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MEDIAFORENSICS
2010

On detection of median filtering in digital images

8 years 8 months ago
On detection of median filtering in digital images
In digital image forensics, it is generally accepted that intentional manipulations of the image content are most critical and hence numerous forensic methods focus on the detection of such `malicious' post-processing. However, it is also beneficial to know as much as possible about the general processing history of an image, including content-preserving operations, since they can affect the reliability of forensic methods in various ways. In this paper, we present a simple yet effective technique to detect median filtering in digital images--a widely used denoising and smoothing operator. As a great variety of forensic methods relies on some kind of a linearity assumption, a detection of non-linear median filtering is of particular interest. The effectiveness of our method is backed with experimental evidence on a large image database.
Matthias Kirchner, Jessica J. Fridrich
Added 29 Oct 2010
Updated 29 Oct 2010
Type Conference
Year 2010
Where MEDIAFORENSICS
Authors Matthias Kirchner, Jessica J. Fridrich
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