how to denoise a point cloud and smooth the surface?

Hi everyone, i am working on 3D reconstruction. i generated a point cloud but it has spikes and the surface is not smooth. I tried "pcdenoise" to eliminate spikes but how can we make the surface smooth? here i uploaded my point cloud, any help to smooth the point cloud is valuable.

[Shahab Askarian]

I have been same problem. Check link below: http://www.mathworks.com/matlabcentral/fileexchange/8998-surface-fitting-using-gridfit