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IEICE TRANSACTIONS on Information

Privacy Protection for Social Video via Background Estimation and CRF-Based Videographer's Intention Modeling

Yuta NAKASHIMA, Noboru BABAGUCHI, Jianping FAN

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Summary :

The recent popularization of social network services (SNSs), such as YouTube, Dailymotion, and Facebook, enables people to easily publish their personal videos taken with mobile cameras. However, at the same time, such popularity has raised a new problem: video privacy. In such social videos, the privacy of people, i.e., their appearances, must be protected, but naively obscuring all people might spoil the video content. To address this problem, we focus on videographers' capture intentions. In a social video, some persons are usually essential for the video content. They are intentionally captured by the videographers, called intentionally captured persons (ICPs), and the others are accidentally framed-in (non-ICPs). Videos containing the appearances of the non-ICPs might violate their privacy. In this paper, we developed a system called BEPS, which adopts a novel conditional random field (CRF)-based method for ICP detection, as well as a novel approach to obscure non-ICPs and preserve ICPs using background estimation. BEPS reduces the burden of manually obscuring the appearances of the non-ICPs before uploading the video to SNSs. Compared with conventional systems, the following are the main advantages of BEPS: (i) it maintains the video content, and (ii) it is immune to the failure of person detection; false positives in person detection do not violate privacy. Our experimental results successfully validated these two advantages.

Publication
IEICE TRANSACTIONS on Information Vol.E99-D No.4 pp.1221-1233
Publication Date
2016/04/01
Publicized
2016/01/13
Online ISSN
1745-1361
DOI
10.1587/transinf.2015EDP7378
Type of Manuscript
PAPER
Category
Image Recognition, Computer Vision

Authors

Yuta NAKASHIMA
  Nara Institute of Science and Technology
Noboru BABAGUCHI
  Osaka University
Jianping FAN
  University of North Carolina

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