IFX Mail Archive: RE: IFX> FW: I-D ACTION:draft-ietf-fax-tif

IFX Mail Archive: RE: IFX> FW: I-D ACTION:draft-ietf-fax-tif

RE: IFX> FW: I-D ACTION:draft-ietf-fax-tiff-fx-extension1-01.txt [TIFF-FX extension Set1]

From: Hastings, Tom N (hastings@cp10.es.xerox.com)
Date: Fri Mar 16 2001 - 16:09:05 EST

  • Next message: Hastings, Tom N: "RESEND: IFX> FW: I-D ACTION:draft-ietf-fax-tiff-fx-extension1-01. txt [TIFF-FX extension Set1]"

    The Internet Fax WG is meeting at the IETF meeting next Monday, March 19.

    The IPP FAX UIF (Universal Image Format) standard is using TIFF/FX. It
    would be good to get any additional features into TIFF/FX itself that IPP
    FAX needs.

    Therefore, ASAP members of the IPP FAX group could send additional
    requirements for the TIFF/FX extension work outlined below to the Internet
    FAX (IFAX) WG using their DL:


    (and cc to the ifx@pwg.org)

    Possible additional requirements:

    a. additional image resolutions, or are the resolutions already in the
    TIFF-FX Extension Set 1 document sufficient (see mail note below)?

    b. means to specify the media size by dimensions, instead of by name,
    possibly using the new PWG Media Size string which has both name and two
    dimensions in it, i.e., 'na-letter.8500-11000', 'iso-a4.2100-2970',
    'na-custom-long-and-narrow.6000-14000' and 'custom-xyz.2000-3000'

    c. additional color spaces, besides CIELAB. Possibilities include:

    For Grayscale Images: Sample values in a grayscale (single-component) JPEG
    image shall be converted to the sRGB color space by setting

       Rout= Gout = Bout = Grayin

    For Color Images: Sample values in 3-component JPEG images shall be
    interpreted as YCbCr samples, as would be obtained by applying the matrices
    described in ITU BT.601 to sRGB input data.


    -----Original Message-----
    From: McIntyre, Lloyd [mailto:Lloyd.McIntyre@pahv.xerox.com]
    Sent: Wednesday, March 07, 2001 17:34
    To: 'PWG - IPPFax DL'; 'PWG - Don Wright (Chair)'
    Subject: IFX> FW: I-D ACTION:draft-ietf-fax-tiff-fx-extension1-01.txt

    Below is the IETF's announcement notice for the second draft of the first
    extension set for TIFF-FX. This extension, TIFF-FX Extension Set 1, focuses
    on introduction of the new JBIG2 encoding for B&W and colored text, see
    sections E1.5, E1.6 and E1.7. JBIG2 provides 3 to 5x compression advantage
    over G4 (MMR) and JBIG encodings. The extension also introduces a set of new
    higher resolutions (e.g. 300x600, 400x800, 600x600, 600x1200 and 1200x1200
    dpi) and associated image widths (section E1.3), provisions use more than 3
    layers in MRC model of Profile M (section E1.4), and provision to signal
    when more than one profile is being used within a file (section E1.2).

    Please review and submit your comments on the IETF IFax Working Group dl at


    -----Original Message-----
    From: Internet-Drafts@ietf.org [mailto:Internet-Drafts@ietf.org]
    Sent: Tuesday, March 06, 2001 3:51 AM
    Cc: ietf-fax@imc.org
    Subject: I-D ACTION:draft-ietf-fax-tiff-fx-extension1-01.txt

    A New Internet-Draft is available from the on-line Internet-Drafts
    This draft is a work item of the Internet Fax Working Group of the IETF.

            Title : TIFF-FX Extensions 1
            Author(s) : L. McIntyre, D. Abercrombie, W. Rucklidge, R.
            Filename : draft-ietf-fax-tiff-fx-extension1-01.txt
            Pages : 62
            Date : 05-Mar-01
    This document is an Internet draft for extensions to TIFF-FX
    [RFC XXXX], extension set 1.

    A URL for this Internet-Draft is:

    Internet-Drafts are also available by anonymous FTP. Login with the username
    "anonymous" and a password of your e-mail address. After logging in,
    type "cd internet-drafts" and then
            "get draft-ietf-fax-tiff-fx-extension1-01.txt".

    A list of Internet-Drafts directories can be found in
    or ftp://ftp.ietf.org/ietf/1shadow-sites.txt

    Internet-Drafts can also be obtained by e-mail.

    Send a message to:
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