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[Gimp-user] 2# Color Management and Photoshop (was: gimp-user-list Digest, Vol 60, Issue 25)

Hello, I´ve missed one point: when printing, another setting in the dialog
Color Settings mentioned below may be of interest: in my German speaking
GIMP it´s "Farbanpassung der Drucksimulation", which is about Color Adaption
for Printing Simulation: here you can choose Saturation-Perception-Absolute
Colormetric-Relative Colormetric. The default Perception ist what I would
suggest at first, but you may try something else. If you do so, it may be
important to mark ~Printing Simulation in ~Working Mode (I´m not shure about
the expressions, first dropdown menu in the window Color Management).
Another point mentioned earlier is: if the monitor had not been calibrated
correctly, the color deviations may habe been written to the image. Using
menu Colors>Hue/Saturation: Hue might help, when preselectig the color range
you want to correct.
Regards

Klaus Goelker

-----Ursprüngliche Nachricht-----
Von: Klaus Gölker [mailto:klausgoelker gmail com]
Gesendet: Freitag, 23. September 2016 15:43
An: 'gimp-user-list gnome org'
Betreff: AW: Color Management and Photoshop (was: gimp-user-list Digest, Vol
60, Issue 25)

Standard color profile for photos and images is none or sRGB. Photoshop
imports images from scanners and cameras, which usually produce images based
on that standard sRGB. As far as I can remember, even if you create an 24
Bit image in PS, sRGB is used when saving. Another standard is the Adobe
proprietary Adobe RGB, which is  a "broader", more colorful variety of the
standard RGB (sRGB) color profile, mostly used for printing. You can
download the Adobe RGB color profile for free from Adobes website (just do a
search for Adobe RGB in a searchengine), save it to disc and implement it in
GIMP: menu Edit>Preferences>Color Management.
If an image is in Adobe RGB, opening the image in GIMP results in a warning
message, asking whether you want to keep Adobe RGB or convert it to sRGB.
You may try setting Adobe RGB as default in the menu mentioned, or just open
your image in Adobe RGB and print.
Regards


Klaus Goelker
E-Mail: klausgoelker gmail com
www: goelker.lima-city.de




-----Ursprüngliche Nachricht-----
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Gesendet: Freitag, 23. September 2016 14:00
An: gimp-user-list gnome org
Betreff: gimp-user-list Digest, Vol 60, Issue 25

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Today's Topics:

   1. Re:  Color mismatch when an image is printed (Pat David)
   2. Re:  Color mismatch when an image is printed (James Moe)
   3. Re:  Error in opening psd files (Steve Kinney)
   4. Re:  Error in opening psd files (Alexandre Prokoudine)
   5. Re:  Error in opening psd files (Partha Bagchi)


----------------------------------------------------------------------

Message: 1
Date: Thu, 22 Sep 2016 16:13:06 +0000
From: Pat David <patdavid gmail com>
To: James Moe <jimoe sohnen-moe com>, gimp-user-list gnome org
Subject: Re: [Gimp-user] Color mismatch when an image is printed
Message-ID:
        <CAPC+-km+P5jaZRhHF1U7rLKU0DTNkud=+MrJvQwNEEsG9+UeGg mail gmail com>
Content-Type: text/plain; charset=UTF-8

This is a complex problem wrapped in a short-ish email...

Is your monitor calibrated and profiled? Did you also generate a profile for
your printer? If not it's not going to be possible to accurately gauge or
anticipate what your prints will look like compared to what you see on your
monitor. :( On Wed, Sep 21, 2016 at 8:34 PM James Moe <jimoe sohnen-moe com>
wrote:


opensuse 42.1
linux 4.1.31-30-default x86_64
gimp 2.8.16

Color profile: sRGB
Printer Driver description: EPSON PictureMate PM 225 with driver Epson
PictureMate PM 225, Epson Inkjet Printer Driver (ESC/P-R) for Linux

I have a Epson PM225 inkjet color printer.

