CGAL users discussion list

[Wonwoo Lee <>]

Thank for your reply Franco.
I know your EPVH library, but I have not tested
because I'm working on Windows platform.
I read CGAL document about nef polyhedron.
It provides what I wanted to do.
Does visual hull reconstruction take much time with many views ?
Did you measure the computation time to reconstruct
visual hull with CGAL and with EPVH ?




On Oct 31, 2006, at 11:38 AM, Jean-Sébastien Franco wrote:

> It is possible using the nef polyhedron library which supports the  
> boolean operators used for CSG, although it can be slow compared to  
> dedicated visual hull techniques due to use of exact arithmetic. I  
> tested visual hull computation with CGAL using the nef_3 example  
> application (which can be told what to do from the command line),  
> by giving it .off files of truncated viewing cone polyhedrons, and  
> let it generate the intersection. It was something I did last year  
> while testing EPVH, the polyhedral visual hull library I developed  
> during my thesis.
>
> JS Franco
>
> On 30 Oct 2006, at 18:38, Wonwoo Lee wrote:
> > Hi.
> >
> > Could I easily implement CSG operations such as
> > intersection, subtraction, etc with CGAL?
> > Actually, I'd like to implement a Shape from Silhouette
> > algorithm to create a visual hull from silhouette images.