This textbook deals with the analysis and design of imaging systems and image processing systems. It contains in a single volume 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. Of central importance is the mathematics of converting optical images to electrical signals and vice versa, whereby it is stressed that the quality of such conversions must be judged subjectively. The material is easily 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 completely new chapters, on color and the design of improved television systems, and an appendix describing the current status of high-definition television throughout the world.