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An improved algorithm for camera model identification using inter-channel demosaicking traces
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Hu, Yongjian, Li, Chang-Tsun, Lin, Xufeng and Liu, Bei-bei (2012) An improved algorithm for camera model identification using inter-channel demosaicking traces. In: IIH-MSP 2012: 2012 Eighth International Conference on Intelligent Information Hiding and Multimedia Signal Processing, Piraeus, Greece, 18-20 July. Published in: Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP), 2012 Eighth International Conference on pp. 325-330. ISBN 9781467317412. doi:10.1109/IIH-MSP.2012.85
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Official URL: http://dx.doi.org/10.1109/IIH-MSP.2012.85
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.
Item Type: | Conference Item (Paper) | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Computer Science | ||||
Journal or Publication Title: | Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP), 2012 Eighth International Conference on | ||||
Publisher: | IEEE | ||||
ISBN: | 9781467317412 | ||||
Book Title: | 2012 Eighth International Conference on Intelligent Information Hiding and Multimedia Signal Processing | ||||
Official Date: | 2012 | ||||
Dates: |
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Page Range: | pp. 325-330 | ||||
DOI: | 10.1109/IIH-MSP.2012.85 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Conference Paper Type: | Paper | ||||
Title of Event: | IIH-MSP 2012: 2012 Eighth International Conference on Intelligent Information Hiding and Multimedia Signal Processing | ||||
Type of Event: | Conference | ||||
Location of Event: | Piraeus, Greece | ||||
Date(s) of Event: | 18-20 July |
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