Color management under Linux?

[Heiner Lamprecht]

Hi folks,

does anybody have any experience in color management on Linux?  Are
there any plans to add such functionality in digiKam?

I just started to deal with this topic and it looks quite
interesting to me.  I would very much like to hear how you think
about that.


Cheers,


    Heiner

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It appears that there is no system wide standard CMS in Linux (and no
need for one AFAIC), but individual apps can (and do)  support different
CMS systems like LCMS and others which don't immediately come to mind.
Gimp has a plug in to do profile conversion, cinepaint is also CMS
aware, Scribus, can't forget that one.. Ehh, ImageMagick does colour
management. The problem to a new user (and I count myself in this
regard) is that every app does it differently, unfortunately also to
varying degrees of complexity.

A good site to start at could be this one:
http://www.behrmann.name

(and Google, of course)

I have not found any integrated solutions that include colorimeters for
monitor profiling, like the Colorvision Spyder on the Mac and that other
OS which shall remain nameless...

Regards,
Dennis.

If you just want to calibrate your monitor, I suggest a search for
'Norman Koren', uhh whoops, I just did:
http://www.normankoren.com/color_management.html
An excellent and Linux friendly Coulour management guide.





Heiner Lamprecht wrote:

> Hi folks,
>
> does anybody have any experience in color management on Linux?  Are
> there any plans to add such functionality in digiKam?
>
> I just started to deal with this topic and it looks quite
> interesting to me.  I would very much like to hear how you think
> about that.
>
>
> Cheers,
>
>
>     Heiner
>
>  
> ------------------------------------------------------------------------
>
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users
>  

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[Heiner Lamprecht]

On Thursday 02 February 2006 20:24, Dennis Meulensteen wrote:
> It appears that there is no system wide standard CMS in Linux
> (and no need for one AFAIC), but individual apps can (and do)
> support different CMS systems like LCMS and others which don't
> immediately come to mind. Gimp has a plug in to do profile
> conversion, cinepaint is also CMS aware, Scribus, can't forget
> that one.. Ehh, ImageMagick does colour management.

But as far as I know, they do not support different colour spaces
like sRGB or AdobeRGB, only using ICC profiles for scanners and
stuff like that.


    Heiner

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[Gilles Caulier]

Le Jeudi 2 Février 2006 19:58, Heiner Lamprecht a écrit :
> Hi folks,
>
> does anybody have any experience in color management on Linux?  Are
> there any plans to add such functionality in digiKam?

Done in digikam 0.9.0 alpha from KDE svn ('trunk' branch). Need to be tested
indeep.

Any 0.9.0 screenshots are available  at this url :

http://digikam3rdparty.free.fr/Screenshots/

Paco, if you want discribe the new ICC profiles part of digiKam, fell free  
todo it (:=)))

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[Heiner Lamprecht]

On Thursday 02 February 2006 22:07, Gilles Caulier wrote:
> Le Jeudi 2 Février 2006 19:58, Heiner Lamprecht a écrit :
> > Hi folks,
> >
> > does anybody have any experience in color management on Linux?
> > Are there any plans to add such functionality in digiKam?
>
> Done in digikam 0.9.0 alpha from KDE svn ('trunk' branch).

Cool ;-)



    Heiner

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Hi!

Digikam 0.9.0 has some support for color profiles as far as I see.
It is only available on svn, but I guess the time will come :)
And I am also happy to see this improvement in digikam...

regards,
Gabor

Heiner Lamprecht wrote:

> Hi folks,
>
> does anybody have any experience in color management on Linux?  Are
> there any plans to add such functionality in digiKam?
>
> I just started to deal with this topic and it looks quite
> interesting to me.  I would very much like to hear how you think
> about that.
>
>
> Cheers,
>
>
>     Heiner
>
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Digikam-users mailing list
> [hidden email]
> https://mail.kde.org/mailman/listinfo/digikam-users

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> Le Jeudi 2 Février 2006 19:58, Heiner Lamprecht a écrit :
>> Hi folks,
>>
>> does anybody have any experience in color management on Linux?  Are
>> there any plans to add such functionality in digiKam?
>
> Done in digikam 0.9.0 alpha from KDE svn ('trunk' branch). Need to be
> tested
> indeep.
>
> Any 0.9.0 screenshots are available  at this url :
>
> http://digikam3rdparty.free.fr/Screenshots/

WOW!

