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Abstract : |
In the case of machine vision: : : one ought to understand image formation if one wishes to recover information about the world from images.-- B. K. P. Horn(1986)[7]. The image of a scene formed by an optical system such as a lens contains both photometric and geometric information about the scene. `Inverse Optics ' is the problem of recovering this information from a set of images sensed by the camera. Previous solutions to this problem-- the depth-from-focusing methods-- required a large number (in principle, infinitely many) of images to be recorded and processed. Hence the methods were slow and computationally intensive. Recent work in this area suggests solutions that require only a few images and therefore are fast and computationally efficient. Here we present a coherent view of recent developments. Theoretical principles, practical issues, and unsolved problems are discussed. Preliminary experimental results are presented., |
