Hiding traces of median filtering in digital images

Detection of median filtering is an important task in image forensics, since this operator is frequently used both for benign and malicious processing. In this paper we introduce a counter-forensic technique that allows to conceal traces left by median filtering while preserving the quality of the processed image. The work aims to hide traces searched by state-of-the-art tools, and does not require JPEG compression of the image to hide traces.