Painting over the ROI

[Daniel Lélis Baggio]

Hi,
I've been trying to make a plug in paint it's anchor points over the ROI
points.
I'm using a polygon Roi, like this:
**********
            Polygon p = new Polygon(selx,sely,size[0]+selSize);

            pRoi = new PolygonRoi(p,Roi.FREELINE);
            img.setRoi(pRoi);
            paintPoints();
***********
And selx and sely points to a vector of points of the selection.
But there are a few points of the selections that I store in another
ArrayList, and I wanted to highlight them.
To do this, I call the paintPoints() function, which is something like:
************************************
private void paintPoints() {
        ImageCanvas ic;
        ic = img.getCanvas();
        Graphics g = ic.getGraphics();
        g.setColor(Roi.getColor());
        for(int i=0;i<anchor.size();i++){
            int myx = (int) ((Point)(anchor.get(i))).getX();
            int myy = (int) ((Point)(anchor.get(i))).getY();

            g.drawRect(    ic.screenX(myx),
                        ic.screenY(myy),10,10);
        }
    }
}
****************************
The Rectangles are drawn on the desired points, but, somewhere in the code,
the repaint function is called, and they start to flicker, giving the user a
bad sensation.
Has anyone dealed with this problem in someplugin?
If so, what's the easiest way to go around it?
Thanks for your feedback.
[]'s

[Daniel Lélis Baggio]

Well, it seems that the best way around it is to extend the PolygonRoi class
and overide the draw method. Does Wayne agree with it?
Thanks OOP!
[]'s

[Robert Martin-3]

Hi,

I am wondering if anyone has written a plug-in to plot the average  
(of a region of interest) versus slice number; and, if so, how  
difficult would it be to do the same for other measurements (std  
deviation etc)?  Could these values be output to other programs as well?

Robert  Martin

[Wayne Rasband]

> I am wondering if anyone has written a plug-in to plot the average (of
> a region of interest) versus slice number; and, if so, how difficult
> would it be to do the same for other measurements (std deviation etc)?
>  Could these values be output to other programs as well?

The Image>Stacks>Plot Z-axis Profile command does this. Use the
Analyze>Set Measurements command to specify other measurements such as
standard deviation. Output the values to other programs by right
clicking on the Results window and selecting "Save As" or "Copy".

-wayne