Re: Media Testing for maclife.de
Re: Media Testing for maclife.de
- Subject: Re: Media Testing for maclife.de
- From: "Mark Segal" <email@hidden>
- Date: Wed, 10 Sep 2008 12:27:22 -0400
Ken,
What's problematic is that creating profiles for "pleasure" is like nailing jelly to a wall both from an evaluation perspective and for users with a "perceptual accuracy" objective. The DNG profiler may help resolve this.
I think the profile under the hood is helpful because if the profile were really crap, it's conceivable that it may defeat even flexible and adaptable software. There are probably necessary versus sufficient conditions affecting all of this, which need to be distinguished for nailing the role of the profile, but I don't have the detailed inside knowledge to do so, therefore it is a reasonable inference that Adobe is doing something that works quite well - in my circumstances, which are probably replicated 100,000s tims over.
Mark
----- Original Message -----
From: Fleisher, Ken
To: MARK SEGAL ; Uli Zappe
Cc: ColorSync Mailing
Sent: Wednesday, September 10, 2008 12:18 PM
Subject: Re: Media Testing for maclife.de
On 9/10/08 9:53 AM, "MARK SEGAL" <email@hidden> wrote:
> What you say in #2 below is probably a correct statement of intent, but also a
> problemmatic one, because something that pleases some people will displease
> others and something that looks pleasant in one kind of image may well look
> unpleasant in others;
Exactly, and that was my point in #1.
Why is it problematic to state that the developers of raw converters are not
attempting to achieve color accuracy? Remember that the scope of
camera/software that we are discussing are commercial-grade products, not
scientific-grade products. Developers of the commercial products go to great
lengths to achieve pleasing color, not accurate color.
> Because LR/ACR allows me to do this very successfully most of the time, I have
> to conclude that the profile of my 1Ds3 working under the hood is an important
> feature of this "enabling environment".
Why can you conclude that? All this means is that LR/ACR has "flexibility
and adaptability" and that you are very good at correcting your images. Once
you engage in the process you described, the 1Ds3 profile has little to do
with your outcome.
One additional aspect of camera calibration that has not been discussed here
(Uli, perhaps you can tell us if you included this step for your testing) is
flat-fielding. This is the process of correcting for spatial
non-uniformities in the lighting, lens falloff, etc. This is a critical step
for camera calibration and can become very problematic if not done (and done
correctly). The only stand-alone application that I know of for this purpose
is Robin Myers' Equalight
<http://www.rmimaging.com/products/equalight/equalight_index.html>. So, I'm
just wondering whether this has been considered in the experiment...
--
Ken Fleisher
Photographer
Imaging & Visual Services
National Gallery of Art
Washington, D.C.
Phone: (202) 712-7471
email@hidden
--
Ken Fleisher
Photographer
Imaging & Visual Services
National Gallery of Art
6th Street & Constitution Avenue, N.W.
Washington, D.C. 20565
Phone: (202) 712-7471
email@hidden
Mailing Address:
2000B South Club Drive
Landover, MD 20785
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