On Mon, Mar 21, 2011 at 5:30 PM, gespert...@gmail.com
wrote:
> Those operations are:
> - Combining the alpha channel of the pure C, M, Y, K areas with the
> corresponding separated channel via screen blending mode.
> - Converting desired CMYK percentages to grayscale values and fill the
> selectio
On 3/22/11, Jacek Poplawski wrote:
> I am familiar with this opinion. I don't want to continue offtopic
> discussion in this thread, so I just give one example: curves. You can
> get more interesting retouch when using curves in CMYK and in LAB and
> in RGB than using only RGB curves.
LAB curves
"No it isn't, because unless you go through a lot of extra work to
avoid it, colors in the image that the used CMYK color space is unable
to represent will get lost."
True.
Lot of work in studio then offset hardware will trow out different
things ..because : paper quality, paper type ( coated / u
2011/3/22 Jacek Poplawski :
> CMYK is also best colorspace for skin color retouch by numbers,
No it isn't, because unless you go through a lot of extra work to
avoid it, colors in the image that the used CMYK color space is unable
to represent will get lost.
/ Martin
--
My GIMP Blog:
http://
On Tue, 22 Mar 2011 09:14:43 +0100
Jacek Poplawski wrote:
> PS. CMYK is also best colorspace for skin color retouch by numbers,
> that's why I wanted to fix CMYK values in Gimp colorpicker, but there
> was big discussion on this mailing on this subject
Martin: I don't know if this originates wit
On 03/22/2011 08:20 AM, Martin Nordholts wrote:
> LAB values
> makes colorimetric sense by themselves, without any additional information.
Correction: For CIELAB values to make colorimetric sense, it is
necessary to also know the reference white point.
/ Martin
--
My GIMP Blog:
http://www.
My current workflow:
1) choose photos in Digikam, copy them to another folder
2) open photo in RawTherapee
3) try to get good colour and contrast in RT, fix highlights, etc,
then export to Gimp (RT has no layers)
4) use RGB curves in Gimp, sometimes decompose to RGB and combine
layers to create BW
On 03/22/2011 08:25 AM, Jacek Poplawski wrote:
> On Tue, Mar 22, 2011 at 8:19 AM, SorinN wrote:
>> Jacek - you don't need CMYK for photos ["I need CMYK support for photo
>> retouch, to create better colors"].
>
> I am familiar with this opinion. I don't want to continue offtopic
> discussion in th
On Tue, Mar 22, 2011 at 8:19 AM, SorinN wrote:
> Jacek - you don't need CMYK for photos ["I need CMYK support for photo
> retouch, to create better colors"].
I am familiar with this opinion. I don't want to continue offtopic
discussion in this thread, so I just give one example: curves. You can
g
Jacek - you don't need CMYK for photos ["I need CMYK support for photo
retouch, to create better colors"].
CMYK eventually will kill some nuances - being dependent on the paper
(or other support) color.
RGB colors on screen make use of luminance of the screen pixels - you
can have many nuances of
On 03/22/2011 01:37 AM, Jacek Poplawski wrote:
> On Mon, Mar 21, 2011 at 11:30 PM, gespert...@gmail.com
> wrote:
>> Most of the people ask for CMYK because:
>
> I need CMYK support for photo retouch, to create better colors.
> CMYK is no different than LAB, HSV or RGB. It is colorspace like
> oth
On Tue, Mar 22, 2011 at 4:52 AM, Alexandre Prokoudine
wrote:
> On 3/22/11, Jacek Poplawski wrote:
>
I need CMYK support for photo retouch, to create better colors.
CMYK is no different than LAB, HSV or RGB. It is colorspace like
others, but uses 4 channels instead 3.
>>>
>>> Right,
On 3/22/11, Jacek Poplawski wrote:
>>> I need CMYK support for photo retouch, to create better colors.
>>> CMYK is no different than LAB, HSV or RGB. It is colorspace like
>>> others, but uses 4 channels instead 3.
>>
>> Right, all colorspaces are equal, but some are more equal than others
>> :-)
On Tue, Mar 22, 2011 at 4:12 AM, Alexandre Prokoudine
wrote:
> On 3/22/11, Jacek Poplawski wrote:
>
>> I need CMYK support for photo retouch, to create better colors.
>> CMYK is no different than LAB, HSV or RGB. It is colorspace like
>> others, but uses 4 channels instead 3.
>
> Right, all colors
On 3/22/11, Jacek Poplawski wrote:
> I need CMYK support for photo retouch, to create better colors.
> CMYK is no different than LAB, HSV or RGB. It is colorspace like
> others, but uses 4 channels instead 3.
Right, all colorspaces are equal, but some are more equal than others
:-) The willingnes
2011/3/21 Jacek Poplawski :
> On Mon, Mar 21, 2011 at 11:30 PM, gespert...@gmail.com
> wrote:
>> Most of the people ask for CMYK because:
>
> I need CMYK support for photo retouch, to create better colors.
> CMYK is no different than LAB, HSV or RGB.
Well, CMYK is quite different than LAB actuall
On Mon, Mar 21, 2011 at 11:30 PM, gespert...@gmail.com
wrote:
> Most of the people ask for CMYK because:
I need CMYK support for photo retouch, to create better colors.
CMYK is no different than LAB, HSV or RGB. It is colorspace like
others, but uses 4 channels instead 3.
Instead focusing on CMYK
Hi. Although it's a good idea to have the separate- plugin bundled in
default GIMP installation, I'd like to discuss some enhancements that
could be done in its bigger brother Separate+ to make it more
functional for people who needs more advanced CMYK usage.
The idea is quite simple and wouldn't e
On Sat, Mar 12, 2011 at 5:15 PM, Yoshinori Yamakawa
wrote:
> Hi,
>
> According to the GIMP Roadmap, it seems to take time very much for the
> CMYK support to be added to the GIMP.
>
> Now we can use the separate+ plug-in, but I think that the separate+
> plug-in is not proper for the GIMP distribu
Hi,
According to the GIMP Roadmap, it seems to take time very much for the
CMYK support to be added to the GIMP.
Now we can use the separate+ plug-in, but I think that the separate+
plug-in is not proper for the GIMP distribution because the separate+
plug-in has unnecessary features for general
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