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Re: labelling of similar pixels (Connected Component Labeling) ? [message #66398]

Tue, 12 May 2009 21:46

agnarhs
Messages: 4
Registered: May 2009

Junior Member

On 12 Mai, 18:01, David Fanning <n...@dfanning.com> wrote:
> ben.bighair writes:
>> I think you want LABEL_REGION. See more at ...
>
>> IDL>?label_region
>
> Ben is right, but be careful with regions on the edge of
> pixel array. Label_Region doesn't handle such pixels very
> well. Usually, you have to build a border around your pixels
> to make things work correctly:
>
> http://www.dfanning.com/ip_tips/blobanalysis.html
>
> Cheers,
>
> David
> --
> David Fanning, Ph.D.
> Fanning Software Consulting, Inc.
> Coyote's Guide to IDL Programming:http://www.dfanning.com/
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

Thank you guys, I really appreciate it.

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Re: labelling of similar pixels (Connected Component Labeling) ? [message #66399 is a reply to message #66398]

Tue, 12 May 2009 18:01

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

ben.bighair writes:

> I think you want LABEL_REGION. See more at ...
>
> IDL>?label_region

Ben is right, but be careful with regions on the edge of
pixel array. Label_Region doesn't handle such pixels very
well. Usually, you have to build a border around your pixels
to make things work correctly:

http://www.dfanning.com/ip_tips/blobanalysis.html

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

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Re: labelling of similar pixels (Connected Component Labeling) ? [message #66401 is a reply to message #66399]

Tue, 12 May 2009 17:39

ben.bighair
Messages: 221
Registered: April 2007

Senior Member

On May 12, 6:40 pm, agna...@gmail.com wrote:
> Hi there,
>
> I'm looking for a IDL program that can do Connected Component Labeling
> (http://en.wikipedia.org/wiki/Connected_Component_Labeling). This is
> already a function in Matlab, bwlabel, and there must be something
> similar outhere for IDL???
>
> Agnar

I think you want LABEL_REGION. See more at ...

IDL>?label_region

Cheers,
Ben

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