I would suggest using synth export (http://synthexport.codeplex.com/
) to download the pointcloud if it's your first time using Meshlab. Once you're comfortable with using meshlab with the synth export, try your hand at Photosynth Toolkit4. I would also suggest to use one of the first two synths you showed above since they seem to have dense, object-centered point clouds.
Here's a brief description which I copied from my google doc at https://docs.google.com/document/pub?id ... 2fysannjt9
Let me know if you have any questions.
4_A. Synth Export
a. Download Synth Export (http://synthexport.codeplex.com/
b. Export pointcloud in .asci
5_A. Meshlab (or viewing software of choice)
1. Import pointcloud.ascii into Meshlab
2. Remove unwanted points (Point select>Delete Point)
3. Save cleaned up image as .ply
4. Compute Normals: Filters>Normals, Curvatures, and Orientation>Compute Normals for Point sets. This filter has a single parameter for the number of neighbors. I leave the parameter set at the default value which is 10 neighbors. (50-100 worked better for brain. b/c it was noisy??? many points???).
5. Generate a mesh using the Poission reconstruction. The function can be found under: Filters>Point Set>Surface Reconstruction: Poisson Reconstruction.
This filter has four parameters. Click the help button for more information on the parameters. It is important to read about their function as altering the parameters profoundly changes the results. I typically use the following values: Octree Depth = somewhere between 10-12, Solver Divide = either 7 or 8, Samples per Node = 1 (default), Surface offseting = 1 (default). This can be quite glitchy-I’ve found that Octree Depth=11 and Solver Divide=7 tends to work so I’ve stuck with that.
6. If the resulting mesh is a bubble (which it very often is), remove the unwanted parts of the bubble. This task is performed using the triangle selection tool and the triangle deletion tool. Both of these are on the tool bar. They can be found near the point selection and deletion tools.
7. Remove edges with faces. This function can be fund under Filters> Cleaning and Repairing> Remove edges with faces longer than...
Filter>Sampling>Vertex Attribute Transfer Function
Make Sure the original pointcloud is selected up top and the poisson mesh is selected down below
Default level (2?) should be good enough.