A Robust Image Watermarking in the Joint Time-Frequency Domain
نویسندگان
چکیده
منابع مشابه
A Robust Image Watermarking in the Joint Time-Frequency Domain
With the rapid development of computers and internet applications, copyright protection of multimedia data has become an important problem. Watermarking techniques are proposed as a solution to copyright protection of digital media files. In this paper, a new, robust, and high-capacity watermarking method that is based on spatiofrequency (SF) representation is presented. We use the discrete evo...
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This work was funded in part by the US Air Force Office of Scientific Research under grant F49620-01-1-0446. ABSTRACT Filtering in time-frequency domain involves synthesis of signals with specific time-frequency signature. In this work we observe that watermarking of time-frequency distributions is a similar problem. The proposed domain is the joint time-frequency cells of the Wigner Distributi...
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The contourlet transform has the benefit of efficiently capturing the oriented geometrical structures of images. In this paper, by incorporating the ideas of Stein’s Unbiased Risk Estimator (SURE) approach in Nonsubsampled Contourlet Transform (NSCT) domain, a new image denoising technique is devised. We utilize the characteristics of NSCT coefficients in high and low subbands and apply SURE sh...
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ژورنال
عنوان ژورنال: EURASIP Journal on Advances in Signal Processing
سال: 2010
ISSN: 1687-6180
DOI: 10.1155/2010/509757