[IPP] Registration template for "jpeg-features-supported (1setOf type2 keyword)"

[IPP] Registration template for "jpeg-features-supported (1setOf type2 keyword)"

[IPP] Registration template for "jpeg-features-supported (1setOf type2 keyword)"

Ira McDonald blueroofmusic at gmail.com
Wed Oct 21 23:50:05 UTC 2015


Hi Harry,

Thanks!  Very useful AFPC document.

Cheers,
- Ira


Ira McDonald (Musician / Software Architect)
Co-Chair - TCG Trusted Mobility Solutions WG
Chair - Linux Foundation Open Printing WG
Secretary - IEEE-ISTO Printer Working Group
Co-Chair - IEEE-ISTO PWG Internet Printing Protocol WG
IETF Designated Expert - IPP & Printer MIB
Blue Roof Music / High North Inc
http://sites.google.com/site/blueroofmusic
http://sites.google.com/site/highnorthinc
mailto: blueroofmusic at gmail.com
Winter  579 Park Place  Saline, MI  48176  734-944-0094
Summer  PO Box 221  Grand Marais, MI 49839  906-494-2434


On Wed, Oct 21, 2015 at 11:37 AM, Michael Sweet <msweet at apple.com> wrote:

> Harry,
>
> Thanks for this.  After reviewing the section on JPEG, it looks like the
> only keyword I haven't covered is 'hierarchical'.  The referenced document
> also includes some good information on how each of the features is
> implemented in JPEG...
>
>
> On Oct 21, 2015, at 11:10 AM, Harry.Lewis at ricoh-usa.com wrote:
>
> Hi Michael. I think the "jpeg-features-supported" attribute is a good idea
> and your registered keywords make sense. I don't know how useful anyone in
> the PWG will find this but, in the same wheelhouse, the AFPC has defined
> (print) "subsets" for several widely available formats TIFF, JPEG, PNG and
> SVG (not published yet). The AFP subset for JPEG was submitted to ISO in
> 2011 and became or formed the basis for *ISO/IEC 10918-6 Application to
> printing systems*
> <https://www.iso.org/obp/ui/#iso:std:iso-iec:10918:-6:ed-1:v1:en> now a
> published ISO standard. I'm not suggesting this intersects 100% with
> Apple's attributes but mention it as FYI in case you might find it helpful
> in general. It has been a while since ISO published and I don't recall what
> additions or changes may have occurred so persons really interested are
> advised to purchase the ISO standard. Meanwhile, the AFPC document is freely
> available
> <http://afpcinc.org/wp-content/uploads/2014/04/AFPC-Subsets-v2.0.pdf> and
> the PWG is free to reference the document if that ever makes sense.
>
> *Harry Lewis*
> AFPC President & Secretary
> Program Manager IP & Standards
> Phone: 720-663-3456
> e-mail: harry.lewis at ricoh-usa.com
> <Mail Attachment.gif>
>
>
>
> From:        Michael Sweet <msweet at apple.com>
> To:        ipp <ipp at pwg.org>
> Date:        10/21/2015 05:56 AM
> Subject:        [IPP] Registration template for "jpeg-features-supported
> (1setOf type2 keyword)"
> Sent by:        ipp-bounces at pwg.org
> ------------------------------
>
>
>
> All,
>
> Apple would like to register a new "jpeg-features-supported (1setOf type2
> keyword)" attribute for the purpose of describing the optional features
> that a Printer supports in the JPEG file interchange format (JFIF,
> image/jpeg MIME media type). The following keyword values will initially be
> registered:
>
> - 'none': The Printer only supports the baseline JFIF format; this keyword
> only appears by itself.
> - 'arithmetic': The Printer supports arithmetic encoding.
> - 'cmyk': The Printer supports CMYK images.
> - 'deep': The Printer supports more than 8 bits per component.
> - 'icc': The Printer supports embedded ICC profiles.
> - 'lossless': The Printer supports lossless JPEG encoding.
> - 'progressive': The Printer supports progressive encoding.
>
> The primary purpose of this attribute is to allow the Client to determine
> whether a JPEG file can be printed directly or must be converted to an
> alternate form (e.g. PWG Raster) prior to printing.  Because of the way
> many printers process JPEG files, some features (ICC and CMYK support in
> particular) are silently ignored if not supported, leading to incorrect
> output (otherwise we could look for a document-format error and retry...)
>
> ....
>
> Printer Description attributes:
>                                           Reference
> ------------------------------
>                                         ---------
> jpeg-features-supported (1setOf type2 keyword)
>                       [APPLE20151021]
>
>
> Attributes (attribute syntax)
>  Keyword Attribute Value
>                                   Reference
>  -----------------------
>                                   ---------
> jpeg-features-supported (1setOf type2 keyword)
>                       [APPLE20151021]
>  arithmetic
>                                                          [APPLE20151021]
>  cmyk
>
> [APPLE20151021]
>  deep
>
> [APPLE20151021]
>  icc
>
> [APPLE20151021]
>  lossless
>                                                        [APPLE20151021]
>  none
>
> [APPLE20151021]
>  progressive
>                                                          [APPLE20151021]
>
> _________________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>
> _______________________________________________
> ipp mailing list
> ipp at pwg.org
> https://www.pwg.org/mailman/listinfo/ipp
>
>
> _________________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>
>
> _______________________________________________
> ipp mailing list
> ipp at pwg.org
> https://www.pwg.org/mailman/listinfo/ipp
>
>
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