Using Meshlab to Clean and Assemble Laser Scan Data

Step 3 Glueing the Meshes

You will now have three separate layers each with meshes that are not aligned. Close the Layer Dialog menu and click on the Align icon to open the Align tool. This tool is used to reposition the separate meshes in relation to each other. Click on the first mesh file in the menu and choose Glue Mesh Here. This will affix the mesh to a set location and allows the other meshes to be aligned to it.

Next, choose the second mesh and click on Point Based Glueing. This feature will use 4 or more user selected points to approximate the alignment of the second mesh in relationship to the first. When the alignment window opens it will display the first glued mesh and the second mesh, both with different colors to assist in the point selection. Rotate both models around and position them in a similar manner. Try to place them in a position that shows as much overlapping information as you can. Then, choose 4 or more similar points on each mesh. They don't have to be exact, but be as accurate as you can. After selecting the points, click OK.

If the selected points were close, the two meshes should automatically align. Again, they will not be exact, but should be extremely close. If you are happy with the alignment, click the Process button to align them even more accurately and to glue them in place.