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Detection and Description of Geometrically Transformed Digital Images
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SYSNO ASEP 0323737 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Detection and Description of Geometrically Transformed Digital Images Title Detekce a popis geometricky transformovaných digitálních obrazů Author(s) Mahdian, Babak (UTIA-B) RID
Saic, Stanislav (UTIA-B)Source Title Media Forensics and Security (Proceedings of Spie). - Washington : SPIE, 2009 - ISSN 0277-786X - ISBN 978-0-8194-7504-6 Pages s. 1-9 Number of pages 9 s. Publication form www - www Action Electronic Imaging Science and Technology Event date 19.01.2009-21.01.2009 VEvent location San Jose Country US - United States Event type WRD Language eng - English Country US - United States Keywords Image forensics ; digital forgery ; forgery detection ; resampling detection Subject RIV IN - Informatics, Computer Science R&D Projects GA102/08/0470 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10750506 - UTIA-B (2005-2011) Annotation Geometric transformations such as scaling or rotation are common tools employed by forgery creators. These procedures are typically based on a resampling and interpolation step. The interpolation process brings specific periodic properties into the image. In this paper, we show how to detect these properties. Our aim is to detect all possible geometric transformations in the image being investigated. Furthermore, as the proposed method, as well as other existing detectors, is sensitive to noise, we also briefly show a simple method capable of detecting image noise inconsistencies. Noise is a common tool used to conceal the traces of tampering. Workplace Institute of Information Theory and Automation Contact Markéta Votavová, votavova@utia.cas.cz, Tel.: 266 052 201. Year of Publishing 2009
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