On Thu, 27 Dec 2001 09:24:41 +1000, Rob Studdert wrote:
[...] colour film scanners usually utilize a 3 linear arrays each
with a primary colour filtration [...] the sensor in a camera (not
the tethered studio back type) has the three colour filters over
adjacent pixels in a 4 pixel grid ie.
: Friday, December 21, 2001 10:24 PM
To: [EMAIL PROTECTED]
Subject: Re: DPI vs. PPI
On Fri, 21 Dec 2001 18:50:24 -0700, aimcompute wrote:
I have noticed that scanner mfr.'s use the term interchangeably. For
instance Minolta lists their scanner resolutions in dpi.
I've always thought
By the way in the latest
product news from Fuji they say that generally (without specifying the
film)
a 35mm snapshot has about 6 MP of info that can be mined out of it with
even
the best scanners.
I've read this in other places too.
Bill, KG4LOV
[EMAIL PROTECTED]
-
This message is from the
That's interesting, but let me ask this. I'll do it rhethorical fashion.
When I scan a 35mm slide with my 2438ppi scanner, what part of the 20+
megabyte file would I choose as being inconsequential to the image?
And now with the 4000ppi scanners it seems there is even more data to be
found in
: DPI vs. PPI
That's interesting, but let me ask this. I'll do it rhethorical fashion.
When I scan a 35mm slide with my 2438ppi scanner, what part of the 20+
megabyte file would I choose as being inconsequential to the image?
And now with the 4000ppi scanners it seems there is even more data
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of aimcompute
Sent: Wednesday, December 26, 2001 12:10 PM
To: [EMAIL PROTECTED]
Subject: Re: DPI vs. PPI
That's interesting, but let me ask this. I'll do it rhethorical fashion.
When I scan a 35mm slide
, 2001 11:06 AM
Subject: RE: DPI vs. PPI
I don't know either. If I thought that there was really only about 6 MP of
real info in a 35mm frame I might make the switch to digital sooner than I
expect to. But I'm not sure they are not fudging their opinions down so as
to sell large amounts
enough to believe this.
Ciao,
graywolf
[EMAIL PROTECTED]
- Original Message -
From: Kent Gittings [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, December 26, 2001 11:45 AM
Subject: RE: DPI vs. PPI
Sorry but color CCD digicams use exactly the same technology as scanners
And, why pay for a 10Kdpi drum scan?
Ciao,
graywolf
[EMAIL PROTECTED]
- Original Message -
From: aimcompute [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, December 26, 2001 12:09 PM
Subject: Re: DPI vs. PPI
That's interesting, but let me ask this. I'll do it rhethorical
Subject: RE: DPI vs. PPI
True but if raw pixel count is only getting the equivalent of
interpolation
between the film grains you may not be getting anything real. If the image
blown up is a little fuzzy around the edges of things then more pixels
will
not cure the problem. Only a sharper image
On 26 Dec 2001 at 11:45, Kent Gittings wrote:
Sorry but color CCD digicams use exactly the same technology as scanners in most
cases. The only interpolation they do is if they are capable of producing a
result that has higher res than the number of actual pixels in the CCD grid.
I can't get
On 26 Dec 2001 at 11:28, aimcompute wrote:
It's the standards issue again... and what size the final output will be. For
most people 6 mega-pixels may be good enough, but good enough and as good
may be two different things, depending on the user's intentions.
I suspect that too, many people
On 26 Dec 2001 at 15:31, Tom Rittenhouse wrote:
To the best of my knowledge, 10K dpi will resolve the grain of normal film.
Someone on the list said his 400 dpi would do that, but I think there is a
difference between showing the grain and fully resolving it.
All very valid points, I have
I agree with his suspicion and your agreement :-). Seriously, I scan my 35 mm
negs at 4000 ppi, which yields a file of about 55 megabytes. As a test, I've
tried scanning at 2000 ppi, which produced a file of 20+megabytes. A print from
the 55 megabyte file was obviously superior in terms of detail
I have noticed that scanner mfr.'s use the term interchangeably. For
instance Minolta lists their scanner resolutions in dpi.
Not trying to be nit-picky... I promise I'm not... but if the product
manufacturers who write the specs call it that, I guess it's not wrong to
use the term. In essence
On Fri, 21 Dec 2001 18:50:24 -0700, aimcompute wrote:
I have noticed that scanner mfr.'s use the term interchangeably. For
instance Minolta lists their scanner resolutions in dpi.
I've always thought of it as pixels each have all of the color
vectors (R, G, and B, or C, M, Y, and K, or
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