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Proceedings Paper

Mobile visual object identification: from SIFT-BoF-RANSAC to Sketchprint
Author(s): Sviatoslav Voloshynovskiy; Maurits Diephuis; Taras Holotyak
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Paper Abstract

Mobile object identification based on its visual features find many applications in the interaction with physical objects and security. Discriminative and robust content representation plays a central role in object and content identification. Complex post-processing methods are used to compress descriptors and their geometrical information, aggregate them into more compact and discriminative representations and finally re-rank the results based on the similarity geometries of descriptors. Unfortunately, most of the existing descriptors are not very robust and discriminative once applied to the various contend such as real images, text or noise-like microstructures next to requiring at least 500-1'000 descriptors per image for reliable identification. At the same time, the geometric re-ranking procedures are still too complex to be applied to the numerous candidates obtained from the feature similarity based search only. This restricts that list of candidates to be less than 1'000 which obviously causes a higher probability of miss. In addition, the security and privacy of content representation has become a hot research topic in multimedia and security communities. In this paper, we introduce a new framework for non- local content representation based on SketchPrint descriptors. It extends the properties of local descriptors to a more informative and discriminative, yet geometrically invariant content representation. In particular it allows images to be compactly represented by 100 SketchPrint descriptors without being fully dependent on re-ranking methods. We consider several use cases, applying SketchPrint descriptors to natural images, text documents, packages and micro-structures and compare them with the traditional local descriptors.

Paper Details

Date Published: 4 March 2015
PDF: 15 pages
Proc. SPIE 9409, Media Watermarking, Security, and Forensics 2015, 94090Q (4 March 2015); doi: 10.1117/12.2079984
Show Author Affiliations
Sviatoslav Voloshynovskiy, Univ. de Genève (Switzerland)
Maurits Diephuis, Univ. de Genève (Switzerland)
Taras Holotyak, Univ. de Genève (Switzerland)

Published in SPIE Proceedings Vol. 9409:
Media Watermarking, Security, and Forensics 2015
Adnan M. Alattar; Nasir D. Memon; Chad D. Heitzenrater, Editor(s)

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