How is ImageJ creating Roi's?

[Maximilian Loy]

Hello,
 
I am working on an thermal images analysing-application (no ImageJ plugin).
 
The image is processed as ImagePlus object and displayed with "myImage.show()".
I have already implemented LUT, rotate and zoom but i wasn't able to get the different kinds of ROI to work.
The problem must be, that i have no ImageJ-toolbar, so the selected Roi can't be prompted the usual way.
 
I was looking at the ImageCanvas class but couldn't find out how ImageJ gets the selected Roi.
 
Maybe someone could give me a hint where to look!
 
Thanks in advance,
Maximilian Loy

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[Ludgate, David]

There is a setRoi method in the ImageProcessor class (or ImagePlus?), and you can manually make a variety of Rois using the various Roi subclasses. For a totally non-geometric Roi, the wand tool works well.

-----Original Message-----
From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Maximilian Loy
Sent: Thursday, August 25, 2005 9:01 AM
To: [hidden email]
Subject: How is ImageJ creating Roi's?


Hello,
 
I am working on an thermal images analysing-application (no ImageJ plugin).
 
The image is processed as ImagePlus object and displayed with "myImage.show()".
I have already implemented LUT, rotate and zoom but i wasn't able to get the different kinds of ROI to work.
The problem must be, that i have no ImageJ-toolbar, so the selected Roi can't be prompted the usual way.
 
I was looking at the ImageCanvas class but couldn't find out how ImageJ gets the selected Roi.
 
Maybe someone could give me a hint where to look!
 
Thanks in advance,
Maximilian Loy

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[Maximilian Loy]

Hi all,

I would like to extend the PointPicker plugin with a OvalRoi.
I know how to create a new Roi and was looking alot into the Roi classes.

Do I have to derive the OvalRoi class and make grow() public?
How can i move the Roi after i have created it?

Please help me out!

Thanks
Max

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