Mesh denoising for grids, using the algorithm of Sun et al. (2007).References:Cardiff University: Filtering and Processing of Irregular Meshes with Uncertainties. online.Stevenson, J.A., Sun, X., Mitchell, N.C. (2010): Despeckling SRTM and other topographic data with a denoising algorithm, Geomorphology, Vol.114, No.3, pp.238-252.Sun, X., Rosin, P.L., Martin, R.R., Langbein, F.C. (2007): Fast and effective feature-preserving mesh denoising. IEEE Transactions on Visualization and Computer Graphics, Vol.13, No.5, pp.925-938.