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Wireless Sensor Networks (WSN) are difficult to deploy. Limited energy, bandwidth, hardware and lack of security make WSN implementation difficult. Conventional security mechanisms cannot be applied because of the inherent processing and communicational constraints that exist in WSN. This book focuses on the design, implementation and analysis of an Optimized Security Protocol (OSP) that fulfills the requirements of confidentiality, authentication and integrity in WSN. OSP fulfils requirements of high level security without compromising resources. OSP architecture is based on the further...

Examines the physics of metamaterials with an emphasis on negative-index metamaterials and their applications at terahertz frequencies. Featuring coverage on a broad range of topics, such as electromagnetic waves, harmonic oscillator model, and scattering analysis, this book is aimed at academics, researchers, engineers, industrialists, and graduate students researching in the field.

Colored digital images are extensively used in computer applications. Uncompressed digital images require considerable storage capacity and transmission bandwidth. Efficient image compression solutions are becoming more critical with the recent growth of data intensive, multimedia-based web applications. This book studies color image compression with discrete Cosine, Fourier and Wavelets (Haar and Daubechies) transforms. As a necessary background, the basic concepts of color images, Wavelets and recently used compression algorithms are discussed. In the end, comparison of different...

Face recognition is a difficult problem .Thedimension reduction and the skill to acquire minimumsize of feature vector required for face recognitionfor diverse facial expressions is a challenging taskin face recognition. Dimension reduction results inremoval of irrelevant variables along with noisetherein and a lower computation complexity ofsubsequent processing. This book addresses thechallenges of dimension reduction, choice of minimumsize feature vector for face recognition andminimization of adverse effects of varying facialexpressions on the recognition through reduction inimage...