Building hierarchical vision model of objects with multiple representations

Bir Bhanu; Chih-Cheng Ho

doi:10.1117/12.58610

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1 March 1992 Building hierarchical vision model of objects with multiple representations

Bir Bhanu; Chih-Cheng Ho

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Proceedings Volume 1708, Applications of Artificial Intelligence X: Machine Vision and Robotics; (1992) https://doi.org/10.1117/12.58610
Event: Aerospace Sensing, 1992, Orlando, FL, United States

Abstract

Building a hierarchical vision model of an object with multiple representations requires two steps: (1) decomposing the object into parts/subparts and obtaining appropriate representations, and (2) constructing relational links between decomposed parts/subparts obtained in step 1. In this paper, we describe volume-based decomposition and surface-based decomposition of 3-D objects into parts, where the objects are designed by a B-spline based geometric modeler called Alpha-1. Multiple-representation descriptions can be derived for each of these subparts using various techniques such as polygonal approximation, concave/convex edge detection, curvature extrema, and surface normals. For example, subparts of a hammer can be described by two generalized cylinders or one generalized cylinder and one polyhedron. Several examples are presented.

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Bir Bhanu and Chih-Cheng Ho "Building hierarchical vision model of objects with multiple representations", Proc. SPIE 1708, Applications of Artificial Intelligence X: Machine Vision and Robotics, (1 March 1992); https://doi.org/10.1117/12.58610