Digital BW, The Print

> From: Isabel Cutler [mailto:billswife_1999@...]
>
> I recently installed a Niagara III CIS with MIS pigment inks.
> I had a tough time getting it going with lots and lots of bad nozzle
> checks and cleanings...before I learned I just had to let the thing
> rest overnight to settle down.
>
> I find that if I don't print for a few days the nozzle checks are
> really bad and I have to do two cleanings, then run a test print to
> get the thing going.
>
> My question is...the images from my Canon A80 routinely show as 180ppi
> when shown full size in Photoshop.  I would like to print them at a
> higher resolution, but same number of inches.  Does it do any good to
> resample for higher resolution?

Not usually. On some printers, certain images that have fine regular detail
may result in moire if the resolution doesn't divide evenly into the
resolution of the printer. For instance, Epson desktop machines resample
everything to 720ppi and the wide format ones resample to 360ppi, using
"nearest neighbor". Dunno what Canon does. But images that show moire are
rare. Be aware, though, that fixing this only requires resampling to a
submultiple of the printer's resolution.

If you have an image that has really sharp edges in it, you might be able to
improve the sharpness of large prints by using the Genuine Fractals file
format. You save the file, then reload it at a larger resolution, and it
manages to translate some of the highest spatial frequency components
upwards so that sharp edges remain sharp at the higher resolution. But
remember that it's really inventing image data, in a manner that works well
sometimes but not always.

--

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...