A SIFT-Based Forensic Method for Copy-Move Attack Detection and Transformation Recovery

One of the principal problems in image forensics is determining if a particular image is authentic or not. This can be a crucial task when images are used as basic evidence to influence judgment like, for example, in a court of law. To carry out such forensic analysis, various technological instrume...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on information forensics and security 2011-09, Vol.6 (3), p.1099-1110
Main Authors: Amerini, I., Ballan, L., Caldelli, R., Del Bimbo, A., Serra, G.
Format: Article
Language:English
Subjects:
Authenticity verification
Cloning
copy-move attack
digital image forensics
Digital images
Discrete cosine transforms
Feature extraction
Forensic engineering
Forensics
Forgery
Forges
Geometric transformation
geometric transformation recovery
Reproduction
Studies
Tasks
Transformations
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:One of the principal problems in image forensics is determining if a particular image is authentic or not. This can be a crucial task when images are used as basic evidence to influence judgment like, for example, in a court of law. To carry out such forensic analysis, various technological instruments have been developed in the literature. In this paper, the problem of detecting if an image has been forged is investigated; in particular, attention has been paid to the case in which an area of an image is copied and then pasted onto another zone to create a duplication or to cancel something that was awkward. Generally, to adapt the image patch to the new context a geometric transformation is needed. To detect such modifications, a novel methodology based on scale invariant features transform (SIFT) is proposed. Such a method allows us to both understand if a copy-move attack has occurred and, furthermore, to recover the geometric transformation used to perform cloning. Extensive experimental results are presented to confirm that the technique is able to precisely individuate the altered area and, in addition, to estimate the geometric transformation parameters with high reliability. The method also deals with multiple cloning.
ISSN:1556-6013
1556-6021
DOI:10.1109/TIFS.2011.2129512