The book "Signal Processing for Image Enhancement and Multimedia Processing" offers a comprehensive analysis and discussion of advanced signal processing techniques relevant for the enhancement of image and video data. Edited by recognized international researchers, it is based on the best contributions from the SITIS 2006 International Conference. The chapters are designed to reflect the latest state of research and address the application of these techniques for efficient data processing and knowledge extraction. The work covers, among other topics, feature-based techniques for deeper image analysis as well as new approaches to video coding, particularly concerning the security of image information. It is aimed at professionals and researchers in the industry and can also serve as a reference work for advanced students in the fields of computer science and engineering.