Austin Franklin wrote:
I am curious how you know they (let's say the Epson printers)
print more
than one dot at any one 'point' on the paper, ie, the CM, CY
Let's call it empirical observation.
I asked 'the power that knows for sure' and he said no, they do
not overlay.
No, I mean the dots are printed on top of one another, not near, and not
partially overlapped.
I have a 90x microscope, and I looked. I do not find any dots printed
precisely on top of one another. They do overlap, and I believe that is
caused by dot gain.
The printers to NOT mix inks.
Austin Franklin wrote:
... that dot
from your printer can only be one of at test a dozen colors. In most
cases ... the printer can only place on dot of
each color in it's cartridges on any one spot. So, a CMYK
printer, can,
for instance, place a C, CM, CY, CK, CMY, CMK, M, MY, MK,
I am curious how you know they (let's say the Epson printers)
print more
than one dot at any one 'point' on the paper, ie, the CM, CY
Let's call it empirical observation.
I asked 'the power that knows for sure' and he said no, they do
not overlay.
They are very close, but the
lich
Sent: Thursday, March 01, 2001 12:54 AM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: File sizes, file formats, etc. for printing
8.5 x 11and 13 x 17...
Austin Franklin wrote:
... that dot
from your printer can only be one of at test a dozen colors. In most
cases ... the printe
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Austin Franklin
Sent: Thursday, March 01, 2001 7:01 AM
To: [EMAIL PROTECTED]
Subject: RE: filmscanners: File sizes, file formats, etc. for printing
8.5 x 11and 13 x 17...
The printers to NOT mix
There is a big difference between halftoning and dithering. Most of the
printers we use, inkjet, home laser printers, etc, use dithering.
Halftoning involves having each ink color screened into dots and then
each of these dots is further matrixed to create different color
density. So the
h [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, February 28, 2001 3:22 AM
Subject: Re: filmscanners: File sizes, file formats, etc.
for printing 8.5 x 11and 13 x 17...
Marvin Demuth wrote:
1. The typical file sizes you use at the printing stage
and the ppi of your
final scans.
... that dot
from your printer can only be one of at test a dozen colors. In most
cases ... the printer can only place on dot of
each color in it's cartridges on any one spot. So, a CMYK printer, can,
for instance, place a C, CM, CY, CK, CMY, CMK, M, MY, MK, MYK, Y, YK or
CMYK dot down in
There is a big difference between halftoning and dithering. Most of the
printers we use, inkjet, home laser printers, etc, use dithering.
Halftoning involves having each ink color screened into dots and then
each of these dots is further matrixed to create different color
density.
Not
http://albums.photopoint.com/j/AlbumList?u=62684
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Arthur Entlich
Sent: Tuesday, February 27, 2001 7:23 PM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: File sizes, file formats, etc. for printing
8.5 x 11and
... and I would still argue that stoichastic or random dithering is
NOT an implimentation of halftoning ... that is, this implimentation
of dithering does not vary the dot size, rather the number and
placement of dots.
That is where we disagree. I believe that it is the effect that is
Austin writes ...
There is a big difference between halftoning
and dithering. Most of the printers we use,
inkjet, home laser printers, etc, use dithering.
...
Not necessarily. You are describing an implementation,
not a process. I still contend, and what sources
I have checked,
My 'O' My...I am learning from you experienced scanners and printers, in
short order, more than I could have learned with "Many Moons" of blind
tinkering.
The principle that I work under in all that I do is to look at every
situation through a telescope before I start looking at it with a
Austin Franklin wrote:
... that dot
from your printer can only be one of at test a dozen colors. In most
cases ... the printer can only place on dot of
each color in it's cartridges on any one spot. So, a CMYK printer, can,
for instance, place a C, CM, CY, CK, CMY, CMK, M, MY, MK, MYK,
EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Arthur Entlich
Sent: Tuesday, February 27, 2001 7:23 PM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: File sizes, file formats, etc. for printing
8.5 x 11and 13 x 17...
Understanding resolution Copyright A
Austin Franklin wrote:
There is a big difference between halftoning and dithering. Most of the
printers we use, inkjet, home laser printers, etc, use dithering.
