CGAL users discussion list

[Sebastien Loriot <>]

Surface_mesher package is somehow no longer maintained in favor of the 
Mesh_3 package that
can achieve similar results when dropping cell criteria.

Gray image expects continuous values (`create_gray_image_mesh_domain()` 
in Mesh_3) so giving different iso-value will give different results as 
an interpolation is searched in the image.

https://doc.cgal.org/latest/Mesh_3/classCGAL_1_1Labeled__mesh__domain__3.html#ab7746c99b2eff13b7f70d2f3d6a831eb

In your case, you have a segmented image and 
`create_labeled_image_mesh_domain()` should be used

https://doc.cgal.org/latest/Mesh_3/classCGAL_1_1Labeled__mesh__domain__3.html#a2d77aff36bbb720190b01e3d36f76a67

HTH

Sebastien.


On 12/26/20 3:36 AM, ianben ( via cgal-discuss Mailing 
List) wrote:
> I am trying to generate the surface mesh of a 3D binary segmented volumetric
> label(the voxel value is 0 and 1) using the code in
> Surface_mesher/mesh_a_3d_gray_image.cpp
> <https://doc.cgal.org/latest/Surface_mesher/Surface_mesher_2mesh_a_3d_gray_image_8cpp-example.html>
> . When I tried different isovalues ranging from 0.1-0.9, I get different
> surface meshes with different vertices and facets.
>
> It seems that the the isovalues was used to get the signs of f(p)-isovalue,
> but what is the function f and how the isovalue can impact the meshing
> result?
>
> Thank you.
>
>
>
> --
> Sent from: http://cgal-discuss.949826.n4.nabble.com/