Re: ROI type and ROI Manager

Posted by William O'Connell-3 on Aug 04, 2008; 6:10pm
URL: http://imagej.273.s1.nabble.com/ROI-type-and-ROI-Manager-tp3695459p3695461.html

Thanks wayne,

I was using the following code rather than  RoiManager.getInstance(), but
they give the same results. Only one instance of RoiManager can be open,
yes?

public class RoiManager_Test implements PlugIn {

     public void run(String arg) {
          RoiManager manager = (RoiManager)findOpenNonImageFrame("ROI");
//          RoiManager manager = RoiManager.getInstance();
          if(manager==null) {
            IJ.error("can't find ROI Manager!");
            return;
          }

        Roi[] rois = manager.getRoisAsArray();
    for(int r=0; r<rois.length; r++) {
    PolygonRoi roi = (PolygonRoi)rois[r];
    IJ.log("Roi " + r + " type is " + roi.getType());
                  IJ.log(roi.toString());
    }

    }


        Frame findOpenNonImageFrame(String sub) {
           Frame fr;
           Frame[] nonIm = WindowManager.getNonImageWindows();
           if(nonIm == null) return null;
           for(int id=0; id<nonIm.length; id++) {
              fr = nonIm[id];
              String s = fr.getTitle();
              IJ.log(s);
              int k = s.indexOf(sub);
              if(k >= 0) return fr;
              }
           return null;
        }


}


On Sun, Aug 3, 2008 at 9:01 AM, Rasband Wayne <[hidden email]> wrote:

> Dear listers,
>>
>> I have a plugin which fits edges to objects in a stack of images. The edge
>> points  are saved as PolygonRois(type 2) in an RoiManager.  I retrieve the
>> ROIs in another Plugin with the getRoisAsArray() command. But the ROIs are
>> now type 4, TRACE_ROIs.  I want to retrieve the coordinate points, but the
>> getXCoordinates() and getYCoordinates() are not supported.
>> I welcome any suggestions.
>> Bill O'Connell
>>
>
>
> ROIs returned by getRoisAsArray() have the original types. When I add
> rectangular, oval, polygon and traced ROIs to the ROI Manager and run (using
> the editor's Macros>Evaluate JavaScript command) this JavaScript code
>
>    importClass(Packages.ij.plugin.frame.RoiManager);
>    manager = RoiManager.getInstance();
>    rois = manager.getRoisAsArray();
>    for (i=0; i<rois.length; i++)
>        print(rois[i].getName()+": "+rois[i].getType());
>
> I get
>
>   0067-0104: 0
>   0077-0223: 1
>   0251-0159: 2
>   0383-0359: 4
>
> In any case, getXCoordinates() and getYCoordinates() work with type 4
> (traced) ROIs.
>
>    importClass(Packages.ij.plugin.frame.RoiManager);
>    manager = RoiManager.getInstance();
>    rois = manager.getRoisAsArray();
>    roi = rois[3];
>    print("type: "+roi.getType());
>    n= roi.getNCoordinates();
>    x = roi.getXCoordinates();
>    y = roi.getYCoordinates();
>    bounds = roi.getBounds();
>    for (i=0; i<n; i++)
>        print((bounds.x+x[i])+", "+(bounds.y+y[i]));
>
> It is easier, however, to use the getPolygon() method
>
>    importClass(Packages.ij.plugin.frame.RoiManager);
>    manager = RoiManager.getInstance();
>    rois = manager.getRoisAsArray();
>    roi = rois[3];
>    print("type: "+roi.getType());
>    p = roi.getPolygon();
>    for (i=0; i<p.npoints; i++)
>        print(p.xpoints[i]+", "+p.ypoints[i]);
>
> This is what the code looks like in Java
>
>    RoiManager manager = RoiManager.getInstance();
>    Roi[] rois = manager.getRoisAsArray();
>    Roi roi = rois[3];
>    IJ.log("type: "+roi.getType());
>    Polygon p = roi.getPolygon();
>    for (int i=0; i<p.npoints; i++)
>        IJ.log(p.xpoints[i]+", "+p.ypoints[i]);
>
> -wayne
>