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A Mobile Vision Service for Multimedia Tourist Applications in Urban Environments

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5 Author(s)
Paletta, L. ; Inst. of Digital Image Process., Forschungsgesellschaft mbH, Graz ; Fritz, G. ; Seifert, C. ; Luley, P.
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We present a computer vision system for the detection and identification of urban objects from mobile phone imagery, e.g., for the application of tourist information services. Recognition is based on MAP decision making over weak object hypotheses from local descriptor responses in the mobile imagery. We present an improvement over the standard SIFT key detector (Lowe, 2004) by selecting only informative (i-SIFT) keys for descriptor matching. Selection is applied first to reduce the complexity of the object model and second to accelerate detection by selective filtering. We present results on the MPG-20 mobile phone imagery with severe illumination, scale and viewpoint changes in the images, performing with p ap 98% accuracy in identification, efficient (100%) background rejection, efficient (0%) false alarm rate, and reliable quality of service under extreme illumination conditions, significantly improving standard SIFT based recognition in every sense, providing mportant for mobile vision - runtimes which are ap 8 (ap 24) times faster for the MPG-20 (ZuBuD) database

Published in:

Intelligent Transportation Systems Conference, 2006. ITSC '06. IEEE

Date of Conference:

17-20 Sept. 2006

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