Question on AND,OR,XOR functions in ROI Manager

[Jason Miller]

Hi all-

I am going through the ImageJ guide in a systematic way as a beginner and
came across unexpected behavior. If I have multiple selections in the ROI
manager and then select More->AND (or OR or XOR), no new ROI with the newly
combined ROI appears (let's call it ROI XOR). If I hit update, then the ROI
at the top of the list of ROI's I had selected is replaced by the new,
combined ROI XOR. But the only way I can get the ROI XOR to appear is by
updating it over one of the original ROI's. Further, if I have no ROI
selected, the ImageJ manual suggests all the ROI's will be used for the
AND/OR/XOR operation, but because I don't then have a specific ROI
highlighted, when I click update, nothing happens (understandably, since I
haven't highlighted an ROI), which means the new ROI XOR doesn't appear. Is
this expected behavior? The way the manual reads, I was expecting the new
ROI XOR to appear as a new ROI in the ROI manager, but it doesn't.

I'm using Fiji with ImageJ 1.50b, running on Windows (32 bit - my old
crappy laptop).

Thanks for the insight
-Jason

-------

Jason Miller, MD, PhD

University of Michigan Kellogg Eye Center


Home address:

117 Worden Ave

Ann Arbor, MI 48103

Cell: [phone]

E-mail: *[hidden email] <[hidden email]>*


"When I was 5 years old, my mother always told me that happiness was the
key to life. When I went to school, they asked me what I wanted to be when
I grew up. I wrote down, 'Happy.' They told me I didn't understand the
assignment. I told them they didn't understand life." - John Lennon

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[gankaku]

Hi Jason,

if you hit the "Add" button or use the keyboard shortcut [t] then you will
add a new entry for the combined ROIs (for all three of those boolean
functions). This is what you most likely expect to achieve.

This is because the update function needs an existing ROI (which then
obviously needs to be selected that IJ knows which one you want to update)
which can be renewed.
The "Add" function adds a new selection to the manager and since your AND,
OR, XOR functions create a new selection you need to add it separately.

Hope this helps in answering your question.
Kind regards,
Jan

2015-09-25 3:29 GMT+02:00 Jason Miller <[hidden email]>:

> Hi all-
>
> I am going through the ImageJ guide in a systematic way as a beginner and
> came across unexpected behavior. If I have multiple selections in the ROI
> manager and then select More->AND (or OR or XOR), no new ROI with the newly
> combined ROI appears (let's call it ROI XOR). If I hit update, then the ROI
> at the top of the list of ROI's I had selected is replaced by the new,
> combined ROI XOR. But the only way I can get the ROI XOR to appear is by
> updating it over one of the original ROI's. Further, if I have no ROI
> selected, the ImageJ manual suggests all the ROI's will be used for the
> AND/OR/XOR operation, but because I don't then have a specific ROI
> highlighted, when I click update, nothing happens (understandably, since I
> haven't highlighted an ROI), which means the new ROI XOR doesn't appear. Is
> this expected behavior? The way the manual reads, I was expecting the new
> ROI XOR to appear as a new ROI in the ROI manager, but it doesn't.
>
> I'm using Fiji with ImageJ 1.50b, running on Windows (32 bit - my old
> crappy laptop).
>
> Thanks for the insight
> -Jason
>
> -------
>
> Jason Miller, MD, PhD
>
> University of Michigan Kellogg Eye Center
>
>
> Home address:
>
> 117 Worden Ave
>
> Ann Arbor, MI 48103
>
> Cell: [phone]
>
> E-mail: *[hidden email] <[hidden email]
> >*
>
>
> "When I was 5 years old, my mother always told me that happiness was the
> key to life. When I went to school, they asked me what I wanted to be when
> I grew up. I wrote down, 'Happy.' They told me I didn't understand the
> assignment. I told them they didn't understand life." - John Lennon
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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