On 10/16/2014 03:37 PM, Øyvind Kolås wrote:
On Thu, Oct 16, 2014 at 6:52 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
Is there in fact general agreement among the devs that the criteria for
deciding when to use sRGB primaries instead of UserRGB primaries is
approximately as follows?
On 10/14/2014 08:50 AM, Simon Budig wrote:
for conversions between RGB working spaces there is no fundamental
distinction between XYZ and unbounded linear gamma sRGB.
There is one fundamental difference between XYZ as the real PCS and
sRGB as PCS (those are scare quotes; the terminology sRGB
On Fri, Oct 17, 2014 at 12:01 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/16/2014 03:37 PM, Øyvind Kolås wrote:
On Thu, Oct 16, 2014 at 6:52 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
Is there in fact general agreement among the devs that the criteria for
deciding
In the current babl/GEGL/GIMP code base, I counted five files that
contain functions that require a conversion from RGB to XYZ:
1. gimp/plug-ins/common/decompose.c
2. gimp/plug-ins/common/compose.c
3. gimp/app/core/gimpimage-convert-type.c
4. gegl/operations/common/image-compare.c
5.
Unfortunately for hard-coded sRGB as PCS, the ICC profile
specifications are a moving target. Right now the ICC profile illuminant
is always D50. But in the next planned release of new specifications,
things will change:
//begin quote from http://color.org/DevCon/devcon14.xalter
While this
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
//begin quote from http://color.org/DevCon/devcon14.xalter
While this fixed PCS is capable of delivering unambiguous color transforms,
it cannot support the increasing demand for spectrally-based reproduction.
[...]
Tying GIMP to sRGB as
On 10/17/2014 06:39 AM, Simon Budig wrote:
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
//begin quote from http://color.org/DevCon/devcon14.xalter
While this fixed PCS is capable of delivering unambiguous color transforms,
it cannot support the increasing demand for spectrally-based
On Fri, Oct 17, 2014 at 12:47 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
Tying GIMP to sRGB as PCS is a dead-end move.
If you take spectrally based reproduction as an argument against sRGB
as PCS you should be at least be so fair to also mention that *any* RGB
based image editing
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
On 10/17/2014 06:39 AM, Simon Budig wrote:
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
//begin quote from http://color.org/DevCon/devcon14.xalter
While this fixed PCS is capable of delivering unambiguous color transforms,
it cannot
On Fri, Oct 17, 2014 at 1:06 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/17/2014 06:59 AM, Øyvind Kolås wrote:
As a former researcher at a national color science laboratory, and a
major contributor to babl and GEGL; I probably have no idea about
these things – and how the
On 10/17/2014 07:08 AM, Øyvind Kolås wrote:
On Fri, Oct 17, 2014 at 1:06 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/17/2014 06:59 AM, Øyvind Kolås wrote:
As a former researcher at a national color science laboratory, and a
major contributor to babl and GEGL; I probably have no
On Fri, Oct 17, 2014 at 1:39 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/17/2014 07:08 AM, Øyvind Kolås wrote:
On Fri, Oct 17, 2014 at 1:06 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/17/2014 06:59 AM, Øyvind Kolås wrote:
As a former researcher at a national
On 10/14/2014 07:16 AM, Øyvind Kolås wrote:
On Tue, Oct 14, 2014 at 11:20 AM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/13/2014 06:36 PM, Elle Stone wrote:
So again, upon opening an image, how do you plan to detect whether the image
is an sRGB image or not?
Will you compare MD5
this.
Hugs and positivity,
Ed
-Original Message-
From: Elle Stone
Sent: Friday, October 17, 2014 4:43 PM
Cc: gegl-developer-list ; Gimp-developer
Subject: Re: [Gimp-developer] [Gegl-developer] babl roadmap: How do you know
which images are sRGB images?
On 10/14/2014 07:16 AM, Øyvind
On 10/15/2014 01:46 PM, Simon Budig wrote:
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
On 10/15/2014 08:30 AM, Øyvind Kolås wrote:
On Wed, Oct 15, 2014 at 2:11 PM, Elle Stone
When the user opens a color-managed fooRGB image, for which *specific*
editing operations will the image be
On Thu, Oct 16, 2014 at 6:52 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/15/2014 01:46 PM, Simon Budig wrote:
If I understand them correctly, Michael Henning and Jon Norby are saying
that the criteria is something along the lines of: For RGB editing
operations, use UserRGB
On 16 October 2014 21:37, Øyvind Kolås pip...@gimp.org wrote:
On Thu, Oct 16, 2014 at 6:52 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
On 10/15/2014 01:46 PM, Simon Budig wrote:
If I understand them correctly, Michael Henning and Jon Norby are saying
that the criteria is
On Fri, Oct 17, 2014 at 12:49 AM, Jon Nordby jono...@gmail.com wrote:
you are answering in detail 'how we will get there' but Elle (as I see it)
is asking more 'do you agree that we want to go there'. This leaves me
unsure if you are implicitly agreeing, if you disagree and have a different
On 10/14/2014 08:50 AM, Simon Budig wrote:
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
Are you planning on converting non-sRGB images to unbounded linear gamma
sRGB? Yes or no?
