Re: Dpi and line screen
Re: Dpi and line screen
- Subject: Re: Dpi and line screen
- From: Ernst Dinkla <email@hidden>
- Date: Mon, 02 Jan 2006 11:57:32 +0100
The usual ratios mentioned for acceptable work fall between
1.40 and 2 x. I have always assumed that the lowest acceptable
quality was at the root value 1.41...x, in conventional
screening corresponding with the 45 degree angle of one of the
screens the digital image at 0/90 degree has to be converted
to (the other angles but the 0 degrees need a similar factor).
The 2x being the maximum needed in view of Nyquist. With
stochastic screening etc and better upsampling + print
sharpening possible on digital images these days the lowest
ratio may have dropped to 1:1 for the digital images to start
from. Most of time this ratio number isn't an issue at all
with today's quality of digital images and cheap memory. Is
the extra time and space needed for 2x a real problem ?
Ernst
--
Ernst Dinkla
www.pigment-print.com
( unvollendet )
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