| Connected component analysis [message #22331] |
Wed, 08 November 2000 00:00  |
Dave Brennan
Messages: 28
Registered: December 1998
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Junior Member |
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Hi,
I am currently trying to write a program in IDL to analyze brain MRI
images. This involves using various morphological operations. I was
wondering if anyone has any experience using connected component
analysis in IDL.
I am trying to replicate results that I can produce using Analyze AVW's
connect operator (this connects 3D binary structures and gives them a
grey scale value relating to their size).
If anyone has any code or knows of a good way to go about this (or any
good references) please could you let me know.
Thanks for your help
Dave Brennan
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| Re: Connected component analysis [message #22417 is a reply to message #22331] |
Thu, 09 November 2000 00:00  |
Dave Brennan
Messages: 28
Registered: December 1998
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Junior Member |
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Hi Jason,
Thanks for the info Jason. Sometimes I can't see the wood for the trees and
that is where the newsgroup comes to the rescue!
After looking through the IDL documentation, somehow I managed to miss
LABEL_REGION. This is exactly what I am looking for. I have already
binarised the data by this point so the function does what I need.
However, the new routine you mention does sound interesting and so I will
have a look at it.
Thanks for the info.
Cheers
Dave Brennan
"Jason P. Meyers" wrote:
> Dave,
>
> This sounds like a 3-D extension of a problem we discussed in our
> graduate DIP class. One of our homework problems involved discussing an
> algorithm to do a 2-D analogy of what you are asking. Our professor,
> Dr. Rhody, has a rather extensive website which includes most of our
> class notes on the subject. His library of routines also has a program
> called HR_LABEL_REGION which is an improved version of IDL's
> LABEL_REGION routine which only works on binary images.
>
> You can check out the website at: http://www.cis.rit.edu/class/simg782/
>
> The textbook that we use in the class is Digital Image Processing, by
> Gonzalez and Wood, ISBN 0-201-50803-6. I don't know how useful it is
> for your problem because we have been relying mostly on the professor's
> class notes and only use the text as a reference from time to time.
>
> Please let me know if you think I might be able to help you further.
>
> Jason Meyers
> Ph.D. Student, Center for Imaging Science
> Rochester Institute of Technology
> jpm7934@rit.edu
>
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| Re: Connected component analysis [message #22423 is a reply to message #22331] |
Wed, 08 November 2000 00:00 |
Jason P. Meyers
Messages: 24
Registered: September 2000
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Junior Member |
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Dave,
This sounds like a 3-D extension of a problem we discussed in our
graduate DIP class. One of our homework problems involved discussing an
algorithm to do a 2-D analogy of what you are asking. Our professor,
Dr. Rhody, has a rather extensive website which includes most of our
class notes on the subject. His library of routines also has a program
called HR_LABEL_REGION which is an improved version of IDL's
LABEL_REGION routine which only works on binary images.
You can check out the website at: http://www.cis.rit.edu/class/simg782/
The textbook that we use in the class is Digital Image Processing, by
Gonzalez and Wood, ISBN 0-201-50803-6. I don't know how useful it is
for your problem because we have been relying mostly on the professor's
class notes and only use the text as a reference from time to time.
Please let me know if you think I might be able to help you further.
Jason Meyers
Ph.D. Student, Center for Imaging Science
Rochester Institute of Technology
jpm7934@rit.edu
Dave Brennan wrote:
>
> Hi,
>
> I am currently trying to write a program in IDL to analyze brain MRI
> images. This involves using various morphological operations. I was
> wondering if anyone has any experience using connected component
> analysis in IDL.
> I am trying to replicate results that I can produce using Analyze AVW's
> connect operator (this connects 3D binary structures and gives them a
> grey scale value relating to their size).
>
> If anyone has any code or knows of a good way to go about this (or any
> good references) please could you let me know.
>
> Thanks for your help
>
> Dave Brennan
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