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<p>The authors describe a model of nonlinear image filtering for noise reduction and edge enhancement using anisotropic diffusion. The method is designed to enhance not only edges, but corners and T junctions as well. The method roughly corresponds to a nonlinear diffusion process with backward heat flow across the strong edges. Such a process is ill posed, making the results depend strongly on how the algorithm differs from the diffusion process. Two ways of modifying the equations using simulations on a variable grid are studied.</p>
picture processing; corner enhancement; model; nonlinear image filtering; noise reduction; edge enhancement; anisotropic diffusion; filtering and prediction theory; picture processing

M. Nitzberg and T. Shiota, "Nonlinear Image Filtering with Edge and Corner Enhancement," in IEEE Transactions on Pattern Analysis & Machine Intelligence, vol. 14, no. , pp. 826-833, 1992.
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