RFC 1314 (rfc1314) - Page 1 of 23

A File Format for the Exchange of Images in the Internet

Alternative Format: Original Text Document
Next >
Network Working Group                                            A. Katz
Request for Comments: 1314                                      D. Cohen
                                                                     ISI
                                                              April 1992


        A File Format for the Exchange of Images in the Internet

Status of This Memo

   This document specifies an IAB standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "IAB
   Official Protocol Standards" for the standardization state and status
   of this protocol.  Distribution of this memo is unlimited.

Abstract

   This document defines a standard file format for the exchange of
   fax-like black and white images within the Internet.  It is a product
   of the Network Fax Working Group of the Internet Engineering Task
   Force (IETF).

   The standard is:

        ** The file format should be TIFF-B with multi-page files
           supported.  Images should be encoded as one TIFF strip
           per page.

        ** Images should be compressed using MMR when possible.  Images
           may also be MH or MR compressed or uncompressed.  If MH or MR
           compression is used, scan lines should be "byte-aligned".

        ** For maximum interoperability, image resolutions should
           either be 600, 400, or 300 dpi; or else be one of the
           standard Group 3 fax resolutions (98 or 196 dpi
           vertically and 204 dpi horizontally).

   Note that this specification is self contained and an implementation
   should be possible without recourse to the TIFF references, and that
   only the specific TIFF documents cited are relevant to this
   specification.  Updates to the TIFF documents do not change this
   specification.

   Experimentation with this file format specified here is encouraged.






Katz & Cohen
Next >