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Re: Extracting ROI without IDL objects is it possible [message #37728 is a reply to message #37727]

Thu, 22 January 2004 08:33

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

Nuno Oliveira writes:

> I'm having a little trouble with extracting ROI with IDL. I'm trying to make
> a little application for temporary use while I don't learn how to manage
> IDLanROI objects.

You will be MILES ahead if you give up on CW_DEFROI and learn
to write your own ROI tool:

http://www.dfanning.com/widget_tips/line_on_image.html

What you want are the points that describe the ROI polygon,
not the pixel indices of the pixels inside the ROI.

If you HAD to use CW_DEFROI for some reason (your Internet
connect to my web page was broken, for example) you could
use Find_Boundary to recover the points on the boundary of
your ROI:

http://www.dfanning.com/programs/find_boundary.pro

Then, you could just plot these boundary points with PLOTS
right on top of your image.

Cheers,

David
--
David W. Fanning, Ph.D.
Fanning Software Consulting, Inc.
Phone: 970-221-0438, E-mail: david@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155

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[Message index]

		Re: Extracting ROI without IDL objects is it possible By: Bruce Bowler on Thu, 22 January 2004 11:20
		Re: Extracting ROI without IDL objects is it possible By: Nuno Oliveira on Thu, 22 January 2004 09:12
		Re: Extracting ROI without IDL objects is it possible By: David Fanning on Thu, 22 January 2004 08:33
		Re: Extracting ROI without IDL objects is it possible By: David Fanning on Thu, 22 January 2004 12:17

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