#33 How to clean up scanned images

[hi2shy]

Hi

I've just started to use meshlab to try and clean up and improve scans I've taken using skanect and kinect. I'm following the following guide:
http://www.instructables.com/id/Using-Meshlab-to-Clean-and-Assemble-Laser-Scan-Dat/step5/Flattening-the-Layers/

When I try to flatten my combined layer, I have no image left. The screen is empty. Am I dooing something wrong?

Also, is there another guide to help me improve my scanned images?

Kind regards