Fast copy-move forgery detection
WSEAS Transactions on Signal Processing
A bibliography on blind methods for identifying image forgery
Image Communication
Region duplication detection using image feature matching
IEEE Transactions on Information Forensics and Security
Detection of image region-duplication with rotation and scaling tolerance
ICCCI'10 Proceedings of the Second international conference on Computational collective intelligence: technologies and applications - Volume PartI
Detection of copy-move forgery using multiresolution characteristic of discrete wavelet transform
Proceedings of the International Conference & Workshop on Emerging Trends in Technology
Region duplication detection based on Harris corner points and step sector statistics
Journal of Visual Communication and Image Representation
On the reliability of forensic schemes using resampling for image copy-move forgery
International Journal of Electronic Security and Digital Forensics
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Due to the abundantly available imaging technologies, manipulation of digital images has become a serious problem nowadays, in various fields like medical imaging, digital forensics, journalism, scientific publications, etc. In this paper, we concentrate on detection of a specific category of digital image forgery known as region duplication forgery or copy-move forgery, which is done by copying a block of an image and pasting it on to some other block of the same image. We present a novel approach based on the application of wavelet transform that detects and localizes such forgeries. Our technique works by first applying wavelet transform to the input image to yield a reduced dimension representation. We then perform exhaustive search to identify the similar blocks in the image by mapping them to log-polar coordinates and using phase correlation as the similarity criterion. This is done only once at the lowest resolution of the wavelet transform. Only the matched blocks are carried for comparison to the next level. This drastically reduces the time needed for the detection process. This approach works even if the pasted region has undergone transformations like translation and rotation. Keywords Digital Forensics, Copy-Move forgery, Wavelet Transform, Phase Correlation, Log-polar coordinates