Data Bases
An Adaptive Approach for Affine-Invariant 2D Shape Description
IbPRIA '09 Proceedings of the 4th Iberian Conference on Pattern Recognition and Image Analysis
Farthest point distance: A new shape signature for Fourier descriptors
Image Communication
Affine-invariant contours recognition using an incremental hybrid learning approach
Pattern Recognition Letters
Kernels for Periodic Time Series Arising in Astronomy
ECML PKDD '09 Proceedings of the European Conference on Machine Learning and Knowledge Discovery in Databases: Part II
Spatio-temporal descriptor using 3D curvature scale space
PReMI'07 Proceedings of the 2nd international conference on Pattern recognition and machine intelligence
Cyclic linear hidden Markov models for shape classification
PSIVT'07 Proceedings of the 2nd Pacific Rim conference on Advances in image and video technology
Content-based 3D object retrieval using 2D views
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
TAR based shape features in unconstrained handwritten digit recognition
WSEAS Transactions on Computers
On the convergence of planar curves under smoothing
IEEE Transactions on Image Processing
Fast shape matching and retrieval based on approximate dynamic space warping
Artificial Life and Robotics
Balancing deformability and discriminability for shape matching
ECCV'10 Proceedings of the 11th European conference on computer vision conference on Computer vision: Part III
From 2D silhouettes to 3D object retrieval: contributions and benchmarking
Journal on Image and Video Processing
Shape representation and matching of 3D objects for computer vision applications
SSIP'05 Proceedings of the 5th WSEAS international conference on Signal, speech and image processing
Scale invariant and deformation tolerant partial shape matching
Image and Vision Computing
Shape classification via image-based multiscale description
Pattern Recognition
Shape matching and classification using height functions
Pattern Recognition Letters
Hidden markov model based 2d shape classification
ACIVS'05 Proceedings of the 7th international conference on Advanced Concepts for Intelligent Vision Systems
Envelope detection of multi-object shapes
ICIAR'05 Proceedings of the Second international conference on Image Analysis and Recognition
Interactive experiments in object-based retrieval
CIVR'06 Proceedings of the 5th international conference on Image and Video Retrieval
Significantly improving scan-based shape representations using rotational key feature points
ICIAR'10 Proceedings of the 7th international conference on Image Analysis and Recognition - Volume Part I
Shape matching and recognition using group-wised points
PSIVT'11 Proceedings of the 5th Pacific Rim conference on Advances in Image and Video Technology - Volume Part II
Invariant curvature-based Fourier shape descriptors
Journal of Visual Communication and Image Representation
SHREC'09 track: generic shape retrieval
EG 3DOR'09 Proceedings of the 2nd Eurographics conference on 3D Object Retrieval
Shape-based image retrieval using pair-wise candidate co-ranking
ICIAR'07 Proceedings of the 4th international conference on Image Analysis and Recognition
On the dynamic time warping of cyclic sequences for shape retrieval
Image and Vision Computing
SSPR'12/SPR'12 Proceedings of the 2012 Joint IAPR international conference on Structural, Syntactic, and Statistical Pattern Recognition
Densifying Distance Spaces for Shape and Image Retrieval
Journal of Mathematical Imaging and Vision
Perceptually motivated shape context which uses shape interiors
Pattern Recognition
Fast and effective retrieval of plant leaf shapes
ACCV'12 Proceedings of the 11th Asian conference on Computer Vision - Volume Part II
Sketch-based 3D model retrieval by incorporating 2D-3D alignment
Multimedia Tools and Applications
Silhouette-based human action recognition using SAX-Shapes
The Visual Computer: International Journal of Computer Graphics
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In this paper, we discuss the criteria that should be satisfied by a descriptor for nonrigid shapes with a single closed contour. We then propose a shape representation method that fulfills these criteria. In the proposed approach, contour convexities and concavities at different scale levels are represented using a two-dimensional (2-D) matrix. The representation can be visualized as a 2-D surface, where "hills" and "valleys" represent contour convexities and concavities, respectively. The optimal matching of two shape representations is achieved using dynamic programming and a dissimilarity measure is defined based on this matching. The proposed algorithm is very efficient and invariant to several kinds of transformations including some articulations and modest occlusions. The retrieval performance of the approach is illustrated using the MPEG-7 shape database, which is one of the most complete shape databases currently available. Our experiments indicate that the proposed representation is well suited for object indexing and retrieval in large databases. Furthermore, the representation can be used as a starting point to obtain more compact descriptors.