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Re: Today's IDL Lesson [message #61922]

Thu, 14 August 2008 13:27

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

d.rowenhorst@gmail.com writes:

> Yeah - I learned a little bit ago that anytime that you are looping
> over a where function to pull out individual regions, a histogram with
> reverse_indices is going to going to get the job done much faster

I guess the lesson I learned is that I am pretty much
never going to use LABEL_REGION without also using
HISTOGRAM. In fact, because you have to also muck
around with LABEL_REGION to get good results, I
am going to write my own function that does all this
all at once! Look for it soon in the Coyote Library. :-)

This would make a *perfect* object, and you
don't even have to save the image. All you need
is the REVERSE_INDICES from the Histogram and the
size of the image and you can easily reconstitute
the image if and when you need it.

Cheers,

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

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		Re: Today's IDL Lesson By: David Fanning on Thu, 14 August 2008 13:27
		Re: Today's IDL Lesson By: d.rowenhorst@gmail.co on Thu, 14 August 2008 12:27
		Re: Today's IDL Lesson By: David Fanning on Tue, 19 August 2008 13:35

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