[MFD] RE: Print (mark) content Region definition

[MFD] RE: Print (mark) content Region definition

[MFD] RE: Print (mark) content Region definition

William Wagner wamwagner at comcast.net
Fri May 15 16:58:07 UTC 2009


OK, I delved further into the Production Printing Attributes document. At
least to a non Production Printing person, these are arcane attributes but
do correspond to  elements that we have in the model. 

 

At first look I was  interpreting "Image" as Content Area. But  positioning
the image first must consider the concepts of Finished-Page-Image Cell and
Imposition.  Since the Finished-Page-Image Cell  is defined as the region on
the surface of a sheet where the Finished-Page Image is placed, maybe this
is the Content Region? Reading further,  "When imposition is not applied,
the Finished-Page-Image Cell coincides with the entire surface of one side
of the sheet. When imposition is applied, a) the sheet is partitioned into
multiple non-overlapping Finished-Page-Image Cells, typically in a
rectangular grid, and b) the area near the edges of the sheet may not belong
to any Finished-Page-Image Cell." So the Finished-Page-Image Cell in one
case is the entire sheet surface (and does not consider engine margins) and
in the other case is a grid used for addressing the placement of the image. 

 

So "Image"  (or Finished-Page Image) is what is positioned and  may
correspond to Content Region. Except the "image" attributes appear to only
position the image, with the coordinate system for the Image Shifting
attributes being relative to the Finished-Page-Image Cell.  That is, the
dimensions of the image are determined by the PDL (and, realistically,
limited by the margins). 

 

Even the positioning (or "shifting") of the image is not a simple question
of x and y offset.

 

". the Printer first positions the Finished-Page Image [I assume relative to
the origin of an identified Finished-Page-Image Cell ] using the values it
obtains for the "x-image-position" and "y-image-position" attributes. Then
it shifts the Finished-Page Image by the amount it obtains for the
"x-image-shift" and "y-image-shift" attributes. Finally, for a Finished-Page
Image that would be placed on the front side of a sheet in the Finished
Document, it shifts the Finished-Page Image by the amount it obtains for the
"x-side1-image-shift" and "y-side1-image-shift". For a Finished-Page Image
that would be placed on the back side of a sheet in the Finished Document,
it shifts the Finished-Page Image by the amount it obtains for the
"x-side2-image-shift" and "y-side2-image-shift" attributes"

 

Bottom line, for the MFD overall, the questions are:


1.     Margins are defined relative to the media edges, and the content
region cannot extend into the margin areas (if the content that would occur
in those areas  is to be printed.) However, Margins are device (or subunit)
elements, not Service elements . Therefore,  should these be discussed under
Scan and Marker Subunit Media Content Coordinates?


2.     Do we want to define the coordinate system for Services using "Mark"
or "Print"? The elements:

a.     ImpositionTemplate

b.     XImagePosition

c.     XImageShift

d.     XSide1ImageShift

e.     XSide2ImageShift

f.      YImagePosition

g.     YImageShift

h.     YSide1ImageShift

are included in the model, and perhaps we need to define them and the
coordinate system which they utilize. Certainly we need to distinguish the
marking origin as the NW corner of the Media.

 

3.     The MFD model has "Scan Region" and "Copy Region" elements, but no
Content Region. Are we going to change that? The elements above are defined
at the same level as Scan Region, not as subelements of a Mark Region
element (otherwise known as the Finished-Page Image). Also, the Mark Region
can be shifted, but unlike Scan Regions, its size appears determined by the
PDL, not the Job Ticket. 

4.     Is the Copy (Service) Region the same as the Scan Region?

 

Just a few questions. 

 

Thanks,

 

Bill Wagner

            

 

From: William Wagner [mailto:wamwagner at comcast.net] 
Sent: Thursday, May 14, 2009 10:02 PM
To: mfd at pwg.org
Subject: Print (mark) content Region definition

 

The attributes I see in the Production Printing Attributes document that
appear to correspond to content region definition are:

x-image-position 

x-image-shift 

y-image-shift 

y-image-position 

But I have difficulty correlating these to what one might normally identify
as:

Content Region Origin  X Offset

Content Region X Dimension

Content Region Origin  Y Offset

Content Region Y Dimension

Could someone with a Production Attributes understanding enlighten me?

 

Thanks.

 

Bill Wagner

 

 


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