By Ali Mohammad Al-Haj
Lately, the great development of electronic expertise has elevated the benefit with which electronic multimedia documents are kept, transmitted, and reproduced. simply because conventional copyright equipment are fallacious for constructing possession, electronic watermarking is taken into account the most effective recommendations to avoid unlawful and malicious copying and distribution of electronic media. complicated recommendations in Multimedia Watermarking: photo, Video and Audio purposes introduces readers to state of the art study in multimedia watermarking. overlaying new developments in electronic picture watermarking and methods for implementation and optimization throughout various media, this ebook is a priceless better half for execs and researchers operating in components similar to record watermarking, multimedia fingerprinting, details hiding, secured e-commerce, copyright safety, and implementation of real-time multimedia watermarking.
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Extra resources for Advanced Techniques in Multimedia Watermarking: Image, Video and Audio Applications
It has tested the algorithms for several standard geometric attacks, such as rotation, crop, scaling. The quantitative measure of the extracted watermark shows the resilience to different tests. To increase watermarking security, it was adopted the method of invisible insertion of the watermark in the most significant region of the host image such that tampering of that portion with intention to remove or destroy the watermark will degrade the esthetic quality and value of the image. The techniques insert a spatial protection key directly in the whole image, making the procedures for detecting it very hard.
Experimental results show that a typical hidden message image may be as large as half the size of the carrier image for an unnoticeable amount of noise artifacts in the stego image. Our choice of a carrier image is influenced by the most common image type exchanged over the internet, namely the Joint Photographic Experts Group (JPEG) image format. We thus start with a 24-bit Red, Green, Blue (RGB) color JPEG image as the carrier. One of the major concerns with typical data hiding techniques that use RGB color carrier images is the visible artifacts that may occur in the stego image due to embedding data directly in the individual (R,G,B) channels (which alter the carrier’s LSB of color values in common data hiding techniques).
Bloom, J. (2001). Digital Watermarking: Principles & Practice. San Francisco: The Morgan Kaufmann Series in Multimedia and Information Systems. Cox, I. , & Miller, M. (1997). A review of watermarking and importance of perceptual modeling. Proceedings of SPIE Human Vision and Imaging, 3016, 92–99. Cox, I. , & Bloom, J. (2000). Watermarking Applications and Their Properties. In Proc. of Int. Conf. Information Technology: Coding and Computing, (pp. 6-10). Cox, I. , & Kalker, T. (2007). Digital Watermarking and Steganography.