To me this says that any figure is a compromise, and it is only sensible
to select one which works empirically, is 'good enough'.
Which makes a 'better' image, setting an empirical res in PS such that you
have to let PS re-sample the image, therefore degrading the image, or
re-size, with no
what I intended to call attention to was that with the
original Epson Stylus printer, a 5" x 7" image whose resolution was 600
dpi printed out blurry as compared to the same 5" x 7" image downsampled
to somewhere between 240 and 300 dpi.
On that particular printer, at least, it caused
shAf wrote:
Since you're both talking about lines screens, I'd guess yes.
Historically, the number is associated with angles between the
dot-pattern offsets, and the calculated best value is the root of 2
(1.414) ... but this is a minimum, and since 'more-cannot-hurt' was
rounded
Austin Franklin wrote:
I believe the 2000P uses dot size modulation on top of everything else,
so
you don't need anything close to 6X6 dither cell to get 256 gray levels.
Good point for the 2000P. I have both the 1160 and the 3000, and I believe
they are fixed dot size... I'll
PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Hampton Childress
Sent: Friday, November 10, 2000 12:40 AM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: 4000 dpi question
Laurie Solomon wrote:
Regardless, the suggestion of 2 to 2.5 times the line screen as an image
resolution has been
Austin Franklin wrote:
As I said above, regardless
of what causes the effect, my prints have less artifacts if the output
resolution
from the software is 240dpi. Previously I had been using 300dpi but
switched
after I discovered the reduction in artifacts.
Understood, and agree,
here?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Hampton Childress
Sent: Wednesday, November 08, 2000 10:50 PM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: 4000 dpi question
Tony Sleep wrote:
My receollection is that Epson introduced 240dpi
Laurie writes ...
regarding:
Regardless, the suggestion of 2 to 2.5 times the line
screen as an image resolution has been a good
rule of thumb in my experience
My understanding is that the recommended pre-press line
screen is 1.5 to 2.0 the image resolution and
not the 2.0 to 2.5.
To: [EMAIL PROTECTED]
Subject: RE: filmscanners: 4000 dpi question
Laurie writes ...
regarding:
Regardless, the suggestion of 2 to 2.5 times the line
screen as an image resolution has been a good
rule of thumb in my experience
My understanding is that the recommended pre-press line
-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Arthur Entlich
Sent: Wednesday, November 08, 2000 6:08 PM
To: [EMAIL PROTECTED]
Subject: Re: Epson printing was Re: filmscanners: 4000 dpi question
Austin Franklin wrote:
Do you know the algorithm Epson uses, when they call
Laurie Solomon wrote:
Regardless, the suggestion of 2 to 2.5 times the line screen as an image
resolution has been a good rule of thumb in my experience
My understanding is that the recommended pre-press line screen is 1.5 to 2.0
the image resolution and not the 2.0 to 2.5. Are we
f Of Frank Paris
Sent: Tuesday, November 07, 2000 9:54 PM
To: [EMAIL PROTECTED]
Subject: RE: Epson printing was Re: filmscanners: 4000 dpi question
Is stochastic dithering what Foley and van Dam call "random dithering"? They
don't explain it (in "Computer Graphics") but I ca
the picture in the Epson manual is grossly deleinated banding. Now remember Im
using the piezo driver which prints differently than epson driver. Much more
fine lines. I get different types of banding but all much more subtle than in
that picture. Yet still quite visible with naked eye at a foot
Austin Franklin wrote:
The Epson 1200 apparently prints best at an output dpi of 240 but what about
the best output dpi for the Epson 1270?
Why would you expect it to be different?
Why would you expect any DPI to be 'best'? I am not saying it's wrong (or even
silly ;-), but I'd
Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Laurie Solomon
Sent: Tuesday, November 07, 2000 11:49 PM
To: [EMAIL PROTECTED]
Subject: RE: Epson printing was Re: filmscanners: 4000 dpi question
Could be Frank; but I do not know for sure. I am not familiar
Do you know the algorithm Epson uses, when they call it 'error diffusion'?
--
From: Frank Paris
Sent: Wednesday, November 08, 2000 10:33 AM
To: [EMAIL PROTECTED]
Subject:RE: Epson printing was Re: filmscanners: 4000 dpi question
But error diffusion is not a random
At 5:08 PM -0500 11/7/00, Austin Franklin wrote:
I examined the 3 prints using a high-quality 4x loupe. There
was a slight but visible improvement in quality from 240 to 360,
which didn't surprise me too much. What did surprise me was that
there was about the same degree of improvement
inal Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Frank Paris
Sent: Wednesday, November 08, 2000 9:33 AM
To: [EMAIL PROTECTED]
Subject: RE: Epson printing was Re: filmscanners: 4000 dpi question
But error diffusion is not a random process.
Frank Paris
[EMAIL PROTECTED]
Ju
Do you know the algorithm Epson uses, when they call it 'error
diffusion'?
It's a patented form of stochastic dithering. Which is what I do when
confronted with large phone bills.
