[Insight-developers] level set question: inside/outside

[Carl-Fredrik Westin]

Hi,
I am using positive-outside, (so are Karl Krissian, Liana Lorigo, Mike Leventon)
No strong preference though since both ways are fine.
C-F

Joshua Cates wrote:
> Hi Lydia,
> 
> We should probably adopt a convention.  I used the positive-inside
> convention only because that is what folks around me are using.  But now
> I'm discovering the positive-outside convention is probably more what
> others are accustomed to.  I wouldn't be able to do it any time soon, but
> I can change my code to produce positive-outside.  I don't have a strong
> preference either way.
> 
> Josh.
> 
> ______________________________
>  Josh Cates			
>  School of Computer Science	
>  University of Utah
>  Email: cates@sci.utah.edu
>  Phone: (801) 587-7697
>  URL:   http://www.sci.utah.edu/~cates
> 
> 
> On Thu, 13 Feb 2003, Lydia Ng wrote:
> 
> 
>>Dear Level Set People,
>> When using level sets for segmentation I have been (maybe naively)
>>using negative-inside/ positive-outside representation. The ITK level
>>set framework uses the opposite positive-inside/negative-outside
>>representation. Is there a standard convention? Should we adopt a
>>convention for ITK? Should we support both?
>> - Lydia



-- 
Dr. Carl-Fredrik Westin
Director, Laboratory of Mathematics in Imaging (LMI)
Assistant Professor of Radiology, Harvard Medical School
Brigham and Women's Hospital, 75 Francis St., Boston, MA 02115

Phone: (+1) 617-278-0639, Fax: (+1) 617-264-6887
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