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From: "Michael Garrity" <mNOSPAMgarrity@mathworks.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: isosurface visualization
Date: Fri, 16 May 2008 08:52:24 -0400
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"misty m." <donotspam@smth.be> wrote in message news:g0ji72$1o5$1@fred.mathworks.com...
> hi,
> i would like to do some 3d volume visualization. i have CT
> images of drilled (in a bone) hole.
> from each of images i've found contours of drilled hole-so
> i've got (x,y) coefficients of each hole. i decided the
> distance between holes = 1. so i've got 3d coeffiecients
> for my solid, x,y-coefs of hole and z-distance.
> i would like to do the visualization using 'isosurface',
> cause i like its effects most, but..
>
> fv = isosurface(X,Y,Z,V,isovalue)
>
> X,Y,Z - i've got
> V - i do not have volume
> isovalue - what describes it? what value should it have?
>
> i would be really gratefull for any suggestions,
> kind regards

No, isosurface works directly from the CT images. You stack
them up to form a 3D array V, and then give that to isosurface.
The isovalue is the level at which you've drawn your contours.

I don't know of a MATLAB function for building a surface
between a set of contours. There are some tricky cases there
when you have a different number of sample points in adjacent
contours or when the topology changes between contours.

    -MPG-