Re: Linux Photoshop

Paul Mitchum wrote:

Stacey <fotocord@xxxxxxxxx> wrote:

Paul Mitchum wrote:

Stacey <fotocord@xxxxxxxxx> wrote:

Again: if there is no color management in ONE point in the chain, the
color managed workflow is lost.

One wishes that there were a better user-oriented workflow in linux,
but really, what you mistake for a broken chain is actually a need to
manually do what other systems do automatically.

It is a broken chain because there is no working color space.

We're talking about *linux,* not GIMP. Let's shift over to Mac for a
moment, a system you'll no doubt agree has excellent color management.
There is no working color space for Mac OS X. There are *default* color
spaces you can assign for RGB and CYMK and so forth, and there are
*calibrated* profiles for output devices like monitors and printers. But
there is no working color space, not one that matters to the user.
Whatever math ColorSync does to convert between these profiles, it does
in secret.

And it's the same way in linux, except that there's nothing automated
about it. If you care about the color management, you have to do it
yourself. It's not a *system,* like ColorSync, but it's all available.

If you have a profile for a printer, and you want to print an image
with an embedded profile, then you issue a command to convert the image
to the new profile in a new file. Then you send it to the printer.

If the editing software has no "working space" how do you know if the
edited image is actually still in or even fits in the original color
space it was tagged as?

I'm not talking about editing software. I'm talking about a command you
type in to convert the image from one profile to another. The 'convert'
command in ImageMagick, for instance, can do this.

If you have a profile calibrated for your monitor, and you embed that
profile in an image you edited on that monitor, then you are free to
convert the image to any other color profile you please, under linux.
Just like under Mac or Windows.

Monitor profile embedded in an image? Sorry, but that is at best a kluge.
What software supports this anyway?

If you're changing the color saturation and the editing software isn't
color space aware, I don't see how it can contain the image in a color
space or how it can later be converted to a "profiled" version for
printing if you have edited it outside of a working color space, which is
easy to do.

Ok, so back in GIMP now: You calibrate your monitor. You print out an
image, compare it to the monitor, and then tweak the profile for the
monitor and repeat until you get it perfect. Then you can tag any edited
image with that profile. That's what profiles *are for.* The monitor's
profile *is* the 'working space,' because it's the color space you're
working within.

ACK!!!!!!

If all you ever deal with is one printer and one monitor that might get you
"good enough" for whatever you do. But it's not calibration in any
professional sense.

Again if you're doing basic stuff and working with sRGB images this stuff
isn't probably a real big deal. If you are a pro or a perfectionist,
trying to use the gimp is frustrating and a time waster at best.

Sure. If you absolutely need good color management then GIMP isn't for
you. But you can get by, with a little ingenuity.

Which says that it is lacking a good deal.

I tried to work with the Gimp before I ever got PS-CS2 and the only
reason I forked out the $600+ for the adobe software was because the GIMP
was such a fight and never got good results using it.

That, of course, is your perogative.

--
--John
to email, dial "usenet" and validate
(was jclarke at eye bee em dot net)
.

Relevant Pages

  • Re: Windows Color Managment
    ... Creating a colour profile for your monitor is part of the "Colour Workflow" procedure. ... If I am using Adobe Gamma and using color management in Photoshop etc... ...
    (microsoft.public.windowsxp.general)
  • Re: Linux Photoshop
    ... It is a broken chain because there is no working color space. ... a system you'll no doubt agree has excellent color management. ... the new profile in a new file. ...
    (rec.photo.digital)
  • Re: Confused about color management
    ... > - AdobeRGB is the working profile ... > - When does the monitor profile come into play and what happens if I ... profile and several others interacting in the color management engine ... printer color management then proceed to print properties and select ...
    (rec.photo.digital)
  • Re: Linux Photoshop
    ... Given you can't accurately calibrate a monitor without one.... ... Color management is done by the processes that provide ... functionality *only* within the center box. ... Yet it can't contain the image in this color space because there is NO ...
    (rec.photo.digital)
  • Re: Totally confused by color management
    ... Your problem is that you don't understand color management especially ... etc.), output and abstract (working space). ... If you shoot with a sRGB profile ... But first of all you need to calibrate your monitor conforming to standard ...
    (alt.graphics.photoshop)
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