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java coding help - Polygon ROI

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Kenneth Sloan-2
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java coding help - Polygon ROI

Kenneth Sloan-2
Java plugin - I’m prompting the user to create POINT and POLYGON ROIs.

 For POINT ROI, this seems to work just fine:

     IJ.setTool("multipoint");
     WaitForUserDialog wfudOCT = new WaitForUserDialog("select three (3) landmarks in OCT; then click OK");
     wfudOCT.show();
     Roi octLMROI = octIPlus.getRoi();
     Polygon octLMPolygon = octLMROI.getPolygon();


But, for POLYGON ROI, this very similar code fails:
     IJ.setTool("polygon");
     WaitForUserDialog wfudOCT = new WaitForUserDialog("select Polygon in OCT; then click OK");
     wfudOCT.show();
     Roi octPolyROI = octIPlus.getRoi();
     Polygon octPolygon = octPolyROI.getPolygon();

In the second case, octPolyROI is null.  The user has drawn a polygon (and completed it) and then clicks on “OK” in the dialog box.  The polygon is displayed on the image (with the verticies minimized)


What am I doing wrong?

I do notice that there’s a difference in how the “multipoint” and “Polygon selections” are presented in the
ImageJ toolbar.

If it matters, this is running under FIJI, latest version.

--
Kenneth Sloan
[hidden email] <mailto:[hidden email]>
Vision is the art of seeing what is invisible to others.





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ctrueden
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Re: java coding help - Polygon ROI

ctrueden
Hi Kenneth,

I am unable to reproduce the faulty behavior on my system.

With the following Groovy script:

  import ij.IJ
  import ij.gui.WaitForUserDialog
  imp = IJ.openImage("http://imagej.net/images/blobs.gif")
  imp.show()
  IJ.setTool("polygon")
  new WaitForUserDialog("select Polygon in OCT; then click OK").show()
  roi = imp.getRoi()
  println("roi = " + roi)
  println("polygon = " + roi.getPolygon())

I see output like the following:

  roi = Roi[Polygon, x=68, y=34, width=142, height=152]
  polygon = java.awt.Polygon@452535bd

Is it possible the user is drawing in a different image than the one
referenced by your octIPlus?

Regards,
Curtis

--
Curtis Rueden
LOCI software architect - https://loci.wisc.edu/software
ImageJ2 lead, Fiji maintainer - https://imagej.net/User:Rueden
Did you know ImageJ has a forum? http://forum.imagej.net/


On Wed, Oct 25, 2017 at 5:35 PM, Kenneth Sloan <[hidden email]>
wrote:

> Java plugin - I’m prompting the user to create POINT and POLYGON ROIs.
>
>  For POINT ROI, this seems to work just fine:
>
>      IJ.setTool("multipoint");
>      WaitForUserDialog wfudOCT = new WaitForUserDialog("select three (3)
> landmarks in OCT; then click OK");
>      wfudOCT.show();
>      Roi octLMROI = octIPlus.getRoi();
>      Polygon octLMPolygon = octLMROI.getPolygon();
>
>
> But, for POLYGON ROI, this very similar code fails:
>      IJ.setTool("polygon");
>      WaitForUserDialog wfudOCT = new WaitForUserDialog("select Polygon in
> OCT; then click OK");
>      wfudOCT.show();
>      Roi octPolyROI = octIPlus.getRoi();
>      Polygon octPolygon = octPolyROI.getPolygon();
>
> In the second case, octPolyROI is null.  The user has drawn a polygon (and
> completed it) and then clicks on “OK” in the dialog box.  The polygon is
> displayed on the image (with the verticies minimized)
>
>
> What am I doing wrong?
>
> I do notice that there’s a difference in how the “multipoint” and “Polygon
> selections” are presented in the
> ImageJ toolbar.
>
> If it matters, this is running under FIJI, latest version.
>
> --
> Kenneth Sloan
> [hidden email] <mailto:[hidden email]>
> Vision is the art of seeing what is invisible to others.
>
>
>
>
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

--
ImageJ mailing list: http://imagej.nih.gov/ij/list.html
Kenneth Sloan-2
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Re: java coding help - Polygon ROI

Kenneth Sloan-2
Thanks for checking.  I’ll dig deeper, tomorrow.

