"William Robb" wrote:
>I have been told that it is best to size the file to a divisor
>of the printer output.
>For example, my printer is capable of a maximum resolution of
>2880 dpi, and that the output ideally would be 360 dpi, or 720
>dpi, or some such.
>I have read a couple of posts now where the printer is being run
>at a somewhat oddball resolution, such as 743 ppi.
>So, is there any logic to what I have been told?
>Or does it not really matter?
An inkjet printer needs to use blocks of multiple printer dots. As I
understand it, scaling the image to a multiple is suggested because it was
thought that the image scaling algorithms in the photo manipulation software
were better than that used by the printer driver, and so that, by choosing a
multiple, the printer driver wouldn't have to do any scaling at all.
I did some tests with my printer (1440x720, 6 inks, error diffusion (?)
halftoning) and found that _I_ couldn't tell the difference between color
images at 300dpi or higher, except that larger images took longer to print.
For B&W on the same printer through, the results were totally different -- I
didn't start to get anything close to reasonable until I was sending upwards
of 720dpi data, and I never really got to where I liked the B&W prints even
at that level (i.e. maybe I needed higher?).
So, the best recommendation is probably to use that as a starting place for
your own testing.
hope that helps,
patbob ([EMAIL PROTECTED])
-
This message is from the Pentax-Discuss Mail List. To unsubscribe,
go to http://www.pdml.net and follow the directions. Don't forget to
visit the Pentax Users' Gallery at http://pug.komkon.org .
