public void run(ImageProcessor ip) {
   if (canceled) return;
   slice++;
   if (imp.getStackSize() > 1 && processStack) imp.setSlice(slice);
   if (imp.getType() == ImagePlus.COLOR_RGB) {
     ip = (ImageProcessor) imp.getProperty("Mask");
     ip.setThreshold(255, 255, ImageProcessor.NO_LUT_UPDATE);
   }
   if (!analyze(imp, ip)) canceled = true;
   if (slice == imp.getStackSize()) {
     imp.updateAndDraw();
     if (saveRoi != null) imp.setRoi(saveRoi);
   }
 }