Digital Image Forensics Using Multi-Resolution Histograms

Digital Image Forensics Using Multi-Resolution Histograms

Jin Liu, Hefei Ling, Fuhao Zou, WeiQi Yan, Zhengding Lu
DOI: 10.4018/978-1-4666-1758-2.ch011
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In this paper, the authors investigate the prospect of using multi-resolution histograms (MRH) in conjunction with digital image forensics, particularly in the detection of two kinds of copy-move manipulations, i.e., cloning and splicing. To the best of the authors’ knowledge, this is the first work that uses the same feature in both cloning and splicing forensics. The experimental results show the simplicity and efficiency of using MRH for the purpose of clone detection and splicing detection.
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Introduction To Digital Image Forensics

To acquire a forged image, we first shoot a scene to get the original image with a camera, and then alter the image with different types of manipulation technologies. On one hand, during photographing process, the camera itself may introduce some distinct artifacts into an image because of its image processing mechanism. On the other hand, the manipulation technologies may introduce some distinct artifacts into the image. These two scenarios are both used in digital image forensics. We can divide current digital image forensics technologies into two classes, one is based on the camera’s photographing mechanism, and the other is based on manipulation methods. The prior one uses camera artifacts introduced by different stages of image processing as evidence to detect manipulation: such as chromatic aberration introduced by an optical system (Micah, Johnson, & Farid, 2006), pixel’s statistical correlations introduced by color filter array interpolation (Popescu & Farid, 2005; Swaminathan & Liu, 2006; Long & Huang, 2006), camera response function with camera sensors (Hsu & Chang, 2006; Lin, Wang, Tang, & Shum, 2005), and sensor noise introduced by whole processing steps (Chen, Fridrich, Luka, & Goljan, 2007; Gou, Swaminathan, & Wu, 2007; Lukas, Fridrich, & Goljan, 2006). Furthermore, there are a wide variety of manipulation methods, therefore, digital image forensic technologies which aim at manipulation methods are varied, such as resampling detection (Gallagher, 2005; Popescu & Farid, 2005; Mahdian & Saic, 2008; Kirchner, 2008; Prasad & Ramakrishnan, 2006) and blur detection (Hsiao & Pei, 2005; Sutcu, Coskun, Sencar, & Memon, 2007). While the forensic method proposed in (Lyu & Farid, 2005; Tian-Tsong, Shih-Fu, Jessie, Lexing, & Mao-Pei, 2005) focus on how to distinguish a naturally occurred image from one computer-generated image.

In our opinion, the most general methods for tampering with an image include two kinds of copy-move manipulation: one is copying and moving a part to a different location within the same image, known as the clone operation; another is copying and moving a part of an image to another separate image, known as splicing. The examples of cloning and splicing are shown in Figure 1. Both of these two operations can easily misguide people’s understanding about the content of the image. For example, in Figure 1 (c), (d), people may be confused as to the original environment within which the cheetah was present.

Figure 1.

Cloned image and spliced image samples: (a) and (b) are cloned images, (c), (d) are spliced images (From Columbia Image Splicing Detection Evaluation Dataset. Used with permission1)


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