Halftoning involves having each ink color screened into dots and then
each of these dots is further matrixed to create
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Arthur Entlich
Sent: Wednesday, February 28, 2001 2:09 PM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: File sizes, file formats, etc. for printing
8.5 x 11and 13 x 17...
Some top end high res
://albums.photopoint.com/j/AlbumList?u=62684
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Arthur Entlich
Sent: Wednesday, February 28, 2001 2:56 PM
To: [EMAIL PROTECTED]
Subject: Re: filmscanners: File sizes, file formats, etc. for printing
8.5 x
... that dot
from your printer can only be one of at test a dozen colors. In most
cases ... the printer can only place on dot of
each color in it's cartridges on any one spot. So, a CMYK
printer, can,
for instance, place a C, CM, CY, CK, CMY, CMK, M, MY, MK, MYK, Y, YK or
CMYK dot
As I prepare for scanning for these size prints, it will help me, and I
suspect others, if some of you scanning for quality 8.5 x 11 and 13 x 17
prints from 35mm in either b w or color will comment on:
I do not vary my scan for output size. I always scan at the optical
resolution of the
Marvin writes ...
I am confused as to the techniques that are used.
I had the pleasure of viewing a CD of b w TIFF
scans this past weekend, made by a professional
photographer, who is at the level that he has had
photographs published by National Geographic.
He told me he had scanned the
shAf previously wrote ...
Marvin writes ...
..., I found that the file sizes were about
5MB, the print sizes were about 5 x 7
and the ppi were 385.
Whereas I thought this photographer's prints would
provide an example of the math, it doesn't work.
1st ...
2nd ...
shAf wrote:
...
However, the math does not agree with the filesize you mention!!
(5" X 385ppi) X (7" X 385ppi) X 3 RGB channels is not equal to 5Mb!!
... more rather, ~15Mb (no wonder you are confused???)
shAf :o)
I checked a specific file and came up with this data:
2794 x
Essentially yes. Read up on it all at http://www.scantips.com/
Maris
- Original Message -
From: "Marvin Demuth" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Tuesday, February 27, 2001 1:44 PM
Subject: RE: filmscanners: File sizes, file formats, etc. for printing 8.5 x
11a
Marvin writes ...
It is interesting that VuePrint Pro_32 refers to 385 dpi
rather than ppi.
In scanning and printing terminology can we use the terms
dpi and ppi interchangeably?
It is common to see both terms of resolution used as if they are
interchangeable, but if you consider
It is common to see both terms of resolution used as if they are
interchangeable, but if you consider (for example) Epson printers
which have a inkjet resolution of 720DPI, but should be sent an image
file of 240PPI, you can see where the context of the terminology is
important.
Austin writes ...
Why do you believe dithering has anything to do with the
distinction of ppi vs dpi?
Impact printers were spec'd in dpi, as well as my laser
printers
Impact printers, laser printers, ink jet printers ... any printer
which needs to dither some sort of CYMk
Impact printers, laser printers, ink jet printers ... any printer
which needs to dither some sort of CYMk pattern for creating
"apparent" colors have a DPI resolution specification which should be
considered separate from the RGB resolution you ask them to print
(PPI).
I understand your
Austin writes ...
Now, another question...why do you call it 'dither' instead of
halftone?
...
I consider "dither" as the general term, which includes
"halftone". "Halftone" would seem best applied to traditional
methods, and not include some of the newer techniques ... e.g.,
lto:[EMAIL PROTECTED]]On Behalf Of Austin Franklin
Sent: Tuesday, February 27, 2001 7:18 PM
To: [EMAIL PROTECTED]
Subject: RE: filmscanners: File sizes, file formats, etc. for printing
8.5 x 11and 13 x 17...
Austin writes ...
Now, another question...why do you call it 'dither' instead of
My understanding is different. Halftoning is not dithering, but you can use
dithering IN the halftone process. Halftone describes a process...as I said
in another post. Dithering is a 'function'. I will check out your
reference, and perhaps that reference is the source of the confusion.
The
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