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Re: need help with idl [message #82482 is a reply to message #5428]

Thu, 13 December 2012 05:59

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Ann writes:

> I defined some patches within which the pixels have varying intensity. I want to pick up pixel groups, minimum size 4 pixels with intensity greater than a given threshold. I want to use the indices of those groups.
> Could someone help me out?

Make a bi-level image with your threshold, then use
Label_Region to select your pixel groups. You can
screen them for size as you process them, discarding
any that are less than your minimum. Here is an article
that describes the process:

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

Cheers,

David

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

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[Message index]

		Need Help With idl library rpcidl.a By: Steve McLaughlin on Wed, 20 December 1995 00:00
		Re: need help with idl By: David Fanning on Thu, 13 December 2012 05:59
		Re: need help with idl By: ann[1] on Sun, 16 December 2012 00:37

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