Digital Watermarking and Steganography: Fundamentals and by Frank Y. Shih

By Frank Y. Shih

This ebook intends to supply a complete assessment on various facets of mechanisms and strategies for info safeguard. it really is written for college students, researchers, and pros learning within the box of multimedia safety and steganography. Multimedia defense and steganography is mainly appropriate as a result of the international scale of electronic multimedia and the swift progress of the net. electronic watermarking know-how can be utilized to assure authenticity and will be utilized as facts that the content material has now not been altered due to the fact that insertion. up to date innovations and advances in watermarking are explored during this re-creation. The combinational spatial and frequency domain names watermarking process presents a brand new suggestion of enlarging the embedding capability of watermarks. The genetic set of rules (GA) dependent watermarking approach solves the rounding blunders challenge and supply a good embedding process. each one bankruptcy offers the reader with a primary, theoretical framework, whereas constructing the huge complicated strategies and contemplating the fundamental ideas of the electronic watermarking and steganographic platforms. a number of strong algorithms which are offered all through illustrate the framework and supply assistance and instruments in knowing and enforcing the basic principles.

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Extra info for Digital Watermarking and Steganography: Fundamentals and Techniques, Second Edition

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0 1 Watermarked Image ... ... Additive Embedding 150 50 148 ... 4 The watermark embedding procedure of additive watermarking in the spatial domain. Two critical issues to consider in the additive watermarking are imperceptibility and the need of the original image to identify the embedded message. In order to enhance imperceptibility, a big value is not embedded to a single pixel, but to a block of pixels [7, 8]. 5 shows an example of the block-based additive watermarking. First, a 3 × 3 block is selected for embedding a watermark by adding 99.

When the signal becomes nonperiodic, its period becomes infinite and its spectrum becomes continuous. An image is considered as a spatially varying function. Fourier transform decomposes such an image function into a set of orthogonal functions, and can transform the spatial intensity image into its frequency domain. From continuous form, one can obtain the form for discrete time images. 1 (a) An 8-bit pixel with a value of 130. (b) The value is changed to 131 after the LSB substitution. (c) The value is changed to 2 after the MSB substitution.

2002. [8] Wong, P. W. ” In Proc. IEEE Int. Conf. Image Processing. Chicago, 1998. [9] Celik, M. , et al. ” IEEE Trans. Image Processing 11 (2002): 585. , and E. Delp. ” In Proc. Int. Conf. Imaging Science, Systems and Technology. Las Vegas, NV, 1997. , and T. Kaskalis. ” In Proc. IEEE Workshop on Nonlinear Signal and Image Processing, Neos Marmaras, Greece, 1995, 460. [12] Caronni, G. ” In Proc. Reliable IT Systems. Germany: Viewveg, 1995. , and L. O’Gorman. ” IEEE Computer Mag. 29 (1996): 101.

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