Data in image systems

Modern imaging systems are digital and can be considered sources of data to be further processed and analysed. The properties of image data are vary different due to the wide spectrum of the physical principles used for imaging. The image data processing must reflect the specific properties of concrete image data, should the optimum quality of the resulting images be obtained, or the optimal derived, e.g. diagnostic information be provided.
The subject deals with properties of the signals and data in the main imaging modalitites used namely in biomedical and ecological field but also in other applications. The properties and parameters characterising the data are discussed separately for each imaging modality. The physical principles of the imaging are discussed only in the most basic frame necessary for understanding of the imaging modality properties; the technological and construction aspects are out of the interest region. The emphasis is put on the models of signals and data in the concrete modalitites and their analysis including the basic disturbing phenomena; the result of the discussion are the requirements to the data postprocessing.