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xroi with regions_in problem [message #94851]

Tue, 07 November 2017 05:28

Mats Löfdahl
Messages: 263
Registered: January 2012

Senior Member

Hi,

I'm trying to use the regions_in keyword with xroi but it seems I can't make it work.

The purpose is to have a pre-defined region of interest, that the user can move or size scale in the GUI.

This call, without regions_in, works fine:

IDL> xroi, dispim, regions_out = roi, /block

But when I do

IDL> xroi, dispim, regions_in = [roi_in], regions_out = roi, /block

The display image (dispim) is not shown properly (I get just a black image) and the call is terminated with the error message:

IDLGRMODEL::ADD: Argument 1 should be of class type IDLgrModel or IDLgrGraphic or IDL_Container

If I repeat the call, the image is displayed nicely but I see no defined ROI in the ROI information window.

The roi_in object is created like this:

IDL> roi_in = OBJ_NEW('IDLanROI', X_in, Y_in)

where X_in and Y_in define a rectangle:

IDL> help,X_in,Y_in & print, X_in & print,Y_in
X_IN LONG = Array[4]
Y_IN LONG = Array[4]
35 65 65 35
35 35 65 65

The roi_in object at least passes the simplest of tests but could probably be wrong anyway:

IDL> roi_in -> getproperty, roi_xrange = xx & print, xx
35.000000 65.000000

I'm using regions_in = [roi_in] because the documentation says it should be an array but regions_in = roi_in gives the same error.

Any advice?

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[Message index]

		xroi with regions_in problem By: Mats Löfdahl on Tue, 07 November 2017 05:28
		Re: xroi with regions_in problem By: Mats Löfdahl on Tue, 07 November 2017 07:03
		Re: xroi with regions_in problem By: Helder on Wed, 08 November 2017 00:19
		Re: xroi with regions_in problem By: Mats Löfdahl on Wed, 08 November 2017 01:41

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