I have printed images previously with the printer and there was no
noticeable difference in color. The printer has been not used for
several months. There has likely been some GIMP updates during that time.

Currently, when I print an image that has a blue sky, the printed
color has a strong green tint to it, not really close to the displayed
blue sky at all. Other images have printed similarly with the green tint.

I have tried changing ink cartridges. No difference.

The online manual mentions that the display uses RGB while printing is
CMYK. It does not discuss what to do there is a mismatch between the two.

Any suggestions about what may be done to correct the color issue?

--
James Moe
moe dot james at sohnen-moe dot com
520.743.3936
Think.

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------------------------------

Message: 2
Date: Thu, 22 Sep 2016 19:33:55 -0700
From: James Moe <jimoe sohnen-moe com>
To: gimp-user-list gnome org
Subject: Re: [Gimp-user] Color mismatch when an image is printed
Message-ID:
        <sig 00747179ba 134cb6c4-8e9a-0076-95ca-551b9b2d3292 sohnen-moe com>
Content-Type: text/plain; charset="utf-8"

On 09/22/2016 09:13 AM, Pat David wrote:

Is your monitor calibrated and profiled? Did you also generate a
profile for your printer?


  The monitor is not calibrated.
  How do I create a profile for a printer?


If not it's not going to be possible to accurately gauge or anticipate
what your prints will look like compared to what you see on your
monitor. :(


  Well that may be.
  It does not explain the printer's distinct color shift when it was
previously mostly correct.
  Previously: blue printed as blue.
  Currently:  blue prints as green-ish.

--
James Moe
moe dot james at sohnen-moe dot com
520.743.3936
Think.



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Message: 3
Date: Thu, 22 Sep 2016 22:48:29 -0400
From: Steve Kinney <admin pilobilus net>
To: gimp-user-list gnome org
Subject: Re: [Gimp-user] Error in opening psd files
Message-ID: <d7120f81-0120-3e18-7a1f-886680ee531e pilobilus net>
Content-Type: text/plain; charset=utf-8



On 09/19/2016 04:48 PM, enzoorsi wrote:


But now in GIMP the colors seem different from Photoshop when I am
exporting in PNG/JPEG :(



The GIMP and Photoshop use different color models:  RBG in the GIMP and LAB
(if I recall correctly) in Photoshop.  Color conversions between the two
will be, at best, approximate.

:o/



------------------------------

Message: 4
Date: Fri, 23 Sep 2016 12:03:12 +0300
From: Alexandre Prokoudine <alexandre prokoudine gmail com>
To: "gimp-user-list gnome org" <gimp-user-list gnome org>
Subject: Re: [Gimp-user] Error in opening psd files
Message-ID:
        <CAFjkzc3i_buPsqO+gkYv5DQtn+wTH5rNa76VtvCLrUBoNr4P4Q mail gmail com>
Content-Type: text/plain; charset=UTF-8

On Wed, Sep 21, 2016 at 2:01 AM, Ross Martinek wrote:

PS has a number of different color standards (some Adobe?s proprietary
materials)


Any examples?

Alex


------------------------------

Message: 5
Date: Fri, 23 Sep 2016 07:02:49 -0400
From: Partha Bagchi <partha1b gmail com>
To: "gimp-user-list gnome org" <gimp-user-list gnome org>
Subject: Re: [Gimp-user] Error in opening psd files
Message-ID:
        <CAOW9c=8=3xmQ5KrV4N3E-_2eNj_U1T-e36vjppz-VjAoz+WaOA mail gmail com>
Content-Type: text/plain; charset=UTF-8

On Fri, Sep 23, 2016 at 5:03 AM, Alexandre Prokoudine <
alexandre prokoudine gmail com> wrote:


On Wed, Sep 21, 2016 at 2:01 AM, Ross Martinek wrote:

PS has a number of different color standards (some Adobe?s
proprietary

materials)

Any examples?

Alex

What's a color standard? Do you mean ICC profiles? What's proprietary

material here?


------------------------------

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