Effective image forgery detection of tampered foreground or background image based on image watermarking and alpha mattes
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This paper proposes an effective image forgery detection scheme that identifies a tampered foreground or background image using image watermarking and alpha mattes. In the proposed method, component-hue-difference-based spectral matting is used to obtain the foreground and background images based on the obtained alpha matte. Next, image watermarking based on the discrete wavelet transform, discrete cosine transform, and singular value decomposition is used to embed two different watermarks into the foreground and background images, respectively. Finally, the difference between the obtained singular values is used to detect tampering of foreground or background image. Experimental results show that the proposed method performs well in terms of image forgery detection.
KeywordsImage forgery Image matting Image watermarking Alpha matte
This paper has been supported by the National Science Council, Taiwan, under grant no. NSC102-2221-E-346-007. The authors wish to express the appreciation to Prof. Chih-Chin Lai and Prof. Zhouchen Lin for their help with the experiments. The authors also gratefully acknowledge the helpful comments and suggestions of reviewers, which have improved the quality and presentation.
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