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Re: is there a 3D equivalent of CONTOUR? [message #68246 is a reply to message #68240]

Thu, 08 October 2009 02:11

dorthe
Messages: 12
Registered: April 2007

Junior Member

On Oct 7, 9:05 am, David Fanning <n...@dfanning.com> wrote:
> Dorthe Wildenschild writes:
>> I'm trying to use the ComputeGeometry function in 3 dimensions, but to
>> define my ROI, I need to outline (contour, or at least that's how I do
>> it 2D) my objects - and they're 3D. Any suggestions out there?
>
> ISOSURFACE?
>
> Cheers,
>
> David
>
> --
> David Fanning, Ph.D.
> Coyote's Guide to IDL Programming (www.dfanning.com)
> Sepore ma de ni thui. ("Perhaps thou speakest truth.")

excellent, - but I can't get it to work.. not very good at working
with objects I'm afraid - I do it once every 3 years or so :-)

Here's what I do:

I use LABEL_REGION to separate all the objects in my image and then I
pick one in a loop structure, representing "t" below

ISOSURFACE, label_image,
t, Outverts, Outconn
; print, outverts
Roi=Obj_New('IDLanROI', Outverts, type=2)

Status = Roi-> ComputeGeometry(Area=area,Perimeter=perimeter,
Centroid=centroid)

t_perimeter(r)=perimeter
t_area(r-1)=area
t_x_center(r)=centroid[0]
t_y_center(r)=centroid[1]
blob_siz(r)=blob_size[1]

I get lots of values in Outverts, but area, perimeter etc. are all
zero?
Any ideas for the slightly incompetent...?

BTW, nice to see you're still very active on this site.
Dorthe

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[Message index]

		Re: is there a 3D equivalent of CONTOUR? By: David Fanning on Thu, 08 October 2009 06:50
		Re: is there a 3D equivalent of CONTOUR? By: dorthe on Thu, 08 October 2009 02:11
		Re: is there a 3D equivalent of CONTOUR? By: David Fanning on Wed, 07 October 2009 09:05
		Re: is there a 3D equivalent of CONTOUR? By: dorthe on Tue, 13 October 2009 03:02

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