noise.
Regards,
Esben H-R Myosotis
Software Engineer
Phase One
> -Original Message-
> From: marti.ma...@littlecms.com [mailto:marti.ma...@littlecms.com]
> Sent: 31. oktober 2014 02:57
> To: Esben Høgh-Rasmussen Myosotis
> Cc: Lcms-user@lists.sourceforge.net
> Subject: Re
Thank you Marti - that was fast.
> -Original Message-
> From: marti.ma...@littlecms.com [mailto:marti.ma...@littlecms.com]
> Sent: 31. oktober 2014 02:57
> To: Esben Høgh-Rasmussen Myosotis
> Cc: Lcms-user@lists.sourceforge.net
> Subject: Re: [Lcms-user] Chromatic ad
Ok, I've checked this with Phil Green, the ICC technical secretary and
with Ronnie Luo, who most of you already know.
The typo is in Lam's paper. The reference Phil gives is Hunt, R. W. G.
'Reversing the Bradford chromatic adaptation transform', Colour
Research and Application 22 pp355-356,
Hi,
Thanks for reporting, I am bringing this issue to the ICC.
Regards
Marti
Quoting Esben Høgh-Rasmussen Myosotis :
> Hello there.
>
> I am looking into the pit known as chromatic adaptation and noticed
> something strange.
>
> In the ICC specification, Bradford adaptation is based on the
Hello there.
I am looking into the pit known as chromatic adaptation and noticed something
strange.
In the ICC specification, Bradford adaptation is based on the following
XYZ/cone-space conversion matrix:
[ 0.8951, 0.2664, -0.1614 ]
[ -0.7502, 1.7135, 0.0367 ]
[ 0
Thank you Kai-Uwe. I suppose I have to explain myself a little more.
The idea is to create a conversion chain from a Lab value to a L’a’b’ value
using a known n-color profile. So the chain is: Lab > n-color > L’a’b’. As
some Lab values can be outside the n-color gamut of the profile, there will
Am 23.03.11, 19:13 +0100 schrieb Rémi CERISE:
Please, could someone tell me if there is something special to do when using
a cmsHTRANSFORM with INTENT_RELATIVE_COLORIMETRIC ? The fact is chromatic
adaptation is not done properly with my transform and I would like to know
what I am doing wrong.
Hi all,
Please, could someone tell me if there is something special to do when using
a cmsHTRANSFORM with INTENT_RELATIVE_COLORIMETRIC ? The fact is chromatic
adaptation is not done properly with my transform and I would like to know
what I am doing wrong.
This is a Lab to n-color conversion
> The answer is, your sRGB values are chromatically adapted> to D50 using Bradford, so they are not correct at all. Hi Marti,thank you, that was of great help! I’m not quite sure, if I understand where chromatic adaptation fits into the picture of the whole processing chain of color managemen
