An improved algorithm for camera model identification using inter-channel demosaicking traces

Yongjian Hu, Chang Tsun Li, Xufeng Lin, Bei Bei Liu

Research output: Book chapter/Published conference paperConference paper

6 Citations (Scopus)

Abstract

Most CFA (color filter array) interpolation-based digital image forensic methods characterize inter-pixel relationship with a linear model and use the estimated interpolation coefficients as features for image source camera identification. However, various CFA models and interpolation algorithms must be tried for coefficient estimation during the detection process in that the CFA pattern of an image is often unknown at the receiver's end. This incurs high computational complexity. Instead of using inter-pixel correlations, Ho et al. proposed to use inter-channel demosaicking/color interpolation traces for identifying the source camera model of a test image. In this work, we propose an improved algorithm. We first extract two variance maps by estimating the variances of each component of the green-to-red and green-to-blue spectrum differences, respectively, and then take the shape and texture features of these two maps for camera model identification. Experimental results show that our method achieves better overall performance.
Original languageEnglish
Title of host publicationProceedings of the 2012 8th International Conference on Intelligent Information Hiding and Multimedia Signal Processing
Subtitle of host publicationIIH-MSP 2012
Place of PublicationUSA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages325-330
Number of pages6
ISBN (Print)9780769547121
DOIs
Publication statusPublished - 2012
Event8th International Conference on Intelligent Information Hiding and Multimedia Signal Processing: IIHMSP-2012 - Department of Informatics, University of Piraeus, Piraeus-Athens, Greece
Duration: 18 Jul 201220 Jul 2012
https://web.archive.org/web/20120422072853/http://iihmsp12.unipi.gr (Conference website)

Conference

Conference8th International Conference on Intelligent Information Hiding and Multimedia Signal Processing
CountryGreece
CityPiraeus-Athens
Period18/07/1220/07/12
OtherIIH-MSP 2012 is the eighth International Conference on Intelligent Information Hiding and Multimedia Signal Processing. The conference this year is technically co-sponsored by IEEE and the European Association for Biometrics (EAB) and hosted by the University of Piraeus, Piraeus, Greece. Multimedia technologies with an increasing level of intelligence are emerging to enable the process of creating a global information infrastructure that will interconnect heterogeneous computer networks and various forms of information technologies around the world. The conference is intended as an international forum for researchers and professionals in all areas of information hiding and multimedia signal processing.
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    Hu, Y., Li, C. T., Lin, X., & Liu, B. B. (2012). An improved algorithm for camera model identification using inter-channel demosaicking traces. In Proceedings of the 2012 8th International Conference on Intelligent Information Hiding and Multimedia Signal Processing: IIH-MSP 2012 (pp. 325-330). [6274246] IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/IIH-MSP.2012.85