| can you easily make "test" data volumes with simple shapes? [message #35770] |
Mon, 21 July 2003 18:16  |
Jeff Nettles
Messages: 5
Registered: June 1999
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Junior Member |
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Hi folks,
I'm working with some CT data of meteorites, and have been measuring shapes
of objects in the CT volume. The objects are basically spheroids, with
varying degrees of irregularity, both in surface roughness and sphericity.
I've taken a bunch of random slices through one of the objects, and made
some measurements of those slices (the slices are supposed to mimic what
you'd see on a microscope slide). So i have, for example, histograms of the
area and perimeters of those objects. Now what i'd like to do is to take a
bunch of random slices through a perfectly spherical object, and slices
through a very irregular object, and see how the histograms differ.
So what i'd like to do is create a data volume that contains a perfect
sphere, with brightness values of >1 in the sphere and = 0 outside the
sphere. Then make a very irregular one. I know i can do this the long and
hard way by making a series of images of circles with increasing and then
decreasing diameters, but if there's an easier way i'd sure like to do it
that way. So if anyone knows of a short cut that gets me around a long day
of use of either photoshop or illustrator or both, i'd love to hear it. Or
better still, if anyone has some data like this already and is willing to
share it, why that'd be perfect!! :D
Thanks so much for your time and hopefully your help,
Jeff
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