A new chain-coding algorithm for binary images using run-length codes
Computer Vision, Graphics, and Image Processing
Geometric invariance in computer vision
Geometric invariance in computer vision
Pattern Recognition Letters
Variational methods in image segmentation
Variational methods in image segmentation
Shape characterization with the wavelet transform
Signal Processing
Recognizing Planar Objects Using Invariant Image Features
Recognizing Planar Objects Using Invariant Image Features
Robust Tracking Control of Robot Manipulators
Robust Tracking Control of Robot Manipulators
Locating Perceptually Salient Points on Planar Curves
IEEE Transactions on Pattern Analysis and Machine Intelligence
Geometric Invariants for Rational Polynomial Cameras
AIPR '00 Proceedings of the 29th Applied Imagery Pattern Recognition Workshop
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In this Letter, 2-D shape recognition is done using a combination of recursive search of landmarks, landmark-based invariant features, and a fuzzy ART neural-network classifier. To make this novel combination work well, an upper limit is imposed on the number of total landmarks allowed, and this maximum size is then translated into fixed dimensions of invariant features and into the neural processing of the features. It is shown that the recursive landmark search approximates very well any smooth 2-D shape contour, that the shape features used are independent of perspective transformation, and that, when combinedwitha fuzzy ART classifier, unknown features can be efficiently learned on-line to identify multiple distinct objects. An illustrative example is used to demonstrate effectiveness of the proposed algorithm.