Re: [OT] Dot shape prevalence
Re: [OT] Dot shape prevalence
- Subject: Re: [OT] Dot shape prevalence
- From: "RS" <email@hidden>
- Date: Mon, 10 Oct 2005 10:50:54 -0700 (PDT)
- Importance: Normal
Roger,
Is your RIP using asymmetrical resolution? Could that be the cause of the
jagged dots you see? The RIP may also introduce noise to give the dots an
irregular shape.
I'd suggest getting a USB microscope to investigate. In addition to giving
you the ability to document plate issues (and reviewing press sheets) with
images saved to your computer, you'd be able to share the images with us
:-)
email@hidden
------
Roger Breton wrote:
Funny you mention it. When I look at the dot shape out of an AGFA CTP, with
a 10x loupe, it's plain to see that even though it says "2400 dpi" on the
box, the dot shape is not all that *sharp* if you ask me, unlike the
traditional film-based so-called hard dot. For example, take a 10% 150 lpi
AM "round" dot. Well, the shape of that dot is anything but nicely circular:
it is circular "in intention" but it has a highly irregular geometry, akin
to a circle scan with a too low resultion having the appearance of a
collection of tiny-itty-bitty pixels all bunched together, randomly sticking
out of the "main" shape in every direction. If that's what "state of the
art" in halftone screening mean, in current workflows, and I'm talking
Prinergy, Harlequin and Rampage here, then I say we've actually taken a step
backward in quality.
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