w = 1024;
  h = 1024
  dir1 = getDirectory("Choose Source Directory ");
  dir2 = getDirectory("Choose Destination Directory ");
  list = getFileList(dir1);
  setBatchMode(true);
  for (i=0; i<list.length; i++) {
     showProgress(i+1, list.length);
     open(dir1+list[i]);
     run("Canvas Size...", "width=&w height=&h position=Center zero");
     saveAs("tiff", dir2+list[i]);
     close();
  }