I posted because I hit a brick wall, and am still uncertain enough about working from the API docs that  I thought there was a real possibility I had made an elementary mistake.

But…if the code looks right to you - then something else is going on.  Clearly, this is an excerpt from a much
larger program.

Again - thank you very much for verifying that this *should* work.

--
Kenneth Sloan
[hidden email] <mailto:[hidden email]>
Vision is the art of seeing what is invisible to others.




> On Oct 25, 2017, at 23:29 , Curtis Rueden <[hidden email]> wrote:
>
> Hi Kenneth,
>
> I am unable to reproduce the faulty behavior on my system.
>
> With the following Groovy script:
>
>  import ij.IJ
>  import ij.gui.WaitForUserDialog
>  imp = IJ.openImage("http://imagej.net/images/blobs.gif <http://imagej.net/images/blobs.gif>")
>  imp.show()
>  IJ.setTool("polygon")
>  new WaitForUserDialog("select Polygon in OCT; then click OK").show()
>  roi = imp.getRoi()
>  println("roi = " + roi)
>  println("polygon = " + roi.getPolygon())
>
> I see output like the following:
>
>  roi = Roi[Polygon, x=68, y=34, width=142, height=152]
>  polygon = java.awt.Polygon@452535bd
>
> Is it possible the user is drawing in a different image than the one
> referenced by your octIPlus?
>
> Regards,
> Curtis
>
> --
> Curtis Rueden
> LOCI software architect - https://loci.wisc.edu/software <https://loci.wisc.edu/software>
> ImageJ2 lead, Fiji maintainer - https://imagej.net/User:Rueden <https://imagej.net/User:Rueden>
> Did you know ImageJ has a forum? http://forum.imagej.net/ <http://forum.imagej.net/>
>
>
> On Wed, Oct 25, 2017 at 5:35 PM, Kenneth Sloan <[hidden email] <mailto:[hidden email]>>
> wrote:
>
>> Java plugin - I’m prompting the user to create POINT and POLYGON ROIs.
>>
>> For POINT ROI, this seems to work just fine:
>>
>>     IJ.setTool("multipoint");
>>     WaitForUserDialog wfudOCT = new WaitForUserDialog("select three (3)
>> landmarks in OCT; then click OK");
>>     wfudOCT.show();
>>     Roi octLMROI = octIPlus.getRoi();
>>     Polygon octLMPolygon = octLMROI.getPolygon();
>>
>>
>> But, for POLYGON ROI, this very similar code fails:
>>     IJ.setTool("polygon");
>>     WaitForUserDialog wfudOCT = new WaitForUserDialog("select Polygon in
>> OCT; then click OK");
>>     wfudOCT.show();
>>     Roi octPolyROI = octIPlus.getRoi();
>>     Polygon octPolygon = octPolyROI.getPolygon();
>>
>> In the second case, octPolyROI is null.  The user has drawn a polygon (and
>> completed it) and then clicks on “OK” in the dialog box.  The polygon is
>> displayed on the image (with the verticies minimized)
>>
>>
>> What am I doing wrong?
>>
>> I do notice that there’s a difference in how the “multipoint” and “Polygon
>> selections” are presented in the
>> ImageJ toolbar.
>>
>> If it matters, this is running under FIJI, latest version.
>>
>> --
>> Kenneth Sloan
>> [hidden email] <mailto:[hidden email]> <mailto:[hidden email] <mailto:[hidden email]>>
>> Vision is the art of seeing what is invisible to others.
>>
>>
>>
>>
>>
>> --
>> ImageJ mailing list: http://imagej.nih.gov/ij/list.html <http://imagej.nih.gov/ij/list.html>
>>
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html <http://imagej.nih.gov/ij/list.html>

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