specify center and radius of circular ROI

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specify center and radius of circular ROI

Aryeh Weiss
Is there an option to specify a circular ROI by clicking clicking on the
center and then drawing a radius?
I remember seeing it on the list in the past, but I was unable to find
it in a search.

Thanks in advance
--aryeh

--
Aryeh Weiss
Faculty of Engineering
Bar Ilan University
Ramat Gan 52900 Israel

Ph:  972-3-5317638
FAX: 972-3-7384051


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Re: specify center and radius of circular ROI

anusuya pal
Hello,

One way I know is to measure the centroid of the given circular ROI, which
will give the  X,Y coordinates. Then place the point tool at the point
having those coordinates and to add in ROI manager. Make sure you check
'show all' option. Then you can easily draw the radius from that point by
line selection.

I don't know if there is any better way to do it, but this is how I do it.

Thanks
Anu

On 27-Feb-2018 8:43 AM, "Aryeh Weiss" <[hidden email]> wrote:

> Is there an option to specify a circular ROI by clicking clicking on the
> center and then drawing a radius?
> I remember seeing it on the list in the past, but I was unable to find it
> in a search.
>
> Thanks in advance
> --aryeh
>
> --
> Aryeh Weiss
> Faculty of Engineering
> Bar Ilan University
> Ramat Gan 52900 Israel
>
> Ph:  972-3-5317638
> FAX: 972-3-7384051
>
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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Re: specify center and radius of circular ROI

Jan Eglinger
In reply to this post by Aryeh Weiss
How about using the Oval selection tool while holding Ctrl and Shift at
the same time?

See also:
https://imagej.net/docs/guide/146-19.html#sub:Oval-Selection-Tool

Cheers
Jan


On 27.02.2018 14:29, Aryeh Weiss wrote:
> Is there an option to specify a circular ROI by clicking clicking on the
> center and then drawing a radius?
> I remember seeing it on the list in the past, but I was unable to find
> it in a search.
>
> Thanks in advance
> --aryeh
>

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Re: specify center and radius of circular ROI

Aryeh Weiss
Thank you -- that is exactly what I was looking for , and missed.

Thanks also to Anusuya Pal for answering.

Best regards,
--aryeh

On 27/02/2018 16:15, Jan Eglinger wrote:

> How about using the Oval selection tool while holding Ctrl and Shift
> at the same time?
>
> See also:
> https://imagej.net/docs/guide/146-19.html#sub:Oval-Selection-Tool
>
> Cheers
> Jan
>
>
> On 27.02.2018 14:29, Aryeh Weiss wrote:
>> Is there an option to specify a circular ROI by clicking clicking on
>> the center and then drawing a radius?
>> I remember seeing it on the list in the past, but I was unable to
>> find it in a search.
>>
>> Thanks in advance
>> --aryeh
>>
>

--
Aryeh Weiss
Faculty of Engineering
Bar Ilan University
Ramat Gan 52900 Israel

Ph:  972-3-5317638
FAX: 972-3-7384051

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html