addition of line location to measurements in imagej

[Gwen Barnes]

Hi,

For my research, studying impact processes on Earth's Moon, I'm measuring
the size of lots of boulders using ImageJ.  At the time (and I think still?)
ImageJ will measure the length of a line, but it doesn't record the position
of that line within the image.  When I started doing this project I made a
few tweaks to ImageJ so it would tell me the x-y location in pixels of the
center of each line I measured.  I'm wondering if this feature can be
incorporated into imagej.  If the source code I've been using (that's based
on a 3 year old version of imagej) would help I'd be happy to send it in.

I probably should have sent this email years ago, but I'm hoping it's better
late than never.  Also, if this is the wrong place to ask about this, could
someone please point me to where this email should go.  Thanks.

--
          -Gwen

[Jerome Mutterer]

Hi Gwen,

you can record line center with the following macro. It will measure  
the line, and then gets the center's coordinates.It uses values from  
"Bounding Rectangle", a measurement you can select from the  
Analyse/Set Measurements... dialog described at
http://rsb.info.nih.gov/ij/docs/menus/analyze.html#set

Jerome.


macro "line center measure [F1]" {
run ("Measure");
n=nResults-1;
setResult("xLineCenter",n,getResult("BX",n)+getResult("Width",n)/2);
setResult("yLineCenter",n,getResult("BY",n)+getResult("Height",n)/2);
updateResults();
}



Quoting Gwen Barnes <[hidden email]>:

> Hi,
>
> For my research, studying impact processes on Earth's Moon, I'm measuring
> the size of lots of boulders using ImageJ.  At the time (and I think still?=
> )
> ImageJ will measure the length of a line, but it doesn't record the positio=
> n
> of that line within the image.  When I started doing this project I made a
> few tweaks to ImageJ so it would tell me the x-y location in pixels of the
> center of each line I measured.  I'm wondering if this feature can be
> incorporated into imagej.  If the source code I've been using (that's based
> on a 3 year old version of imagej) would help I'd be happy to send it in.
>
> I probably should have sent this email years ago, but I'm hoping it's bette=
> r
> late than never.  Also, if this is the wrong place to ask about this, could
> someone please point me to where this email should go.  Thanks.
>
> --
>           -Gwen
>