hat compresses about 10% better than standard, but
      is considerably slower to decompress.  See jpegio.c.

    - PNG is the standard method for lossless compression
      of binary, grayscale and color images.  It is supported
      natively in all browsers, and uses a good open source
      compression library (zlib).  It is superior in almost every
      respect to GIF (which, until recently, contained proprietary
      LZW compression).  See pngio.c.

    - TIFF is a common interchange format, which 