How to retrieve intensities of a ROI in App Designer

I have one picture (axContrast) in which i draw a cicular ROI and then plot af copy of that ROI onto another image (axFluor), here i would like to know the intensities inside the ROI, is that possible?

function ROIButtonPushed(app, event)
            ROIFunction(app)
            app.Roi = drawcircle(app.axContrast);
            app.RoiCenter = app.Roi.Center;
            app.RoiRadius = app.Roi.Radius;
            hold(app.axContrast,'on');
            app.RoiContrast = plot(app.axContrast,app.Roi.Vertices(:,1),app.Roi.Vertices(:,2),'LineStyle','--','LineWidth',2,'Color','r');
            hold(app.axContrast,'off');

  end
  
   if ~isempty(app.Roi) 
                app.Roi = images.roi.Circle(app.axContrast,'Center',app.RoiCenter,'Radius',app.RoiRadius);
                addlistener(app.Roi,'ROIMoved',@(src, eventdata)movedROI(src, eventdata, app));
                hold(app.axFluor,'on');
                app.RoiFluor = plot(app.axFluor,app.Roi.Vertices(:,1),app.Roi.Vertices(:,2),'LineStyle','--','LineWidth',2,'Color','r');
                hold(app.axFluor,'off');
   end 
   

Furthermore, for some reason the listener seem to not be working properly, so if antbody knows a solution that i also grately appreciated

Answer 1

[Image Analyst]

See attached demos for masking.