For pixel storage we will use whatever fits our needs, it does not make
sense at this point to specify
On Wed, Oct 15, 2014 at 2:11 PM, Elle Stone
When the user opens a color-managed fooRGB image, for which *specific*
editing operations will the image be converted to unbounded sRGB?
This isn't just an implementation detail. The answer to this question will
determine the path for writing code
On 10/15/2014 08:30 AM, Øyvind Kolås wrote:
On Wed, Oct 15, 2014 at 2:11 PM, Elle Stone wrote:
Will all color-managed image editing be done using the user's chosen
primaries, with absolutely no conversions to unbounded sRGB for image
editing?
Or are the developers committing themselves to
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
On 10/15/2014 08:30 AM, Øyvind Kolås wrote:
On Wed, Oct 15, 2014 at 2:11 PM, Elle Stone
When the user opens a color-managed fooRGB image, for which *specific*
editing operations will the image be converted to unbounded sRGB?
If the user
On 10/15/2014 01:58 PM, Michael Henning wrote:
Yes, the majority of operations will operate in myfavoriteRGB space,
but you seem to be operating under the premise that absolutely *no*
filters can possibly exist that require a specific color space to
function properly. This isn't the case.
Am Mittwoch, 15. Oktober 2014, 15:37:01 schrieb Elle Stone:
[...]
The guiding principle should be that except in these carefully bracketed
and clearly identified cases, the *user* controls the RGB working space,
and all RGB editing operations should use the user's chosen primaries.
It seems
On 10/14/2014 06:54 AM, Øyvind Kolås wrote:
So now all chromaticity-dependent editing operations will require a brand
new special specifying, unless the image is already an sRGB image.
If you didn't intend to convert all images to unbounded sRGB for editing,
there wouldn't be any reason to
On Tue, Oct 14, 2014 at 1:34 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
The above sentence confuses concepts: The babl architecture might require
that images to be converted to and from unbounded linear gamma sRGB. That
doesn't mean babl is a CMS. And it doesn't mean unbounded linear
On 10/14/2014 07:52 AM, Øyvind Kolås wrote:
On Tue, Oct 14, 2014 at 1:34 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
To convert images to and from unbounded linear gamma sRGB, you MUST pass
through XYZ. XYZ is the PCS.
I remind you that linear RGB spaces are a single matrix
Elle Stone (ellest...@ninedegreesbelow.com) wrote:
On 10/14/2014 07:52 AM, Øyvind Kolås wrote:
On Tue, Oct 14, 2014 at 1:34 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
To convert images to and from unbounded linear gamma sRGB, you MUST pass
through XYZ. XYZ is the PCS.
I remind
Hi Thorsten.
Thorsten Stettin (thorsten.stet...@gmail.com) wrote:
with all due respect to you, I think you should contribute instead to
babble.
If you perceive Elles texts as babbling it seems that this discussion
is way over your head and you might want to consider staying out of it.
Thanks,
On Tue, Oct 14, 2014 at 9:04 AM, Simon Budig si...@budig.de wrote:
If you perceive Elles texts as babbling it seems that this discussion
is way over your head and you might want to consider staying out of it.
+1.
I'll admit that this discussion is way over my head, but as it seems to
involve
Christopher Curtis (ccurt...@gmail.com) wrote:
I'll admit that this discussion is way over my head, but as it seems to
involve only two people would it be better handled over a phone call? It
appears that there are some basic assumptions that aren't in alignment.
While it certainly could be
Am 14.10.2014 um 15:04 schrieb Simon Budig:
Hi Thorsten.
Thorsten Stettin (thorsten.stet...@gmail.com) wrote:
with all due respect to you, I think you should contribute instead to
babble.
If you perceive Elles texts as babbling it seems that this discussion
is way over your head and you might
+1
On 14 October 2014 15:54, Simon Budig si...@budig.de wrote:
While it certainly could be more concise, the discussion has helped me
tremendously with my glimpse into gegl/babl. So while the
misunderstandings might be easier to overcome within a phone call
keeping the discussion on the list
On Tue, Oct 14, 2014 at 9:54 AM, Simon Budig si...@budig.de wrote:
While it certainly could be more concise, the discussion has helped me
tremendously with my glimpse into gegl/babl. So while the
misunderstandings might be easier to overcome within a phone call
keeping the discussion on the
Hi,
On Tue, Oct 14, 2014 at 3:58 PM, Thorsten Stettin
thorsten.stet...@gmail.com wrote:
Am 14.10.2014 um 15:04 schrieb Simon Budig:
Hi Thorsten.
Thorsten Stettin (thorsten.stet...@gmail.com) wrote:
with all due respect to you, I think you should contribute instead to
babble.
If you
On Mon, Oct 13, 2014 at 8:19 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
The sRGB as PCS architecture outline in babl/docs/roadmap.txt will likely
collapse under its own weight. The roadmap should be amended to reflect a
more accurate assessment of the amount of work the planned
On 10/13/2014 03:25 PM, Øyvind Kolås wrote:
On Mon, Oct 13, 2014 at 8:19 PM, Elle Stone
ellest...@ninedegreesbelow.com wrote:
As the purpose of the roadmap seems to be guiding future development, the
list of editing operations that rely on the chromaticities of the RGB
working space needs to
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