Re: Colorsync-users Digest, Vol 2, Issue 507 -Filtering
Re: Colorsync-users Digest, Vol 2, Issue 507 -Filtering
- Subject: Re: Colorsync-users Digest, Vol 2, Issue 507 -Filtering
- From: <email@hidden>
- Date: Fri, 23 Dec 2005 10:05:14 -0500
Roger and Nathan,
If you intend to do such a test, may I suggest Imatest, a
nice program to analyse noise, with a ColorChecker! You
need the Pro version for individual channel analysis. A
trial version is available.
http://www.imatest.com
Danny Pascale
email@hidden
www.BabelColor.com
On Fri, 23 Dec 2005 09:45:18 -0500
Roger Breton <email@hidden> wrote:
If you don't have so much as a single shot demonstrating
the magical
noise eliminating capabilities of your trusty old
tungsten filter to
show off, then what exactly are you basing this
assertion on in the
first place?
Nathan,
You see, this is exactly what I was refering to when I
wrote a few days ago
as a reply to this thread that we'd need some kind of
metric to qualify the
level of noise, so that we're all on the same
wavelength. Someone wrote me
in the meantime to inform me that the wavelength nand
matters in this
reporting. I did not have time to follow it up with that
person but now that
I see your reply, and I too am curious how to quantify
the noise reduction
as a result of using a blue filter to shoot under
tungsten light. The idea
is sound, conceptually, but does one implement it, I
don't know? Could we
agree on shooting the ColorChecker chart, compare the
RGB channels under
tungsten WITH blue filter and WITHOUT blue filter? Would
that make a
suitable test?
Roger Breton | Laval, Canada | email@hidden
http://pages.infinit.net/graxx
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