An improved contourlet transform technique for image watermarking
Journal Title: International Journal of Research in Computer and Communication Technology - Year 2013, Vol 2, Issue 11
Abstract
In this paper, contourlet transform technique is explored to hide the information confidentially from the unauthorized users. The image is decomposed into subbands by using contourlet transform. These subbands are useful for watermark is embedded into the contourlet coefficients. These subbands contain directionality as well as anisotropy. Watermarked image is generated as the combination of watermark image is product with the same size of pseudo random data with a constant and highest frequency subband of original image. The number of attacks such as JPEG, median filter, gaussian filters, rotation, cropping, and salt & peppers are tested. Watermark image has extracted from the watermarked image with the help of inverse contourlet transform. Experiment results for proposed method gives better PSNR value compared to the existing methods.
Authors and Affiliations
Y. Anusha, K. Veeraswamy
Keywords
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