Digital BW, The Print

Hi,

I've wasted a fair amount of ink and paper tonite trying to figure out
how to use Qimage together with QTR and QTR gui. My problem is that
even though everything looks right in Qimage when I drop the file on
the QTR gui it comes out at approximately the right resolution on the
page but only the center of the image is printed.

For instance, in Qimage I selected a custom paper size in my Epson
2200 driver 8.5x5.5" half sheet. Then I set my print size to 5x7 in
Qimage and double clicked on the psd file that I wanted to print. The
Qimage print preview shows what I expect, my image (originally
2008x3000 from a D100) takes up most of the half sheet. The View/Print
Queue shows the file as a 7 x 4.56 430ppi 13MB file. So I printed to a
tif file.

In QTR gui I chose a custom paper size of 8.5w x 5.5l. I set the top
and left starting points at 0.125" and unchecked the centered box.
Then I dragged the file that Qimage output on to the QTR gui and out
comes a print that is positioned properly on the page but only 4.5 x
4.125 inches.

I'm not sure what I'm doing wrong here. Can someone post their
printing workflow from PSCS to Qimage to QTR to 2200? Or at least
offer up a suggestion as to what maybe wrong here.

Thanks, Derek

dealy663 wrote:

>Hi,
>
>I've wasted a fair amount of ink and paper tonite trying to figure out
>how to use Qimage together with QTR and QTR gui. My problem is that
>even though everything looks right in Qimage when I drop the file on
>the QTR gui it comes out at approximately the right resolution on the
>page but only the center of the image is printed.
>
>For instance, in Qimage I selected a custom paper size in my Epson
>2200 driver 8.5x5.5" half sheet. Then I set my print size to 5x7 in
>Qimage and double clicked on the psd file that I wanted to print. The
>Qimage print preview shows what I expect, my image (originally
>2008x3000 from a D100) takes up most of the half sheet. The View/Print
>Queue shows the file as a 7 x 4.56 430ppi 13MB file. So I printed to a
>tif file.
>
>In QTR gui I chose a custom paper size of 8.5w x 5.5l. I set the top
>and left starting points at 0.125" and unchecked the centered box.
>Then I dragged the file that Qimage output on to the QTR gui and out
>comes a print that is positioned properly on the page but only 4.5 x
>4.125 inches.
>
>I'm not sure what I'm doing wrong here. Can someone post their
>printing workflow from PSCS to Qimage to QTR to 2200? Or at least
>offer up a suggestion as to what maybe wrong here.
>
>Thanks, Derek
>  
>
I'm not familier with " sizes but you can check the size of the Qimage 
generated TIF file by opening it again in Photoshop.

-- 

Hans Van Rafelghem
http://www.vanrafelghem.com

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Hans Van
Rafelghem <hvr@a...> wrote:
> dealy663 wrote:
> 
> >Hi,
> >
> >I've wasted a fair amount of ink and paper tonite trying to 
> >figure out how to use Qimage together with QTR and QTR gui. My
> >problem is that even though everything looks right in Qimage
> >when I drop the file on the QTR gui it comes out at approximately
> >the right resolution on thepage but only the center of the
> >image is printed.
> >
> >For instance, in Qimage I selected a custom paper size in my Epson
> >2200 driver 8.5x5.5" half sheet. Then I set my print size to 5x7 in
> >Qimage and double clicked on the psd file that I wanted to print.
> >The Qimage print preview shows what I expect, my image
> >(originally 2008x3000 from a D100) takes up most of the half 
> >sheet. The View/Print Queue shows the file as a 7 x 4.56 430ppi
> >13MB file. So I printed to a tif file.
> >
> >In QTR gui I chose a custom paper size of 8.5w x 5.5l. I set 
> >the top and left starting points at 0.125" and unchecked the
> >centered box.
> >Then I dragged the file that Qimage output on to the QTR gui
> >and out comes a print that is positioned properly on the page
> >but only 4.5 x 4.125 inches.
> >
> >I'm not sure what I'm doing wrong here. Can someone post their
> >printing workflow from PSCS to Qimage to QTR to 2200? Or at least
> >offer up a suggestion as to what maybe wrong here.
> >
> >Thanks, Derek
> >  
> >
> I'm not familiar with " sizes but you can check the size of the
> >Qimage generated TIF file by opening it again in Photoshop.
> 
> Hans Van Rafelghem

I agree that it's not obvious what you are doing wrong.  When I am
uncertain about size and placement, I try to examine the Qimage output
file in an image editor before I waste ink and paper, wherever
possible.

