Next meeting will be Friday March 21 at 10am Pacific.
Topics for March 14, 2003:
1) Media size. What limitations do we want to place on image width and
scaling?
Resolution: IPPFax: Paper size is unbounded in PFD/is. The Receiver
MAY scale down at most 10% (PDF/is may prohibit this scaling), overflow
to another page, or truncate. If the Receiver does truncate then it
must notify the Receiving user. The Receiving user MUST be able to
support A4/Letter at a minimum.
Crop boxes SHOULD be used when the producer knows that the imaginable
region is less than media size. If the crop box is the union of lesser
size of Letter and A4 minus ¼ of inch, then the producer can be sure
that the majority of consumers can print the image. However, this does
mean that there is the possibly that data may lost.
2) Page order. If the Producing device scans pages in a non-sequential
order (all page fronts first, then page backs, for example), how do we
want to indicate this (if at all) in the Document? Resolution: Add a new
keyword to the beginning of the PDF/is which would allow the Consumer to
modify its behavior. For example, if the Producer scans all the fronts
and then all backs, the keyword would allow the Consumer to print in
simplex (thereby allowing the User to reorder) or prompt the user to
reinsert the stack, upside down, so that the Consumer can print to the
back of the previously imaged pages. Each Page object will indicate
which page this object represents.
3) Rob: For today's meeting, I would like to add PDF/is "structuring" to
the agenda. The 's' in PDF/is means that all the objects needed to image
a page come together in the file, between the page object for one page
and the page object for the next. Beyond that, there is the exact order
of the resource, content, image, etc. objects for the page. The current
draft has a proposal, which I would like to discuss from the standpoint
of expectations of writer and reader behavior. (Rob: can you please send
your issues so that we many ponder the implications)
4) Sender-URI Stamps.
5) Coloring of attributes based on compression. (Resolutions)
Kari's issue: Resolution: Length SHOULD be before the image. Consumer
MUST be able to able to accept in either order. If the length is after
the image, then must add the ID key from the file trailer as a comment
after the length. Similar to mime methodology of determining end of
include. (This is only an issue when reading a doc that is up-version
and a new image format is unknown)
ToDo: Walk through references section and split into
Normative-v-Informative
OpenIssues: IP issues
-----Original Message-----
From: Gail Songer
Sent: Thursday, March 06, 2003 3:51 PM
To: ifx@pwg.org
Subject: IFX> Conf Call Summary
Next meeting is Friday March 14 at 10am
Summary:
Media Sizes supported. Width: Intersection of A4 and letter. Clip box ¼
inch in from each side. If won't fit on renderer's page, can scale
image (require isomorphic scaling) and must notify the receiving user.
--- What about length? In the Feb 25 call we had pondered not bounding
the length of a page an allowing the device to split the image across
pages.
Resolution: Require a min/max?
In the data - min and max in the data stream, not
discrete values, but ranges are ok. 300 pdi min. 1200 max.
On the output device - 300 min. No maximum.
Image must be +- a point of the original size. (not per
inch, per object)
Required ColorSpace(s) - Require the device to support sRGB and gray
gama 2.2; the sender can pick either of the two but MUST include the
profile in the pdf/is data stream
Only thing left to negotiate is buffer size....Just pick a size and then
not negotiate. Put a stake at 4meg and turn during interop.. Remove
memory size attribute
Still open:
Sender-URI Stamps.
Coloring of attributes based on compression. (Resolutions)
ToDo:
Walk through references section and split into
Normative-v-Informative
-----Original Message-----
From: Gail Songer
Sent: Tuesday, February 25, 2003 1:01 PM
To: 'ifx@pwg.org'
Subject: Conf Call Summary
Today's Conference Call Summary:
Drop Flate from list of pdfis-compressions-supported (this used to be
pdfis-profiles-supported)
Make Masking mandatory for the receiver.
Require both the sender and the receiver to support and use Banding.
Drop support for Tiling.
Color-space will be ICC with only the sRGP color profile. A pdfis
device wouldn't have to process the profile, but the inclusion of the
profile in the datastream would allow a PDF reader to process the
document.
Coloring by pdfis compression schemes:
No longer need the following attributes:
pdfis-compressions-supported (all compressions are required)
pdfis-color-spaces-supported (only one colorspace)
pdfis-data-encryption-supported (encryption types do not very based on
compression)
pdfis-cache-size-k-octets-supported (we will just pick a single required
number)
pdfis-orientation-supported - all images will be in landscape.
Still Open:
Media Sizes supported. Width: Intersection of A4 and letter.
Clip box ¼ inch in from each side. If won't fit in renderer, can scale
image (required isomorphic scaling) and must notifiy the receiving user.
Resolution: Require a min/max?
In the data - min and max in the data stream, not
discrete values, but ranges or ok. 300 pdi min. 1200 max.
On the output device - 300 min. No maximum.
Image must be +- a point of the original size. (not per
inch, per object)
Sender-URI Stamps.
Coloring of attributes based on compression. (Resolutions)
Required ColorSpace(s) - sRGB and gray gama 2.2
Only thing left to negotiate is buffer size....Just pick a size and then
not negotiate 4meg. No memory size attribute
ToDo:
Walk through references section and split into
Normative-v-Informative
This archive was generated by hypermail 2b29 : Fri Mar 14 2003 - 15:26:49 EST