Re: RGB Color Space Info Request
Re: RGB Color Space Info Request
- Subject: Re: RGB Color Space Info Request
- From: "Andrew Rodney" <email@hidden>
- Date: Sat, 23 Nov 2002 09:49:14 -0700
on 11/22/02 9:39 PM, Don Hutcheson at email@hidden wrote:
>
Just assign the different RGB spaces you want to compare to my RGBXPLORER
>
image (www.hutchcolor.com/Images_and_targets.html) and then convert to
>
whatever output device you like with whatever intent you like.
I've scanned from a fairly wide gamut scanner (a FlexTight 848 using a
custom profile made by the wonderful HCT Target) directly into several
working spaces (sRGB, Adobe RGB and Wide Gamut RGB) then output to a fairly
wide gamut device (A Fuji PG3500). On examination under a D50 lightbox, I
could hardly see any difference at all. The 4x5 was the "famous" Yarn image
that Kodak provided in the old days. IOW, a pretty saturated original. The
differences on output were pretty mild giving me the impression that this
entire Working Space debate is somewhat overblown. YES you do see
significant differences when you plot the gamuts. But when ink hits paper
(in this case when a laser exposes a silver media), the differences in the
Working Spaces is pretty trivial. I'm NOT suggesting we all start using
sRGB! I'm suggesting that in my limited testing, I'm not seeing differences
here that require a good deal of head scratching as to what space to pick.
Adobe RGB seemed to work out just fine but then sRGB didn't look to shabby
either.
>
Look at the channels and you'll see that some colors (e.g. bright reds)
>
which should have printed 100% Magenta will be clipped at a lower number,
>
e.g. 95%, when the RGB space was INSIDE the gamut of the output device.
Again, the ultimate test in my mind isn't looking at the file, it's looking
at the output. I'm more than willing to look at any output of various
Working Spaces and change my mind. But so far, the differences are not
enough to drag anyone but color geeks into the mind boggling number of
discussions that have transpired since Photoshop 5 shipped with a room full
of Working Spaces to pick. I think it's an interesting discussion but would
hate to see some of the newer color management users stressing over what
they might feel is a life altering decision (what working space to use). So
far, this discussion is up there with how many ICC profiles can fit on the
head of a pin.
Andrew
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