My approach has been not to position the image on the page in QTRGui.
 In Qimage I set the size of the tiff file to be the size of the
printable page area.  I work in metric, so for an A4 page where the
non-printable margins are 4mm on a 210x297mm page, I set the tiff file
size at 202x289mm at 360dpi.  In QTRGui I set the page size as A4 and
tell it to centre the image on the page just to be sure.  Then all
placement and sizing issues are handled inside Qimage.  

I haven't had the sorts of problems that you describe.  The only
problem that I had was when I tried using a 3mm margin (long story
here), and it split the image over 4 pages, ¼ on each.  That is a
good
way to waste paper.

HTH

F_P

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "dealy663"
<dealy663@h...> wrote:
> For instance, in Qimage I selected a custom paper size in my
> Epson 2200 driver 8.5x5.5" half sheet. Then I set my print size
> to 5x7 in Qimage and double clicked on the psd file that I wanted
> to print. The View/Print Queue shows the file as a 7 x 4.56 430ppi
> 13MB file. So I printed to a tif file.

Reading this again carefully, I think I see your problem.  The custom
paper size in the Epson 2200 driver is irrelevant, because you're not
using the printer driver.  

To set the page size, first you have to choose "Print to File" in
Qimage and set the TIFF file dimensions (inches and DPI).  As I said
in my last post, my suggestion is to set this to entire printable area
of your page, i.e. it's physical size minus the margins.  Then in
QTRGui, you set the actual physical size of the page.  

If you follow this approach you don't position the image(s) on the
printed page in QTRGui.  The placement of the image(s) on the printed
page is handled entirely inside Qimage.

My suggestion is also to choose "Centered" in QTRGui, which centres
the TIFF output file from Qimage on the page.  This shouldn't be
necesary, but avoids any problems with uneven margins.  

This approach means that you are in effect using Qimage as the layout
half of a RIP, and QTR(Gui) as the printer driver half.

F_P

F_P,

> My approach has been not to position the image on the page in 
> QTRGui.  In Qimage I set the size of the tiff file to be the 
> size of the printable page area.  I work in metric, so for an 
> A4 page where the non-printable margins are 4mm on a 
> 210x297mm page, I set the tiff file size at 202x289mm at 
> 360dpi.  In QTRGui I set the page size as A4 and tell it to 
> centre the image on the page just to be sure.  Then all 
> placement and sizing issues are handled inside Qimage.  

Can you explain why you output from Qimage at 360dpi? My 
understanding (probably faulty :-) is that Qimage would output
the image to an Epson printer at 720dpi. I'm trying to work
out what my strategy is now, for example:

1. do PS stuff
2. bring it into Qimage, setting the tiff output file at 202x289mm
   (for an A4) at 360 (720? 1440? 2880?)dpi
3. bring it into QTRGui and set the full 210x297mm page
   (centered)

Apart from the 360/720 question (and where does 1440/2880 come
in???), I've had problems with PS->QTRGui where I've had a
landscape image, told QTRGui I'm using landscape orientation,
putting the paper into the 2100 as a landscape, and it's
a) printed it as a portrait, and b) cut off half of it by
starting halfway up the paper (even halfway up a portrait
piece of paper). I've taken to making sure everything is
in portrait format, from the file to QTRGui to the paper
in the printer. Not much extra work, but it did peeve me off
at the time.

Regards
Robert

Hi Derek

I had the same problem.

What I did to solve it was use Qimage to print to a file like you do, but
select a smaller printable area.

My setup in Qimage is print to file, 720 dpi, 10x8 size.

I latter send this file to QTR and Epson 2200, with 11x8.5 paper.

If I send a 11x8.5 file to QTR, the result is a mess.

I´m sure I could print a file bigger than 10x8, maybe 10.5 x 8 or something.
But I didn´t care to test.

Hope that helps you.

