Noise removal using a nonlinear two-dimensional diffusion network
Résumé
We consider a two-dimensional nonlinear electrical lattice of N x N identical cells modeling a two-dimensional discrete Nagumo equation. Appropriate description of the function describing the nonlinearity allows to predict analytically the temporal behavior of coherent signals, weakly varying in space, on which are superimposed perturbations of small amplitude. Applications to the improvement of signal to noise ratio of signals or images are proposed.