Scale-Based Description and Recognition of Planar Curves and Two-Dimensional Shapes
IEEE Transactions on Pattern Analysis and Machine Intelligence
An improved corner detection algorithm based on chain-coded plane curves
Pattern Recognition
On the Detection of Dominant Points on Digital Curves
IEEE Transactions on Pattern Analysis and Machine Intelligence
Pattern Recognition
Pattern Recognition Letters
Generalized Affine Invariant Image Normalization
IEEE Transactions on Pattern Analysis and Machine Intelligence
IEEE Transactions on Pattern Analysis and Machine Intelligence
Pattern Recognition Letters
Merging and Splitting Eigenspace Models
IEEE Transactions on Pattern Analysis and Machine Intelligence
Mean Shift: A Robust Approach Toward Feature Space Analysis
IEEE Transactions on Pattern Analysis and Machine Intelligence
BAS: a perceptual shape descriptor based on the beam angle statistics
Pattern Recognition Letters
Candid Covariance-Free Incremental Principal Component Analysis
IEEE Transactions on Pattern Analysis and Machine Intelligence
A Complete and Stable Set of Affine-Invariant Fourier Descriptors
ICIAP '03 Proceedings of the 12th International Conference on Image Analysis and Processing
Nonparametric discriminant analysis and nearest neighbor classification
Pattern Recognition Letters
A Generic Methodology for Partitioning Unorganised 3D Point Clouds for Robotic Vision
CRV '04 Proceedings of the 1st Canadian Conference on Computer and Robot Vision
A new shape descriptor defined on the radon transform
Computer Vision and Image Understanding
Tree Trunks as Landmarks for Outdoor Vision SLAM
CVPRW '06 Proceedings of the 2006 Conference on Computer Vision and Pattern Recognition Workshop
Generalized affine moment invariants for object recogn
ICPR '06 Proceedings of the 18th International Conference on Pattern Recognition - Volume 02
Shape retrieval using triangle-area representation and dynamic space warping
Pattern Recognition
Algorithms for Shape Analysis of Contours and Waveforms
IEEE Transactions on Pattern Analysis and Machine Intelligence
Incremental linear discriminant analysis for classification of data streams
IEEE Transactions on Systems, Man, and Cybernetics, Part B: Cybernetics
A multiscale representation method for nonrigid shapes with a single closed contour
IEEE Transactions on Circuits and Systems for Video Technology
Using diagonals of orthogonal projection matrices for affine invariant contour matching
Image and Vision Computing
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In this paper, a planar shape recognition system is proposed. This proposal is based on a global incremental scheme which combines two learning mechanisms: the Incremental Non-parametric Discriminant Analysis and the mode analysis method. At the feature selection stage, a novel adaptive curvature estimator for shape characterization is presented. This method describes the planar shape using an affine-invariant triangle-area representation obtained from its closed contour. Contrary to previous approaches, the triangle side lengths at each contour point are adapted to the local variations of the shape, removing noise from the contour without missing relevant points. In order to reduce the dimensionality of the shape descriptor, an Incremental Non-parametric Discriminant Analysis is conducted to seek directions for efficient discrimination (incremental eigenspace learning). At the classification stage, the incremental mode analysis is employed to classify feature vectors into a set of spherically-shaped groups (incremental prototype learning). The classification is conducted based on the k-nearest neighbor approach whose prototypes are updated by the mode analysis method. This scheme enables a classifier to learn incrementally, on-line, and in one-pass. Experimental results show that the proposed shape recognition system is well suited for shape indexing and retrieval.