Nelson

> -----Original Message-----
> From: dealy663 [mailto:dealy663@hotmail.com] 
> Sent: sexta-feira, 5 de novembro de 2004 05:20
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Qimage + QTR sizing problem
> 
> 
> 
> 
> Hi,
> 
> I've wasted a fair amount of ink and paper tonite trying to 
> figure out how to use Qimage together with QTR and QTR gui. 
> My problem is that even though everything looks right in 
> Qimage when I drop the file on the QTR gui it comes out at 
> approximately the right resolution on the page but only the 
> center of the image is printed.
> 
> For instance, in Qimage I selected a custom paper size in my 
> Epson 2200 driver 8.5x5.5" half sheet. Then I set my print 
> size to 5x7 in Qimage and double clicked on the psd file that 
> I wanted to print. The Qimage print preview shows what I 
> expect, my image (originally 2008x3000 from a D100) takes up 
> most of the half sheet. The View/Print Queue shows the file 
> as a 7 x 4.56 430ppi 13MB file. So I printed to a tif file.
> 
> In QTR gui I chose a custom paper size of 8.5w x 5.5l. I set 
> the top and left starting points at 0.125" and unchecked the 
> centered box. Then I dragged the file that Qimage output on 
> to the QTR gui and out comes a print that is positioned 
> properly on the page but only 4.5 x 4.125 inches.
> 
> I'm not sure what I'm doing wrong here. Can someone post 
> their printing workflow from PSCS to Qimage to QTR to 2200? 
> Or at least offer up a suggestion as to what maybe wrong here.
> 
> Thanks, Derek
> 
> 
> 
> 
> 
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--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Robert McArthur"
<mcarthur@d...> wrote:
  
> 
> Can you explain why you output from Qimage at 360dpi? My 
> understanding (probably faulty :-) is that Qimage would output
> the image to an Epson printer at 720dpi.

Qimage resamples up to 720 ppi (not dpi) for Epson desktop printers
regardless of the incoming image resolution. So I agree it would be a
bit counterproductive to do any resampling before handing off to
Qimage, since one of Qimage's strengths is the use of superior
interpolation schemes than the ones available in PS, etc.


> I've had problems with PS->QTRGui where I've had a
> landscape image, told QTRGui I'm using landscape orientation,
> putting the paper into the 2100 as a landscape, and it's
> a) printed it as a portrait, and b) cut off half of it by
> starting halfway up the paper (even halfway up a portrait
> piece of paper). I've taken to making sure everything is
> in portrait format, from the file to QTRGui to the paper
> in the printer. Not much extra work, but it did peeve me off
> at the time.

It sounds as though you were trying to feed sheets to the printer in
"landscape" orientation (i.e., the long edge first). Why were you
doing that? The printer driver (and, I assume QTR) assumes that the
paper is fed only one way (with short edge first). No wonder you had
problems.

Phil

Phil

You need to set the page size in Qimage to 5x7. When Qimage prints to file,
the image size it creates is the page size you have selected.

-Stephen
 www.sbillard.org/Stephen

> -----Original Message-----
> From: dealy663 [mailto:dealy663@...] 
> Sent: Thursday, November 04, 2004 11:20 PM
> To: DigitalBlackandWhiteThePrint@yahoogroups.com
> Subject: [Digital BW] Qimage + QTR sizing problem
> 
> 
> 
> 
> Hi,
> 
> I've wasted a fair amount of ink and paper tonite trying to 
> figure out how to use Qimage together with QTR and QTR gui. 
> My problem is that even though everything looks right in 
> Qimage when I drop the file on the QTR gui it comes out at 
> approximately the right resolution on the page but only the 
> center of the image is printed.
> 
> For instance, in Qimage I selected a custom paper size in my 
> Epson 2200 driver 8.5x5.5" half sheet. Then I set my print 
> size to 5x7 in Qimage and double clicked on the psd file that 
> I wanted to print. The Qimage print preview shows what I 
> expect, my image (originally 2008x3000 from a D100) takes up 
> most of the half sheet. The View/Print Queue shows the file 
> as a 7 x 4.56 430ppi 13MB file. So I printed to a tif file.
> 
> In QTR gui I chose a custom paper size of 8.5w x 5.5l. I set 
> the top and left starting points at 0.125" and unchecked the 
> centered box. Then I dragged the file that Qimage output on 
> to the QTR gui and out comes a print that is positioned 
> properly on the page but only 4.5 x 4.125 inches.
> 
> I'm not sure what I'm doing wrong here. Can someone post 
> their printing workflow from PSCS to Qimage to QTR to 2200? 
> Or at least offer up a suggestion as to what maybe wrong here.
> 
> Thanks, Derek
> 
>

So when printing to a file how do I set the page size in Qimage? 

