QTR-Quadtone RIP

Hi Roy, and thank you.

Looking back at my messages, I wasn't very clear on sizes. Let me try and briefly summarize: (and yes, I was using jpg's)

My original file was 3977 x 1498 pixels, and at 180 ppi, it worked out be a linear size of about 22" x 8.3". (It was a photocopy of two strips of 35mm film - that's how I make contact sheets in this digital age). I thought it didn't need to be that large for my 8 1/2" x 11" paper so I reduced it 1980 x 746 pixels, still at 180 ppi, which gave me a linear size of 11 x 4.1. When I loaded the reduced file in QTR, I wanted a 1/2" border at each end, so within QTR I reduced it to 91%. But the printout was huge, I only got the middle three frames or so of the strip of six frames.

Then getting an idea from your exchanges with Ned, I decided to load my original larger file into QTR. Again, I wanted a border, so I ended up with printing the file at 45% of its original size. This time the printout was fine.

Then something you said in your message to me gave me a clue: 

> Different libraries that read/write the file
> then make different resolution assumptions/defaults.
> This makes the scaling a problem sometimes.

I was reducing the original file using FastStone, a handy little utility I use for quick and dirty file work. But then I thought I'd try reducing the file in PhotoShop and voila, this time my printout was fine.

Moral of the story: if I'm going to print something in QTR I should do my file size reductions in PS.

It all worked out, and I learned something.

Many thanks!

Paul

--- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:
>
> Hi Paul,
> 
> I'm not sure exactly what your issue is.  Ned's I believe is due to
> the scaling in 1%
> increments.  Sounds like yours may be different.  I'm not sure whether
> your "size"
> references are "pixel sizes" or "linear sizes".
> 
> Another thing that has shown up sometimes is using JPG files.  A lot
> of the programs
> that save jpg's seem to leave out the "linear size" of the image.
> (i.e. 1000 pixels could be
> any number of inches).   Different libraries that read/write the file
> then make different
> resolution assumptions/defaults.   This makes the scaling a problem sometimes.
> 
> Are you using jpg's?  Did you find a setup that works consistently?
> -- could be just that you used PS which I think always saves the linear size.
> 
> Roy
> 
> On Wed, May 2, 2012 at 5:56 AM, Paul <paulmwhiting@...> wrote:
> >
> >
> > Hello Roy,
> >
> > Perhaps you missed my post a few posts back, but I took a cue from your exchange with Ned. What I did was go back to my original file, which was substantially larger, and then reduce it within QTR. What I did earlier was to reduce the size outside QTR, in Photoshop.
> >
> > It worked! Is this somehow related to Ned's question?
> >
> > Thanks for your program!
> >
> > Paul