You should try : http://gmic.sourceforge.net/gimp.shtml I make a screenshot for you here :
www.anioninternational.com/images/GMIC-for-GIMP.png

OR

you can try LAB Curves for GIMP : http://www.mm-log.com/lab-curves-gimp Sourceforge here : http://sourceforge.net/projects/mmfilters/files/

2010/8/18 :

Hello,

sorry it is a german text, but looking at the pictures might say enough:

 http://eye.de/tip_labstaerken.shtml

Theese feature of changing color tones is, what I'm looking for since a while.

It's necessary to have Lab-mode, which seems to be nonsense to some developers, but the results show me: it makes sense to use that mode.

Maybe not as underlying representation, but available to users it should be.

Maybe a conversion filter that makes RGB->Lab and Lab->RGB, available for users (and their scripts) would be helpful.

Ciao,   Oliver
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Maybe a conversion filter that makes RGB->Lab and Lab->RGB, available for users (and their scripts) would be helpful.

You can already decompose an image to LAB, work on the greyscale representations of each channel, then re-compose. This is what I have done when working in LAB space with scripts. There is a loss of data due to the 8 bit quantization in the conversion each way, but sometimes this is still better than nothing.

-Rob A>

On 8/18/10, oliver wrote:

sorry it is a german text, but looking at the pictures might say enough:

http://eye.de/tip_labstaerken.shtml

Theese feature of changing color tones is, what I'm looking for since a while.

Just use LabCurves

http://www.mm-log.com/blog/2010-07-09/adaptive-saturation-curve-labcurves

Or do everything in darktable

It's necessary to have Lab-mode, which seems to be nonsense to some developers

This is simply not true

Alexandre Prokoudine http://libregraphicsworld.org

..sure - better you can use Darktable - is a work in a fast progress - and has a lot of PRO features - is almost the same like Lightroom from Adobe
for just basic photographic work Darktable is OK - you can use GIMP for compositions AFTER you do the your primary color processing in Darktable.

It's up to you - I use Darktable only for pure photo color correction. Mostly, I use GMIC in GIMP because is integrated with a lot of other powerful features
and I make compositions 90% of time.

More about Darktable here: http://darktable.sourceforge.net/features.shtml About LabCurves - if you use Linux - saturation curve will not work if you not compile and install lcms 2 first (lcms 2 is not default in most distributions).

2010/8/19 Alexandre Prokoudine :

On 8/18/10, oliver wrote:

sorry it is a german text, but looking at the pictures might say enough:

  http://eye.de/tip_labstaerken.shtml

Theese feature of changing color tones is, what I'm looking for since a while.

Just use LabCurves

http://www.mm-log.com/blog/2010-07-09/adaptive-saturation-curve-labcurves

Or do everything in darktable

It's necessary to have Lab-mode, which seems to be nonsense to some developers

This is simply not true

Alexandre Prokoudine http://libregraphicsworld.org
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Hi,
 
How to unsubcribe my ID from this mailing list  
--Sanjeev

Hello,

On Thu, Aug 19, 2010 at 2:08 PM, sanju More wrote:

Hi,

How to unsubcribe my ID from this mailing list

--Sanjeev

You can unsubscribe in the mailing list page - https://lists.xcf.berkeley.edu/mailman/listinfo/gimp-developer

~ LightningIsMyName