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Proceedings Paper

Vessel classification in overhead satellite imagery using weighted "bag of visual words"
Author(s): Shibin Parameswaran; Katie Rainey
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Paper Abstract

Vessel type classification in maritime imagery is a challenging problem and has applications to many military and surveillance applications. The ability to classify a vessel correctly varies significantly depending on its appearance which in turn is affected by external factors such as lighting or weather conditions, viewing geometry and sea state. The difficulty in classifying vessels also varies among different ship types as some types of vessels show more within-class variation than others. In our previous work, we showed that the bag of visual words" (V-BoW) was an effective feature representation for this classification task in the maritime domain. The V-BoW feature representation is analogous to the bag of words" (BoW) representation used in information retrieval (IR) application in text or natural language processing (NLP) domain. It has been shown in the textual IR applications that the performance of the BoW feature representation can be improved significantly by applying appropriate term-weighting such as log term frequency, inverse document frequency etc. Given the close correspondence between textual BoW (T-BoW) and V-BoW feature representations, we propose to apply several well-known term weighting schemes from the text IR domain on V-BoW feature representation to increase its ability to discriminate between ship types.

Paper Details

Date Published: 22 May 2015
PDF: 7 pages
Proc. SPIE 9476, Automatic Target Recognition XXV, 947609 (22 May 2015); doi: 10.1117/12.2177779
Show Author Affiliations
Shibin Parameswaran, Space and Naval Warfare Systems Ctr. Pacific (United States)
Katie Rainey, Space and Naval Warfare Systems Ctr. Pacific (United States)

Published in SPIE Proceedings Vol. 9476:
Automatic Target Recognition XXV
Firooz A. Sadjadi; Abhijit Mahalanobis, Editor(s)

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