Abstract: Digital Image Forensic is a branch of science that deals with revealing the fake image manipulation. An image can be manipulated in several ways by making changes to an image such as compression, image splicing, cut and paste forgery, contrast enhancement etc. When we perform a jpeg compression, it would affect the visual quality of the original image. This would help the forensic detectors to identify the traces of the image ie, whether it is JPEG compressed or not. This paper introduces an anti-forensic method which removes from an image the footprints left by JPEG compression in both spatial and DCT domain. The footprints left by JPEG compression play an important role in detecting image forgeries, since JPEG is the most widely used image compression standard. So that This method can defeat the existing forensic detectors which try to identify the traces of JPEG compression history and also provides an improved trade-off between the forensic undetectability and the image quality. The main goal of Anti-forensics, is to mislead forensic investigators, which helps the researchers to study the weaknesses in the existing forensic techniques for further development of reliable digital forensics methods.
Keywords: JPEG anti-forensics, DCT histogram smoothing, double JPEG compression, JPEG Forensic.
Title: An Improved Anti-Forensic Method With Undetectability And Image Quality For JPEG Compression
Author: Anjali U, Smitha C Thomas
International Journal of Computer Science and Information Technology Research
ISSN 2348-1196 (print), ISSN 2348-120X (online)
Research Publish Journals
