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Learned adaptive nonlinear filtering for anisotropic diffusion approximation in image processing

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2 Author(s)

In the machine vision community multi-scale image enhancement and analysis has frequently been accomplished using a diffusion or equivalent process. Linear diffusion can be replaced by convolution with Gaussian kernels, as the Gaussian is the Green's function of such a system. In this paper we present a technique which obtains an approximate solution to a nonlinear diffusion process via the solution of an integral equation which is the nonlinear analog of convolution. The kernel function of the integral equation plays the same role that a Green's function does for a linear PDE, allowing the direct solution of the nonlinear PDE for a specific time without requiring integration through intermediate times. We then use a learning technique to approximate the kernel function for arbitrary input images. The result is an improvement in speed and noise-sensitivity, as well as providing a parallel algorithm

Published in:

Pattern Recognition, 1996., Proceedings of the 13th International Conference on  (Volume:4 )

Date of Conference:

25-29 Aug 1996

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