International Journal of Image, Graphics and Signal Processing (IJIGSP)
IJIGSP Vol. 7, No. 6, 8 May 2015
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Copy Move Forgery Detection in Contrast Variant Environment using Binary DCT Vectors
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Author(s)
Index Terms
Copy move forgery, intensity invariant forgery detection, binary DCT coefficients, contrast invariant forgery detection, illumination invariant, blind forgery detection
Abstract
Copy move forgery detection is a very popular research area and a lot of methods have been suggested by researchers. However, every method has its own merits and weaknesses and hence, new techniques are being continuously devised and analyzed. There are many post processing operations used by the manipulators to obstruct the forgery detection techniques. One such operation is changing the contrast of the whole image or copy moved regions, which many existing methods fail to address. A novel method using binary discrete cosine transform vectors is proposed to detect copy move forgery in the presence of contrast changes. The image is divided into overlapping blocks and DCT coefficients are calculated for these blocks. Feature vectors are created from these blocks using signs of the DCT coefficients. Coefficient of correlation is used to match resulting binary vectors. The experiments show that the proposed method is able to detect copy move forgery in presence of contrast changes. The proposed method is also invariant to other post processing operations like Gaussian noise, JPEG compression and little rotation and scaling.
Cite This Paper
Sunil Kumar, J. V. Desai, Shaktidev Mukherjee,"Copy Move Forgery Detection in Contrast Variant Environment using Binary DCT Vectors", IJIGSP, vol.7, no.6, pp.38-44, 2015. DOI: 10.5815/ijigsp.2015.06.05
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