In 1963, Gordon Rogers published a paper titled “The process of image formation as the retransformation of the coherence function,” in which he introduced a novel way of viewing the formation of an image. The objective in the following sections is to expand upon this model of the image-forming process to include the cases of full color and full 3D objects and, in addition, to show that both enhanced backscatter phenomena and an important class of superresolving imaging systems can be conveniently viewed in terms of transformations of coherence functions. Much of the discussion is qualitative. Although the basic concepts can all be expressed mathematically, it is at the cost, at least initially, of physical insight.
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