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[Gerhard Kulzer]

Am Donnerstag, 2. Februar 2006 20:24 schrieb Dennis Meulensteen:

> It appears that there is no system wide standard CMS in Linux (and no
> need for one AFAIC), but individual apps can (and do)  support different
> CMS systems like LCMS and others which don't immediately come to mind.
> Gimp has a plug in to do profile conversion, cinepaint is also CMS
> aware, Scribus, can't forget that one.. Ehh, ImageMagick does colour
> management. The problem to a new user (and I count myself in this
> regard) is that every app does it differently, unfortunately also to
> varying degrees of complexity.
>
> A good site to start at could be this one:
> http://www.behrmann.name
>

Hi Gilles and Paco,
if you need any explanation from this site in German, don't hesitate to ask
me.

Gerhard
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[Gilles Caulier-2]

Le Jeudi 2 Février 2006 22:01, Heiner Lamprecht a écrit :

> On Thursday 02 February 2006 22:07, Gilles Caulier wrote:
> > Le Jeudi 2 Février 2006 19:58, Heiner Lamprecht a écrit :
> > > Hi folks,
> > >
> > > does anybody have any experience in color management on Linux?
> > > Are there any plans to add such functionality in digiKam?
> >
> > Done in digikam 0.9.0 alpha from KDE svn ('trunk' branch).
>
> Cool ;-)

There is a new entry in my blog about a new feature added to 0.9.0 alpha about
all image editor color correction tools... with a fresh screenshot :

http://www.digikam.org/?q=node/64

My pleasure to develop digiKam for you...

Gilles
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Heiner Lamprecht wrote:
> Hi folks,
>
> does anybody have any experience in color management on Linux?  Are
> there any plans to add such functionality in digiKam?

already a doc about the plugins would be great :-)

jdd

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[Gilles Caulier-2]

Le Vendredi 3 Février 2006 11:53, jdd a écrit :
> Heiner Lamprecht wrote:
> > Hi folks,
> >
> > does anybody have any experience in color management on Linux?  Are
> > there any plans to add such functionality in digiKam?
>
> already a doc about the plugins would be great :-)
>

What do you mean exactly about this point ?

The digikam handbook will be updated before 0.9.0 final release. There are a
lot of jobs to do into digiKam documentation, especially about color
management !

I will very happy if any volomters can help us to update this part. This is
not programmer task. You just need to have a correct English to write the
book (it's not my case (:=))), but i'm learning)

Gilles Caulier

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> There is a new entry in my blog about a new feature added to 0.9.0 alpha
> about all image editor color correction tools... with a fresh screenshot
> :
>
> http://www.digikam.org/?q=node/64
>

Hello,

Could you add your blog to planetkde.org?

Thanks do Dotty it would be much easier to track new entries :)

Thanks.

m.

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[Gilles Caulier-2]

Le Vendredi 3 Février 2006 14:47, Mikolaj Machowski a écrit :

> > There is a new entry in my blog about a new feature added to 0.9.0 alpha
> > about all image editor color correction tools... with a fresh screenshot
> >
> >
> > http://www.digikam.org/?q=node/64
>
> Hello,
>
> Could you add your blog to planetkde.org?
>
> Thanks do Dotty it would be much easier to track new entries :)
>
> Thanks.

yes, i would be do it, but i have no idea how to do (:=)))))

Joern, have a take a look a little about this subsject ?

Gilles

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Gilles Caulier wrote:

> Le Vendredi 3 Février 2006 11:53, jdd a écrit :
>> Heiner Lamprecht wrote:
>>> Hi folks,
>>>
>>> does anybody have any experience in color management on Linux?  Are
>>> there any plans to add such functionality in digiKam?
>> already a doc about the plugins would be great :-)
>>
>
> What do you mean exactly about this point ?

I think the help is of little... help :-(.

unsharp mask is used to get a better sharpness, this I could
guess myself :-). But how does it works?

what are the basis of the underlying algorythm?

>
> The digikam handbook will be updated before 0.9.0 final release. There are a
> lot of jobs to do into digiKam documentation, especially about color
> management !
>
> I will very happy if any volomters can help us to update this part. This is
> not programmer task. You just need to have a correct English to write the
> book (it's not my case (:=))), but i'm learning)

I'm also french :-( and have no knowledge in color
management :-(

the problem is: to know how to use the sliders in the
plugins windows, one needs to have a minimum knowledge of
the algorythm. what means the radius? (what effect have...
)... and this is only an example.

