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A File Format for the Exchange of Images in the Internet (RFC1314)

IP.com Disclosure Number: IPCOM000002135D
Original Publication Date: 1992-Apr-01
Included in the Prior Art Database: 2000-Sep-12
Document File: 19 page(s) / 50K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

A. Katz: AUTHOR [+2]

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).

This text was extracted from a ASCII Text document.
This is the abbreviated version, containing approximately 6% of the total text.

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.

1. Introduction

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

an...