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Compression of digital images has been a topic of research for many years and a number of image compression standards have been created for different applications. This thesis focuses on some key technologies for image compression, namely wavelet-based image coders that combines transform coding with sub-band coders and carried out a comparative study of wavelet-based coding for still images using second generation wavelets via lifting scheme. Wavelet coders apart from offering superior compression ratios have also very useful features such as resolution scalability. There has been recent...

With the grow of the Internet and rapid advances made in storage devices, non-standard data such as images and videos have grown significantly in size. Rich information is hidden in these data collections that are potentially useful in a wide range of applications and research. The process of discovering valuable information from image data termed image mining finds its sources in data mining, content-based image retrieval, image understanding and computer vision. Image description constitutes the initial basis for the image mining. The ability to develop an efficient and effective image...