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Proceedings Paper

Automatic segmentation of low-visibility moving objects through energy analyis of the local 3D spectrum
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Paper Abstract

Automatic object segmentation in highly noisy image sequences, composed by a translating object over a background having a different motion, is achieved through joint motion-texture analysis. Local motion and/or texture is characterized by the energy of the local spatio-temporal spectrum, as different textures undergoing different translational motions display distinctive features in their 3D (x,y,t) spectra. Measurements of local spectrum energy are obtained using a bank of directional 3rd order Gaussian derivative filters in a multiresolution pyramid in space- time (10 directions, 3 resolution levels). These 30 energy measurements form a feature vector describing texture-motion for every pixel in the sequence. To improve discrimination capability and reduce computational cost, we automatically select those 4 features (channels) that best discriminate object from background, under the assumptions that the object is smaller than the background and has a different velocity or texture. In this way we reject features irrelevant or dominated by noise, that could yield wrong segmentation results. This method has been successfully applied to sequences with extremely low visibility and for objects that are even invisible for the eye in absence of motion.

Paper Details

Date Published: 17 May 1999
PDF: 10 pages
Proc. SPIE 3642, High-Speed Imaging and Sequence Analysis, (17 May 1999); doi: 10.1117/12.348422
Show Author Affiliations
Oscar Nestares, SENER Ingenieria y Sistemas, S.A. (Spain)
Carlos Miravet, SENER Ingenieria y Sistemas, S.A. (Spain)
Javier Santamaria, SENER Ingenieria y Sistemas, S.A. (Spain)
Rafael Fonolla Navarro, Instituto de Optica (Spain)

Published in SPIE Proceedings Vol. 3642:
High-Speed Imaging and Sequence Analysis
Alan M. Frank; Alan M. Frank; James S. Walton, Editor(s)

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