| Image Object ROI selection [message #12578] |
Wed, 26 August 1998 00:00 |
Randy Sloan
Messages: 1
Registered: August 1998
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Junior Member |
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Greetings. I'm new to this news group and IDL programming so hopefully
I won't bore you all with bone-headed questions (I know you do too).
I'm trying to update an old MRI image analysis program that was written
for pre-5.0 IDL. I'd like to use object graphics as much as possible,
but can't figure out if there is a way to select ROI's of an image
object. Data picking will give me one point, but I need the ability to
select polygon, square, and circle ROI's of an image. The CW_DEFROI and
DEFROI procedures don't like the draw widget since it seems to be
treated as an object itself (with the graphics_level set to 2).
Any thoughts or do I just need to grin and bear it and create a regular
draw widget for my ROI selection?
Thanks.
---------------------------------
How long is this Beta guy going to keep testing our stuff?
Randy Sloan
Box 1290
#1 Irving Street
UCSF, MRSC Rm AC109
San Francisco, CA 94143-1290
(t) 415-476-1910 (f) 415-476-8809
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| Re: Image Object ROI selection [message #12726 is a reply to message #12578] |
Wed, 26 August 1998 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Randy Sloan (jrsloan@mrsc.ucsf.edu) writes:
> I'm trying to update an old MRI image analysis program that was written
> for pre-5.0 IDL. I'd like to use object graphics as much as possible,
> but can't figure out if there is a way to select ROI's of an image
> object. Data picking will give me one point, but I need the ability to
> select polygon, square, and circle ROI's of an image. The CW_DEFROI and
> DEFROI procedures don't like the draw widget since it seems to be
> treated as an object itself (with the graphics_level set to 2).
You are going to have to write you own. I recommend using
a PolyLine object in conjunction with widget events. This
would allow you to easily write an Object DEFROI for yourself.
As it happens I am getting together starting tomorrow with
two other hotshot IDL programmers. (Well, *they* are hotshot
IDL programmers. I try to come up with a few good ideas. :-) )
Three computers, three days of object graphics programming,
one room. The idea is to see if we can use some IDL synergy
to get a start on some programs for a shareware library.
This is a great idea for the kind of object functionality
we want to write. I'll let you know.
Cheers,
David
----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438, Toll-Free Book Orders: 1-888-461-0155
Coyote's Guide to IDL Programming: http://www.dfanning.com/
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