/**
  * Updates this stack so its attributes, such as min, max, calibration table and color model, are
  * the same as 'ip'.
  */
 public void update(ImageProcessor ip) {
   if (ip != null) {
     min = ip.getMin();
     max = ip.getMax();
     cTable = ip.getCalibrationTable();
     cm = ip.getColorModel();
   }
 }