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The medial axis, also known as symmetry axis, is a special type of skeleton that has a number of interesting properties. It is a powerful tool in applications involving pattern recognition, image analysis, path planning and mesh generation, to name a few. Since the proposal and definition of the medial axis, in 1967, much effort has been done to develop fast and accurate methods for calculating the...
This paper presents a comparative study between scale, rotation and translation invariant descriptors for shape representation and retrieval. Specifically, we studied Fourier, angular radial transform and image moment descriptors for shape representation. Since shape is one of the most widely used image feature exploited in content-based image retrieval systems, we studied for each descriptor, the...
Shape description and recognition is an important and interesting problem in scene analysis. Our approach to shape description is a formal model of a shape consisting of a set of primitives, their properties, and their interrelationships. The primitives are the simple parts and intrusions of the shape which can be derived through the graph-theoretic clustering procedure described in [31]. The interrelationships...
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