[vtkusers] 3D surface reconstruction from 2D contours (RT structure set) and 3D image

[lars-friedrich]

Hello Bryn,

thank you for your reply!
This idea sounds really promising.

Tank you,
Lars


Bryn Lloyd-2 wrote:
> 
> Hello,
> 
> You could create a 3D distance image from the 2D contours.
> 
> For all slices k:
> 
>    For all pixels in slice k compute the signed distance to 2D contour k,
>    i.e. distance + inside/outside information wrt 2D contour k.
> 
> Working through the whole stack of contours will give you a 3D signed 
> distance image, which you can apply marching cubes to.
> 
> 
> --Bryn
> 
> 
> 
> 
> lars-friedrich wrote:
>> Hello,
>> 
>> I would like to know if there is someone among you having experience with
>> 3D
>> polydata surface reconstruction from 2D contours (RT structure set) and
>> 3D
>> images (e.g. CT data set on which the contours were created).
>> Are there applicable tools in VTK which can be used for this purpose? I
>> know
>> that it is a problem to reconstruct 3D surfaces from 2D contours alone
>> (especially at bifurcations and comparable situations). But I guess,
>> having
>> the respective 3D image data as well should deliver additional knowledge
>> and
>> it should help stabilizing such algorithms. The problem is that marching
>> cubes alone is not enough because the contours do not necessarily
>> correlate
>> with a specified iso-level.
>> Could you give me some hints on this topic, please?
>> 
>> regards,
>> lars
>> 
>> 
> 
> 
> -- 
> -------------------------------------------------
> Bryn Lloyd
> Computer Vision Laboratory
> ETH Zürich, Sternwartstrasse 7
> CH - 8092 Zürich, Switzerland
> Tel: +41 44 63 26668
> Fax: +41 44 63 21199
> -------------------------------------------------
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