ui/src/main/java/ucar/nc2/ui/image/PicturePane.java
public void centerImage() {
		if (sclPic.getOriginalImage() != null) {
			setCenterLocation((int) sclPic.getOriginalWidth() / 2, (int) sclPic.getOriginalHeight() / 2);
			repaint();
		}
 }
public void centerImage() {
		if (sclPic.getOriginalImage() != null) {
			setCenterLocation((int) sclPic.getOriginalWidth() / 2, (int) sclPic.getOriginalHeight() / 2);
			repaint();
		}
 }
Set image to center of panel by putting the coordinates of the middle of the original image into the
Center to X and Center to Y varaibles by invoking the setCenterLoaction method.
This method
calls <code>repaint()</code> directly since no time consuming image operations need to take place.