Last nite I was first setting the page size by first setting Qimage to
print to the 2200 and then clicking on the button with the printer and
wrench and picking the page size in the Epson dialog. This would set
what appeared to be the proper page size in the Qimage print preview
window. Then I would tell Qimage that I was printing to a file and
click the 5x7 button below the print preview. I can see how this was
proably wrong.

The thing that made this doubly confusing was that even when I opened
the tif file that Qimage created in PSCS the file was of the correct
dimensions with the image sized and placed properly, yet it would
print from QTR incorrectly. 

Derek

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Stephen Billard"
<stephen@s...> wrote:
> You need to set the page size in Qimage to 5x7. When Qimage prints
to file,

> the image size it creates is the page size you have selected.
> 
> -Stephen
>  www.sbillard.org/Stephen
> 
> 
> > -----Original Message-----
> > From: dealy663 [mailto:dealy663@h...] 
> > Sent: Thursday, November 04, 2004 11:20 PM
> > To: DigitalBlackandWhiteThePrint@yahoogroups.com
> > Subject: [Digital BW] Qimage + QTR sizing problem
> > 
> > 
> > 
> > 
> > Hi,
> > 
> > I've wasted a fair amount of ink and paper tonite trying to 
> > figure out how to use Qimage together with QTR and QTR gui. 
> > My problem is that even though everything looks right in 
> > Qimage when I drop the file on the QTR gui it comes out at 
> > approximately the right resolution on the page but only the 
> > center of the image is printed.
> > 
> > For instance, in Qimage I selected a custom paper size in my 
> > Epson 2200 driver 8.5x5.5" half sheet. Then I set my print 
> > size to 5x7 in Qimage and double clicked on the psd file that 
> > I wanted to print. The Qimage print preview shows what I 
> > expect, my image (originally 2008x3000 from a D100) takes up 
> > most of the half sheet. The View/Print Queue shows the file 
> > as a 7 x 4.56 430ppi 13MB file. So I printed to a tif file.
> > 
> > In QTR gui I chose a custom paper size of 8.5w x 5.5l. I set 
> > the top and left starting points at 0.125" and unchecked the 
> > centered box. Then I dragged the file that Qimage output on 
> > to the QTR gui and out comes a print that is positioned 
> > properly on the page but only 4.5 x 4.125 inches.
> > 
> > I'm not sure what I'm doing wrong here. Can someone post 
> > their printing workflow from PSCS to Qimage to QTR to 2200? 
> > Or at least offer up a suggestion as to what maybe wrong here.
> > 
> > Thanks, Derek
> > 
> >

dealy663 wrote:

>So when printing to a file how do I set the page size in Qimage? 
>
Print to file and set page width & height.

-- 

Hans Van Rafelghem
http://www.vanrafelghem.com

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Robert McArthur"
<mcarthur@d...> wrote:
> Can you explain why you output from Qimage at 360dpi? My 
> understanding (probably faulty :-) is that Qimage would output
> the image to an Epson printer at 720dpi.

Because I read somewhere (I forget where) that this was as much as was
necessary.  I reluctantly confess that I don't understand this dpi vs
ppi thing.  Perhaps I'm doing something wrong, in that I should be
using a higher setting, in which case hopefully someone will tell me.

F_P

> > I've had problems with PS->QTRGui where I've had a
> > landscape image, told QTRGui I'm using landscape 
> orientation, putting 
> > the paper into the 2100 as a landscape, and it's
> > a) printed it as a portrait, and b) cut off half of it by starting 
> > halfway up the paper (even halfway up a portrait piece of 
> paper). I've 
> > taken to making sure everything is in portrait format, from 
> the file 
> > to QTRGui to the paper in the printer. Not much extra work, 
> but it did 
> > peeve me off at the time.
> 
> It sounds as though you were trying to feed sheets to the 
> printer in "landscape" orientation (i.e., the long edge 
> first). Why were you doing that? The printer driver (and, I 
> assume QTR) assumes that the paper is fed only one way (with 
> short edge first). No wonder you had problems.

