[vtkusers] Scalar value minima in PolyData

[Dominik Szczerba]

What about computing the gradient first?
-- Dominik

On Wednesday 21 November 2007 22.06:41 David.Pont at ensisjv.com wrote:
> "Kevin H. Hobbs" <hobbsk at ohiou.edu> wrote on 22/11/2007 02:40:31:
> > Is there a better way to find all of the positions of the scalar value
> > minima in a PolyData than to :
> >    loop over all of the points
> >       loop over all of the cells the point is in
> >          loop over all of the other points in the cell
> >             compare the values of the other points to the first points
>
> value
>
> >       save the points location if it is value is less than all of
> > its neighbor's values.
>
> vtkThresholdPoints can be used to extract all points with a scalar value <=
> a specified threshold, but if you are after local minima then you are on
> the right track.
>    DP
>
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-- 
Dominik Szczerba, Ph.D.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi