A File Format for the Exchange of Images in the Internet (RFC1314)
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2019-Feb-11
Internet Society Requests For Comment (RFCs)
A. Katz: AUTHOR [+1]
This document defines a standard file format for the exchange of fax- like black and white images within the Internet. [STANDARDS-TRACK]
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.
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 [Page 1]
RFC 1314 Image Exchange Format April 1992
The purpose of this document is to define a standard file format for exchange of black and white images using the Internet. Since many organizations have already started to accumulate and exchange scanned documents it is important to reach agreement about an interchange file format in order to promote and facilitate the exchange and distribution of such documents. These images may originate from scanners, software, or facsimile (fax) machines. They may be manipulated by software, communicated, shared, duplicated, displayed, printed by laser printers, or faxed.
This file format provides for the uniform transfer of high quality images at a reasonable cost and with reasonable speed whether these files are generated by scanners, totally by software (e.g., text-to- fax, bitmap-to-fax, OCR, etc), or by fax. Also the intent of this document is to remain compatible with future moves to multi-level (i.e., gray-scale), higher resolution, or color images. The format proposed here is supported by both commercially available hardware and commercial and public domain software for most popular platforms in current use.
The file format for images is a totally separate issue from how such files are to be communicated. For example, FTP or SMTP could be used to move an image file from one host to another, although there are complications in the use o...