This chapter takes a very broad view of the whole computational approach to vision, inquiring into its most important general features and how they relate to one another, and tries to say something about the style of research that this approach implies. It addresses the notion of different levels of explanation, visual information processing, the processes for recovering the various aspects of the physical characteristics of a scene from images of it, and the methodology or style of this type of approach. The chapter shows that the duality between representations and processes often presents a useful aid to thinking about how best to proceed when studying a particular problem. It is also suggested that there is no real recipe for this type of research.
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