CGAL users discussion list

[Laurent Rineau <>]

On Monday 03 November 2008 22:12:26 

 wrote:
> Hello,
>
> In order to generate a mesh for a 3D binary image (for example, but the
> question is also for multiply-labelled images), I need an oracle function
> which knows when a point is outside or inside (or in what domain). How do I
> do such a check, when I only have the 3D image, sampled grid of the surface
> as input? If I decide that every square is uniform, for example, won't the
> surface converge to be staircase-shaped?

You can use a trilinear interpolation, to interpolate the image values 
in-between the voxels.

-- 
Laurent Rineau, PhD
Engineer at GeometryFactory
http://www.geometryfactory.com/