I know this is difficult, but in some way, only the
developper can ask the question (I know you also have other
things to do :-)

In fact, ideally, there should be two writers: the dev to
say what is underlying and a power user to give hints of how
to use.

the "try and see" approach is not very effective :-)

and who is responsible of kipi plugins (I don't see them
elesewhere than digikam)

jdd



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[Gilles Caulier-2]

Le Vendredi 3 Février 2006 16:08, jdd a écrit :

> Gilles Caulier wrote:
> > Le Vendredi 3 Février 2006 11:53, jdd a écrit :
> >> Heiner Lamprecht wrote:
> >>> Hi folks,
> >>>
> >>> does anybody have any experience in color management on Linux?  Are
> >>> there any plans to add such functionality in digiKam?
> >>
> >> already a doc about the plugins would be great :-)
> >
> > What do you mean exactly about this point ?
>
> I think the help is of little... help :-(.
>
> unsharp mask is used to get a better sharpness, this I could
> guess myself :-). But how does it works?
>
> what are the basis of the underlying algorythm?
>
> > The digikam handbook will be updated before 0.9.0 final release. There
> > are a lot of jobs to do into digiKam documentation, especially about
> > color management !
> >
> > I will very happy if any volomters can help us to update this part. This
> > is not programmer task. You just need to have a correct English to write
> > the book (it's not my case (:=))), but i'm learning)
>
> I'm also french :-( and have no knowledge in color
> management :-(
>
> the problem is: to know how to use the sliders in the
> plugins windows, one needs to have a minimum knowledge of
> the algorythm. what means the radius? (what effect have...
> )... and this is only an example.
>

Heu, have you reading the current manual ???

http://docs.kde.org/development/en/extragear-graphics/digikamimageplugins/unsharp.html

If it's not enought, google is your friend :

http://www.scantips.com/simple6.html

My 10 cts €


> I know this is difficult, but in some way, only the
> developper can ask the question (I know you also have other
> things to do :-)
>
> In fact, ideally, there should be two writers: the dev to
> say what is underlying and a power user to give hints of how
> to use.

It's already the case between me and Gerhard about DigikamImagePlugins
handbooks writting

>
> the "try and see" approach is not very effective :-)
>
> and who is responsible of kipi plugins (I don't see them
> elesewhere than digikam)

Good question. I let's Joern and Tom explain to you the current status of
kipi-plugins

Gilles
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Gilles Caulier wrote:

> Heu, have you reading the current manual ???

I read the help given in the plugin windows (0.8.1 complide
recently), don't seems to be the one you quote (which is
obviously better :-)

>
> http://docs.kde.org/development/en/extragear-graphics/digikamimageplugins/unsharp.html
>
> If it's not enought, google is your friend :
>
> http://www.scantips.com/simple6.html
>
> My 10 cts €

but are all the plugins working the same?

well visibly digikam is improving fast very good :-)

NB: I made a _french, sorry_ story of my method of dealing
with my photo collection (below, last link)

thanks
jdd

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[Albert Wagner]

jdd wrote:
<snipi>
> unsharp mask is used to get a better sharpness, this I could
> guess myself :-). But how does it works?
>
> what are the basis of the underlying algorythm?
>
<snip>
This is from a different product, but I'm sure the explanation is the
same for all photo manipulation programs.

http://gimp-savvy.com/BOOK/

See section 6.4
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[Joern Ahrens]

On Friday 03 February 2006 16:16, Gilles Caulier wrote:
> Le Vendredi 3 Février 2006 16:08, jdd a écrit :

> > and who is responsible of kipi plugins (I don't see them
> > elesewhere than digikam)
>
> Good question. I let's Joern and Tom explain to you the current status of
> kipi-plugins

Nobody knows the current or future(?) state of kipi. If you wnat to know why,
read the latest thread from this week in [hidden email] archive.

... Jörn

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[Gerhard Kulzer]

Am Freitag, 3. Februar 2006 17:59 schrieb Albert:
> jdd wrote:
> <snipi>
>
> > unsharp mask is used to get a better sharpness, this I could
> > guess myself :-). But how does it works?
Gilles and I on one side we had already several discussions on the respective
advantages of unsharp mask and refocus. I believe in the end we convinced
everybody that refocus give the better results. Look into the ML archive if
you're interested.

Gerhard
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Albert wrote:

> jdd wrote:
> <snipi>
>> unsharp mask is used to get a better sharpness, this I could
>> guess myself :-). But how does it works?
>>
>> what are the basis of the underlying algorythm?
>>
> <snip>
> This is from a different product, but I'm sure the explanation is the
> same for all photo manipulation pr(...)

thanks. but I know how to use google.

I wanted just to point that it's best to have the result at
hand on the "help" button, given I'm not sure of what algo
is used by whom (I know nearly nothing of it)

I nevr could afford to learn GIMP and find showphoto much
simpler :-)

jdd


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