Digital BW, The Print

Ernst,
I have tried file resolution at 144ppi, 288ppi, 360ppi, and 720ppi and 
still get the same problem. I have tried increasing the image size in 
.1" increments and still get the same problem. Just for kicks I even 
printed it as a negative image, white pupils with thin black line, same 
problem. I just printed it on a different printer (9000 with carbon 
sepia inkset) and same RIP (ImagePrint) and I get the same results. So 
I can safely rule out it is the printer. Has to be the RIP or file. 
Next step will be to try it with the Epson driver and then with Epson 
driver on my 9600.

Hopefully this is not the files, they are portraits and can not be 
re-shot.

I will post results.
Mark

On Dec 19, 2004, at 8:03 AM, Ernst Dinkla wrote:

> lulalake_1999 wrote:
>  >
>  > Hmmmm. I don't know but I had a oddly similar situation. I was
>  > printing a sheet of 3x5 Christmas shots of my little girl for
>  > relatives/cards etc. when I noticed a black line about one or two
>  > pixels wide where the "smile crevice" is between her nose and the
>  > cheek. This line didn't exist in the pic.
>  >
>  > What I found was this. I was printing from a rather large file, 
> about
>  > 5400x3700 .PSD and not downsizing for the picture, simply resizing 
> in
>  > the print preview. When I downsized, then printed, it went away.
>  >
>  > Could you have sizing/interpolation issues?
>  >
>  > Jules
>
>
>  It is almost Christmas, can't be misplaced holy halo's, could it?
>
>  No kidding, most likely interpolation artifacts in the RIP or
>  driver.� So interpolating the image to 360 PPI or 720 PPI,
>  depending on what the driver's native resolution is will take out
>  further interpolation in the driver/RIP and you can check on the
>  monitor whether those circles exist in the image before it gets
>  printed. If they appear you can spot them out. Use it when a
>  thing like that happens.
>
>  There's an interesting parallel with Qimage of some months ago,
>  the upscaling in Qimage has been very good for a long time but
>  the downscaling was far more crude, anti-aliasing could be better
>  for example. That showed in image conversions for the web. On
>  request of Bart van der Wolf work was done by Mike to improve the
>  downscaling and it is now much better than before. See:
>
>
>
>  <http://www.xs4all.nl/~bvdwolf/main/foto/down_sample/down_sample.htm>
>
>  <http://www.xs4all.nl/~bvdwolf/main/foto/down_sample/example1.htm>
>
>
>  The first url shows circle targets for the test, couldn't be more
>  appropriate.
>
>
>  A far weirder problem occurred some years ago when a friend with
>  some 9000s got Athlon CPU's with the first VIA chip motherboards.
>  � Randomly placed ovals with lighter tones in the prints. Same
>  images, software but Pentium systems didn't have it. He returned
>  the motherboards. There was some analogy to sound problems with
>  those motherboards but it never became clear what was going on.
>
>  Ernst
>
>
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