static S uploadJPEGToImageServerIfNotThere(BufferedImage img, S name) {
  byte[] jpeg = toJPEG(img);
  S md5 = md5OfRGBImage(new RGBImage(imageFromByteArray(jpeg))); // take artifacts into account
  long id = imageServerCheckMD5(md5);
  if (id == 0)
    ret uploadToImageServer_new_jpg(jpeg, name);
  else
    ret "http://ai1.lol/images/raw/" + id;
}