[vtkusers] smoothing / decimation / isocontours / distance between surfaces

[jon n]

thanks for the suggestions,

also, i was thinking maybe raycasting from the top and then the bottom might 
work? like by marking the first point it hits at a certain level... but it 
seems that all the ray casting functionality is now Volume specific. maybe 
vtkVolumeRayCastIsosurfaceFunction might be useful somehow?


>From: "John Biddiscombe" <jbiddiscombe at skippingmouse.co.uk>
>Reply-To: "John Biddiscombe" <jbiddiscombe at skippingmouse.co.uk>
>To: "jon n" <elwo73 at hotmail.com>, <vtkusers at public.kitware.com>
>Subject: Re: [vtkusers] smoothing / decimation / isocontours / distance 
>between surfaces
>Date: Thu, 4 Apr 2002 23:32:59 +0100
>
>
> > and does anyone have any suggestions on how to get distances between two
> > surfaces?
>
>if the surfaces are simple, Shoot a ray from one to the other, normal 
>vector
>launching.
>
>if the surfaces are complex, like unsmoothed cloud bases and tops
>
>try (bone thickness analysis paper)
>
>Hildebrand, T. and Ruegsegger, P. A new method for the model independent
>assessment of thickness in three-dimensional images. J Microsc 185:67-75;
>1997.
>
>The addresses some of the problems related to surfaces which are not at a
>constant separation and are not parallel. A maximal sphere fitting 
>algorithm
>is discussed.
>
>JB
>
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