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Optical Engineering

Position-, rotation-, scale-, and orientation-invariant multiple object recognition from cluttered scenes
Author(s): Peter Bone; Rupert C. D. Young; Christopher R. Chatwin
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Paper Abstract

A method of detecting target objects in still images despite any kind of geometrical distortion is demonstrated. Two existing techniques are combined, each one capable of creating invariance to various types of distortion of the target object. A maximum average correlation height (MACH) filter is used to create invariance to orientation and gives good tolerance to background clutter and noise. A log r-θ mapping is employed to give invariance to in-plane rotation and scale by transforming rotation and scale variations of the target object into vertical and horizontal shifts. The MACH filter is trained on the log r-θ map of the target for a range of orientations and applied sequentially over regions of interest in the input image. Areas producing a strong correlation response can then be used to determine the position, in-plane rotation, and scale of the target objects in the scene.

Paper Details

Date Published: 1 July 2006
PDF: 8 pages
Opt. Eng. 45(7) 077203 doi: 10.1117/1.2227362
Published in: Optical Engineering Volume 45, Issue 7
Show Author Affiliations
Peter Bone, Univ. of Sussex at Brighton (United Kingdom)
Rupert C. D. Young, Univ. of Sussex (United Kingdom)
Christopher R. Chatwin, Univ. of Sussex at Brighton (United Kingdom)

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