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A Digital Image Watermarking Scheme Based On Localised Wavelet Coefficients' Dependency
(University of Nairobi, 25-09-09)
A wavelet based robust image watermarking scheme in which a binary image is embedded in the horizontal and vertical quadrants of a wavelet transformed image is proposed. The algorithm exploits the inter-coefficients ...
A Wavelet Based Image Watermarking Scheme With A CDMA/Hadamard Embedding Technique
(University of Nairobi, 15-02-07)
A new blind digital image watermarking scheme that employs a Hadamard matrix to spread the CDMA watermark in selected DWT coefficients in a gray-level cover image is proposed. The coefficients are obtained from the 1- level ...
Digital Filter Design Using an Adaptive Modelling Approach
(University of Nairobi, 2006)
This chapter presents the design of a finite impulse response (FIR) filter using the Wiener approach and compares it with a least mean squares (LMS) design. The Wiener filter is synthesized by computing the optimum weights ...
An Image Watermarking Method Based On The Singular Value Decomposition And The Wavelet Transform
(University of Nairobi, 28-09-07)
A robust image watermarking scheme in which a binary image is embedded in the singular values of selected DWT blocks in the horizontal and vertical sub-bands of a 1-level decomposition of a gray-scale image is proposed. ...