Regards
Tony Sleep
http://www.halftone.co.uk - Online portfolio exhibit; + film scanner
info comparisons
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Laurie Solomon
Sent: Wednesday, November 08, 2000 10:52 AM
To: [EMAIL PROTECTED]
Subject: RE: Epson printing was Re: filmscanners: 4000 dpi question
Hell, for all I know, Epson may be just using
I believe the 2000P uses dot size modulation on top of everything else,
so
you don't need anything close to 6X6 dither cell to get 256 gray levels.
Good point for the 2000P. I have both the 1160 and the 3000, and I believe
they are fixed dot size... I'll check the Epson web site to see how
Tony Sleep wrote:
My receollection is that Epson introduced 240dpi as an ideal figure for the
generation of 720dpi printers that preceded the 700 EX, and 750 and 1200.
It is now so long ago, maybe 3-4yrs, I can't even remember their names
apart from the Colour Stylus 2 which now
Stephen Irving wrote:
The Epson 1200 apparently prints best at an output dpi of 240 but what about
the best output dpi for the Epson 1270?
Why would you expect it to be different?
Art
Art,
Thanks for the info. I didn't know if the changes made in the 1270 would
include the optimal output dpi setting.
Steve
- Original Message -
From: Arthur Entlich [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 07, 2000 4:18 AM
Subject: Re: filmscanners: 4000 dpi
About a month ago I touched off a thread on the piezo list about banding going
away at certain dpi with piezo driver. But I was mistaken, it was extremely
sensitive to kind of paper, getting a good printer, image file(scan) quality,
and getting absolutely anal about nozzle and alignment checks. I
IL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 07, 2000 7:57 AM
Subject: Re: Epson output dpi was Re: filmscanners: 4000 dpi question
About a month ago I touched off a thread on the piezo list about banding
going
away at certain dpi with piezo driver. But I was mistaken, it was
extrem
At 8:43 PM -0500 11/6/00, Austin Franklin wrote:
*All* Epson photo printers will print best at integer divisors of
1440dpi.
That is not universally true. Some people claim they see no difference at
some 'magic' number, but to just keep the DPI above 240 or so...
The driver has a dither
At 11:48 AM -0800 11/7/00, shAf wrote:
It is a mystery to me why the Epson manuals do not provide this
information, and it is also interesting to point out this number has
remained the same since the very first Epson "Stylus Color" printer
(720x720), for which the user manual did suggest
I examined the 3 prints using a high-quality 4x loupe. There
was a slight but visible improvement in quality from 240 to 360,
which didn't surprise me too much. What did surprise me was that
there was about the same degree of improvement from the 360 to the
non-resampled 367.9 print. It
through as is.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of shAf
Sent: Tuesday, November 07, 2000 1:49 PM
To: [EMAIL PROTECTED]
Subject: RE: filmscanners: 4000 dpi question
Laurie writes ...
Austin, if I am not mistaken, I believe the 240 figure came
www.lucenti.com e-photography site
- Original Message -
From: "shAf" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, November 07, 2000 8:48 PM
Subject: RE: filmscanners: 4000 dpi question
Laurie writes ...
Austin, if I am not mistaken, I believe the 240 figure came
shAf [EMAIL PROTECTED] wrote:
It is a mystery to me why the Epson manuals do not provide this
information
I think one of the manuals that came with my Stylus 700 does say that 240dpi
is the best option when calculating the resolution to print at, but I would
have
to dig them out to check!
I
.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Austin Franklin
Sent: Tuesday, November 07, 2000 5:56 PM
To: '[EMAIL PROTECTED]'
Subject: RE: Epson printing was Re: filmscanners: 4000 dpi question
Why would you expect any DPI to be 'best'? I am not saying
was Re: filmscanners: 4000 dpi question
Alas, it is my understanding that, unless you deliberately select
halftoning
per se, the printer uses stochastic dithering rather than digital
halftoning
proper, which if I am correct makes notions of halftone cell size and
pattern irrelevant. This
The Epson 1200 apparently prints best at an output dpi of 240 but what about
the best output dpi for the Epson 1270?
- Original Message -
From: Rob Geraghty [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Sunday, November 05, 2000 8:51 PM
Subject: RE: filmscanners: 4000 dpi question
Stephen wrote:
The Epson 1200 apparently prints best at an output dpi
of 240 but what about the best output dpi for the
Epson 1270?
*All* Epson photo printers will print best at integer divisors of 1440dpi.
It's easy enough to test for yourself. The visible dithering in the print
will be
what should I scan my slides or negatives at to achieve the best
results. 4000dpi??
Always scan at the highest resolution of the scanner. NEVER resize your
image, it interpolates or decimates the data, which means it's not 'as
good' as your original data.
In PS, use Image\Image Size, and
Sisk98 wrote:
I just received the Polaroid sprintscan 4000 slide scanner.
I;m new to scanning. I would like to print 11x17 inch prints
on my Epson 1200. My question is..what should I scan my slides
or negatives at to achieve the best results. 4000dpi??
The Epson 1200 will print best at an
38 matches
Mail list logo