That's right, I was trying to feed it in landscape mode. I thought
that if you wanted to print landscape, you told it in the interface
(portrait/landscape mode) and put in the paper *landscape*-ways.
Obviously not :-) It's OK now I'm feeling less of a twit, but it
did waste some paper while I worked the three variables out 
(orientation of the image, portrait/landscape button in print i/f,
paper orientation in printer).

Robert

> Qimage resamples up to 720 ppi (not dpi) for Epson desktop 
> printers regardless of the incoming image resolution. So I 
> agree it would be a bit counterproductive to do any 
> resampling before handing off to Qimage, since one of 
> Qimage's strengths is the use of superior interpolation 
> schemes than the ones available in PS, etc.

Can you explain what Qimage PPI I should use if I want
my 2100 to:
 1. print directly at Epson's "1440" from Qimage?
 2. print directly at Epson's "2880" from Qimage?
These two must be different since the printer ICC's are
different.
 3. print through QTRGui?
I don't have an option of 1440/2880 with QTRGui AFAIK.
If there is, can someone please tell me how and add the
obvious two questions to the above list.

If I'm going direct from PS to QTRGui, what dpi/ppi should
I use - 360? 720? 1440? 2880?

I should admit that thus far I've gone from PS to QTRGui
using 300dpi and upsampling to the right height/width. It
looks quite good to me on output, but I'd be very happy 
to find out how to make it better.

I've put off PS -> Qimage -> QTRGui thus far as the two times
I tried it with B&W, Qimage turned it an awful magenta in the
output file, and once I printed it before checking the output
and was dismayed (interesting effect but not what I was after)
and the second I checked first. I'm using the "right" printer
profile in Qimage so I'm not sure what's happening there 
either...

Thanks for any help you can give,
Robert

ferdinand_paris wrote:
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Robert McArthur"
> <mcarthur@d...> wrote:
> 
>>Can you explain why you output from Qimage at 360dpi? My 
>>understanding (probably faulty :-) is that Qimage would output
>>the image to an Epson printer at 720dpi.
> 
> 
> Because I read somewhere (I forget where) that this was as much as was
> necessary.  I reluctantly confess that I don't understand this dpi vs
> ppi thing.  Perhaps I'm doing something wrong, in that I should be
> using a higher setting, in which case hopefully someone will tell me.
> 
> F_P

It depends on your printer. printer setting etc what native input 
the Epson driver expects in the input file. Qimage shows that 
native resolution above the preview to the right. For Epsons it 
varies between 360 and 720 PPI input.

What QTR will need per printer/paper/resolution/etc setting I 
don't know but one could ask Roy Harrington.  I doubt that there 
will be much difference between sending it 360 and 720 PPI from 
Qimage. If Roy doesn't provide you the answer you could check the 
Gimp-print sources.

You could try the test image from:

http://www.ddisoftware.com/qimage/quality/

but I have no idea whether that will work for the B&W workflow.

Ernst

Roy, apropos of the exchange below, what DPI should we be using when
sending an image to QTR for printing on the Epson 2100?  720 or 360?

I'm using Qimage on a PC to send the image to QTR via QTRGui, although
this doesn't really matter.  UC inks and both matte and
pearl/semi-gloss papers.

F_P


--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla
<E.Dinkla@c...> wrote:

> >>Can you explain why you output from Qimage at 360dpi? My 
> >>understanding (probably faulty :-) is that Qimage would output
> >>the image to an Epson printer at 720dpi.
> > 
> > Because I read somewhere (I forget where) that this was as much as
> > was necessary.
> 
> It depends on your printer. printer setting etc what native input 
> the Epson driver expects in the input file. Qimage shows that 
> native resolution above the preview to the right. For Epsons it 
> varies between 360 and 720 PPI input.
> 
> What QTR will need per printer/paper/resolution/etc setting I 
> don't know but one could ask Roy Harrington.  I doubt that there 
> will be much difference between sending it 360 and 720 PPI from 
> Qimage. If Roy doesn't provide you the answer you could check the 
> Gimp-print sources.
> 
> You could try the test image from:
> 
> http://www.ddisoftware.com/qimage/quality/
> 
> but I have no idea whether that will work for the B&W workflow.
> 
> Ernst

ferdinand_paris wrote:

> 
> Roy, apropos of the exchange below, what DPI should we be using when
> sending an image to QTR for printing on the Epson 2100?  720 or 360?

