how to use EllipseFitter?

[jiajian shen]

*Dear All,*
**
*Sorry to bother.  I want to fit an ellipse and draw it to my ROI.  I found
that there is a EllipseFitter class.  But it is not in the menu of ImageJ.
Anyone knows how to run EllipseFitter in a macro, if I have chose the ROI
with XCoordinates and YCoordinates?  I am looking for some macro like
**run("EllipseFitter",
xarr,yarr);, but it does not work.  *
**
*The EllipseFitter only works for closed ROI.  For a set of (xarr,yarr), how
to fit an ellipse if the points are discrete?  *
**
*Thanks a lot,*
*Jiajian*

[Wayne Rasband]

Run the Edit>Selection>Fit Ellipse command to fit the ellipse. Here is
an example:

     newImage("Test", "RGB White", 400, 400, 1);
     makePolygon(22,143,215,32,292,68,195,132,175,208);
     setForegroundColor(0,0,0);
     run("Draw");
     run("Fit Ellipse");
     run("Draw");
     run("Select None");

-wayne

On Dec 7, 2007, at 11:56 AM, jiajian shen wrote:

> *Dear All,*
> **
> *Sorry to bother.  I want to fit an ellipse and draw it to my ROI.  I
> found
> that there is a EllipseFitter class.  But it is not in the menu of
> ImageJ.
> Anyone knows how to run EllipseFitter in a macro, if I have chose the
> ROI
> with XCoordinates and YCoordinates?  I am looking for some macro like
> **run("EllipseFitter",
> xarr,yarr);, but it does not work.  *
> **
> *The EllipseFitter only works for closed ROI.  For a set of
> (xarr,yarr), how
> to fit an ellipse if the points are discrete?  *
> **
> *Thanks a lot,*
> *Jiajian*
>