dir1 = getDirectory("Choose Source Directory ");
  dir2 = getDirectory("Choose Destination Directory ");
  setBatchMode(true);
  list = getFileList(dir1);
  for (i=0; i<list.length; i++) {
     open(dir1+list[i]);
     // process image
     saveAs("tif", dir2+list[i]);
     run("Close All");
  }