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The image ray transform for structural feature detection
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DOI：10.1016/j.patrec.2011.08.020.png)
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摘要
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The use of analogies to physical phenomena is an exciting paradigm in computer vision that allows unorthodox approaches to feature extraction, creating new techniques with unique properties. A technique known as the image ray transform has been developed based upon an analogy to the propagation of light as rays. The transform analogises an image to a set of glass blocks with refractive index linked to pixel properties and then casts a large number of rays through the image. The course of these rays is accumulated into an output image. The technique can successfully extract tubular and circular features and we show successful circle detection, ear biometrics and retinal vessel extraction. The transform has also been extended through the use of multiple rays arranged as a beam to increase robustness to noise, and we show quantitative results for fully automatic ear recognition, achieving 95.2% rank one recognition across 63 subjects. (C) 2011 Elsevier B.V. All rights reserved.
Keyword:
Vision
Feature extraction
Circle detection
Biometrics
Medical imaging
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