Exposing photo manipulation with inconsistent perspective geometry

doi:10.1016/S1005-8885(14)60320-4

Acta Metallurgica Sinica(English letters) ›› 2014, Vol. 21 ›› Issue (4): 83-91.doi: 10.1016/S1005-8885(14)60320-4

Exposing photo manipulation with inconsistent perspective geometry

李岩¹,周亚建²,袁开国¹,郭玉翠钮心忻⁴

Information Security Center, Beijing University of Posts and Telecommunications, Beijing 100876, China

收稿日期:2013-12-27 修回日期:2014-05-19 出版日期:2014-08-31 发布日期:2014-08-30
通讯作者: 李岩 E-mail:liyanphoto@gmail.com
基金资助:
新闻出版重大科技工程项目;中央高校基本科研业务费专项资金;中国国家自然科学基金

Exposing photo manipulation with inconsistent perspective geometry

Information Security Center, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2013-12-27 Revised:2014-05-19 Online:2014-08-31 Published:2014-08-30
Contact: Yan LI E-mail:liyanphoto@gmail.com
Supported by:
General Administration of Press and Publication of the People's Republic of China;fundamental research funds for the Central Universities

摘要/Abstract

摘要： Manipulated digital image is got interesting in recent years. Digital images can be manipulated more easily with the aid of powerful image editing software. Forensic techniques for authenticating the integrity of digital images and exposing forgeries are urgently needed. A geometric-based forensic technique which exploits the principle of vanishing points is proposed. By means of edge detection and straight lines extraction, intersection points of the projected parallel lines are computed. The normalized mean value (NMV) and normalized standard deviation (NSD) of the distances between the intersection points are used as evidence for image forensics. The proposed method employs basic rules of linear perspective projection, and makes minimal assumption. The only requirement is that the parallel lines are contained in the image. Unlike other forensic techniques which are based on low-level statistics, this method is less sensitive to image operations that do not alter image content, such as image resampling, color manipulation, and lossy compression. This method is demonstrated with images from York Urban database. It shows that the proposed method has a definite advantage at separating authentic and forged images.

关键词: digital images, forgery detection, image forensics, vanishing points

Abstract: Manipulated digital image is got interesting in recent years. Digital images can be manipulated more easily with the aid of powerful image editing software. Forensic techniques for authenticating the integrity of digital images and exposing forgeries are urgently needed. A geometric-based forensic technique which exploits the principle of vanishing points is proposed. By means of edge detection and straight lines extraction, intersection points of the projected parallel lines are computed. The normalized mean value (NMV) and normalized standard deviation (NSD) of the distances between the intersection points are used as evidence for image forensics. The proposed method employs basic rules of linear perspective projection, and makes minimal assumption. The only requirement is that the parallel lines are contained in the image. Unlike other forensic techniques which are based on low-level statistics, this method is less sensitive to image operations that do not alter image content, such as image resampling, color manipulation, and lossy compression. This method is demonstrated with images from York Urban database. It shows that the proposed method has a definite advantage at separating authentic and forged images.

Key words: digital images, forgery detection, image forensics, vanishing points

中图分类号:

TP391.4

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Exposing photo manipulation with inconsistent perspective geometry

Exposing photo manipulation with inconsistent perspective geometry

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