Roy,
Thanks for the reply. So it seems that QTR on Windows will resample in all cases, even when the input file is exactly 720ppi.
But I’m now actually more confused. I like to think I understand how printing software works for the most part, but I don’t understand what “correct pixel boundary” means and how the margins of my image (presumably you mean how much space between the image edge and the edge of available printable space within the page size) affects whether you need to resample or not.
Can you elaborate on this?
I fully understand your perspective on wanting to de-emphasize “exactness” in producing our fine art, and I respect that. But like Brian, I think there is enough evidence (and yes, sometimes visible) that resolution-related workflow decisions can impact results. This is all I’m trying to achieve – informed decisions. I just want to fully understand my tools so I know how best to use them in producing my desired results.
Thanks for all your help and comments. Dave
P.S. Sorry I won’t be able to visit your show in Los Altos…I’m on the East coast but it would definitely be interesting to see first hand an entire show of QTR-produced work!
From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com]
Sent: Monday, February 27, 2017 8:05 PM
To: QuadtoneRIP@yahoogroups.com
Subject: Re: [QuadtoneRIP] Re: Optimal TIF file resolution for QTR?
Dave,
I think its more accurate to say in (4) that QTR driver resamples to 720dpi on the correct pixel boundary.
Now, under the best conditions if you set margins appropriately that probably does't change any values.
But if you use metric or you use decimal values in margins you are likely to be doing worse.
Try it out. Make artificial test cases and see what you get. You may find it interesting -- but I don't think
it's important in real images.
Roy
On Mon, Feb 27, 2017 at 2:47 PM, dtrout@...t [QuadtoneRIP] <QuadtoneRIP@yahoogroups.com> wrote:
Thanks Brian - very helpful.
I'm a PC user of QTR (should have mentioned that in my original post). From my reading of the other thread it sounds like QTR will do the resampling on Windows. I don't want to get into the pros/cons on this topic, I just want to understand exactly what QTR does. I'll decide what to do with my files from there :-)
So for the cases I mention in the original post, I'm assuming this is the behavior on QTR on Windows:
1. Input TIF < 360ppi (QTR will upsample to 720ppi)
2. Input TIF = 360ppi (QTR will upsample to 720ppi)
3. 360ppi < Input TIF < 720ppi (QTR will upsample to 720ppi)
4. Input TIF = 720ppi (QTR will NOT resample)
Roy, can you confirm the above?
Many thanks,
Dave
--
Roy Harrington
roy@...
www.harrington.com