He is on the B&W list and probably not on this one. Mac man in a 
sense.

Ernst

What I usually do is simply send my files to QTR at whatever PPI they
already are rather than re-sampling.   In general I have files that are
between 360 and 720.  In the PC version what happens is the PPI of
the input is upsampled to 1440x720ppi using a bi-linear algorithm.  For
inputs of at least 360ppi I expect this upsampling is good enough.
Anything less should be upsampled using a better algorithm like
bi-cubic or what Qimage does.

Given all that if you are using Qimage probably the best would be to
feed QTR a file of 720ppi rather than 360 but whether you'll see the
difference is probably image dependent and how close you look at it.

Roy

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "ferdinand_paris" 
<ferdinand_paris@y...> wrote:

> 
> Roy, apropos of the exchange below, what DPI should we be using when
> sending an image to QTR for printing on the Epson 2100?  720 or 360?
> 
> I'm using Qimage on a PC to send the image to QTR via QTRGui, although
> this doesn't really matter.  UC inks and both matte and
> pearl/semi-gloss papers.
> 
> F_P
> 
> 
> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla
> <E.Dinkla@c...> wrote:
> > >>Can you explain why you output from Qimage at 360dpi? My 
> > >>understanding (probably faulty :-) is that Qimage would output
> > >>the image to an Epson printer at 720dpi.
> > > 
> > > Because I read somewhere (I forget where) that this was as much as
> > > was necessary.
> > 
> > It depends on your printer. printer setting etc what native input 
> > the Epson driver expects in the input file. Qimage shows that 
> > native resolution above the preview to the right. For Epsons it 
> > varies between 360 and 720 PPI input.
> > 
> > What QTR will need per printer/paper/resolution/etc setting I 
> > don't know but one could ask Roy Harrington.  I doubt that there 
> > will be much difference between sending it 360 and 720 PPI from 
> > Qimage. If Roy doesn't provide you the answer you could check the 
> > Gimp-print sources.
> > 
> > You could try the test image from:
> > 
> > http://www.ddisoftware.com/qimage/quality/
> > 
> > but I have no idea whether that will work for the B&W workflow.
> > 
> > Ernst

>>Roy, apropos of the exchange below, what DPI should we be using when
>>sending an image to QTR for printing on the Epson 2100?  720 or 360?
> 
> 
> He is on the B&W list and probably not on this one. Mac man in a 
> sense.


Sorry, I should have checked the subject line better. Adapted my 
message filter for folders after this.

Ernst

Roy Harrington wrote:

> 
> 
> What I usually do is simply send my files to QTR at whatever PPI they
> already are rather than re-sampling.   In general I have files that are
> between 360 and 720.  In the PC version what happens is the PPI of
> the input is upsampled to 1440x720ppi using a bi-linear algorithm.  For
> inputs of at least 360ppi I expect this upsampling is good enough.
> Anything less should be upsampled using a better algorithm like
> bi-cubic or what Qimage does.
> 
> Given all that if you are using Qimage probably the best would be to
> feed QTR a file of 720ppi rather than 360 but whether you'll see the
> difference is probably image dependent and how close you look at it.
> 
> Roy

Roy,

Is that 1440 x 720 PPI used for all Epsons, even the 9000 ?

Ernst

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Ernst Dinkla <E.Dinkla@c...> 
wrote:
> Roy Harrington wrote:
> 
> > 
> > 
> > What I usually do is simply send my files to QTR at whatever PPI they
> > already are rather than re-sampling.   In general I have files that are
> > between 360 and 720.  In the PC version what happens is the PPI of
> > the input is upsampled to 1440x720ppi using a bi-linear algorithm.  For
> > inputs of at least 360ppi I expect this upsampling is good enough.
> > Anything less should be upsampled using a better algorithm like
> > bi-cubic or what Qimage does.
> > 
> > Given all that if you are using Qimage probably the best would be to
> > feed QTR a file of 720ppi rather than 360 but whether you'll see the
> > difference is probably image dependent and how close you look at it.
> > 
> > Roy
> 
> Roy,
> 
> Is that 1440 x 720 PPI used for all Epsons, even the 9000 ?
> 
> Ernst

Hi Ernst,

Yes,  the basic idea is that you want to know the gray value for each
dot location on the print.   So whatever DPI you print at becomes the
PPI that you upsample to.

Roy