Re: Grayscale perception
Re: Grayscale perception
- Subject: Re: Grayscale perception
- From: Ernst Dinkla <email@hidden>
- Date: Tue, 06 Dec 2005 17:37:25 +0100
Graeme Gill wrote:
Robert L Krawitz wrote:
Gutenprint (and Gimp-Print, for that matte) does all of its screening
and color corrections in 16-bit resolution, although only Gutenprint
(aka Gimp-Print 5.x) offers 16-bit inputs in general cases.
The point I was making is it also depends on whether the *screen* supports
16 bit (I'm referring mainly to threshold screens here). Everything feeding
into the screening might be 16 bit, but if the screen was (say) 128x128
pixels,
then it can't represent 65535 levels ! (Of course a screen might be
256x256 or
bigger, but unless the pattern is such that one pixel turns on at a time,
it still might not have 16 bit resolution).
Of course if you're thinking error diffusion (and similar variants), then
it's probably enough that the error diffusion math is 16 bit.
Graeme Gill.
What size cell matrix is still needed with the Epson K3
printers for monochrome? You got 3 black ink dilutions, 2-3-4
? droplet sizes per resolution mode so the number of 128 x 128
seems big enough.
Ernst
--
Ernst Dinkla
www.pigment-print.com
( unvollendet )
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