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This textbook deals with the analysis and design of imaging systems and image processing systems. It contains the background material necessary for understanding both the physics of such systems and the way in which the designs accommodate the visual perception of the observer. The mathematics of converting optical images to electrical signals and vice versa is emphasized and stress is laid on the point that the quality of such conversions can only be judged subjectively. The material is accessible to senior undergraduates and first year graduate students. A knowledge of elementary physics, calculus, and linear systems theory is assumed, but an extensive mathematical and statistical background is not required. This second edition has been updated and includes two new chapters, on colour and the design of improved television systems, and there is also an appendix describing the current status of high-definition television throughout the world.