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Shape from focus: an effective approach for rough surfaces

by: S. K. Nayar, Y. Nakagawa
In Robotics and Automation, 1990. Proceedings., 1990 IEEE International Conference on (May 1990), pp. 218-225 vol.2, doi:10.1109/robot.1990.125976  Key: citeulike:11344410

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Abstract

Two algorithms for depth estimation are presented. The first algorithm simply looks for the focus level that maximizes the focus measure at each image point. The second algorithm uses a Gaussian model to interpolate the focus measures to obtain more accurate depth estimates. The algorithms were implemented and tested on surfaces of different roughness and reflectance properties. The results indicate that the shape-from-focus method may be applied to a variety of industrial vision problems


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