| Image segmentation programs in IDL? [message #51897] |
Wed, 13 December 2006 06:39  |
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Tim[3]
Messages: 1
Registered: December 2006
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Junior Member |
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I am looking for image segmentation routines that are available in or
written in IDL. I think my images are not very challenging. They have
been thresholded, so that the regions I want to segment all have values
of -1, and the background is +1. The boundaries are smooth. Examples of
the images can be found about a third of the way down the page at
http://physics.kenyon.edu/people/sullivan/Research/CahnHilli ard/ .
I am aware of the particle tracking algoriths of Crocker, Weeks, and
Spalding, et al., but their problem is identifying same size circular
images and my objects vary in widely size and shape.
There is one complication that I can live without at first, but would
eventually need to rectify. My fields are have periodic boundary
conditions, so eventually I would like an algorithm that identified as
one object, an object that wraps around the top and bottom and left and
right sides of the image.
If I knew anything about image segmentation, I suspect this would be
easy. But I don't. Any help would be appreciated.
Tim Sullivan
sullivan@kenyon.edu
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| Re: Image segmentation programs in IDL? [message #52023 is a reply to message #51897] |
Thu, 21 December 2006 12:08  |
Tim[2]
Messages: 3
Registered: December 2006
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Junior Member |
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Thanks!
Label_regions did do the trick. I've been distracted lately, but hope
to post my resultant code soon.
Tim
On Dec 21, 8:45 am, "Anne" <anne.mar...@swri.ca> wrote:
> Hi Tim,
> I agree that label regions is probably going to work. The boundary
> conditions should be fairly easy to cope with. On first look I would
> just create 2 extra copies of the image using the shift command (x and
> y direction) and repeat the label regions command. Objects that have
> wrapped around will be recombined in the shifted image and it should be
> straight forward to identify these.
>
> Anne Martel
> Imaging Research
> Medical Biophysics
> University of Toronto
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| Re: Image segmentation programs in IDL? [message #52034 is a reply to message #51897] |
Thu, 21 December 2006 05:45 |
Anne[1]
Messages: 8
Registered: February 2006
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Junior Member |
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Hi Tim,
I agree that label regions is probably going to work. The boundary
conditions should be fairly easy to cope with. On first look I would
just create 2 extra copies of the image using the shift command (x and
y direction) and repeat the label regions command. Objects that have
wrapped around will be recombined in the shifted image and it should be
straight forward to identify these.
Anne Martel
Imaging Research
Medical Biophysics
University of Toronto
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