Hi Lars
I see that you are trying to flip the normal using the statement ptcloud.Normal = -ptcloud.Normal but you are noticing that there was no difference observed between the two mesh .
This is because MATLAB's ‘pcread’ function does not automatically compute normals when loading a point cloud from a file. So, before manipulating or visualising, normals must be computed manually.
This can be done by using the ‘pcnormals’ function.
ptcloud = pcread('Auto_Filter_35.ply');
ptcloud.Normal = pcnormals(ptCloud);
Now, as the normals are computed, you can flip them and proceed with the surface reconstruction.
For more understanding, kindly refer to the example which is explained in the following documentation :
I hope this helps.
