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Digital BW, The Print

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Re: [Digital BW] File Resolution

2006-03-13 by Ernst Dinkla

Peter De Smidt wrote:

> Thanks everyone for your reponses!  Let's see if I understand this 
> correctly.  Qimage supposely does a better job of up and down resizing 
> than Photoshop, and it also supposedly does a better job of output 
> sharpening.  Even if we assume that's true, I'm not sure that I should 
> use it for my files from 4x5 negatives. 

The difference in quality has been more significant in the 
past. CS/2 got better tools meanwhile. But Qimage improved too.

> First, these are saved in PSB 
> format, because they're huge, and I'm not sure that Qimage reads them. 

A valid point. Qimage isn't always capable in translating PSB. 
Alpha layers etc.

> Second, at 720ppi, my images are 12x15, which fit nicely on 13x19" 
> paper. Hence, in order to send 720 ppi to the printer, I don't have to 
> do any up or down sizing. 

Correct.

> Third, I like the flexibility of using TLR 
> sharpening in Photoshop.  Fourth, I"m unclear about using Epson's ABW 
> mode on my R2400 with Qimage.  Am I missing something here?

The last will not be a problem as ABW can cope with both 
monochrome RGB and Greyscale and QTR's profiles should work on 
Qimage if you are using them. Roy and Mike have cooperated 
again on that as far as I know.
And colour management on Qimage has been identical in results 
to Photoshop  in my experience.

I think you will be fine with the software you are already 
using. My reference to Qimage information was to sketch the 
reason that feeding 720 PPI isn't always resulting in the best 
quality.

Ernst

                    --
           Ernst Dinkla


www.pigment-print.com
(         unvollendet         )

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