Re: [Lcms-user] Transform difference with older versions.

2010-06-02 Thread marti . maria
Quoting Kai-Uwe Behrmann : > Am 02.06.10, 14:09 +0200 schrieb marti.ma...@littlecms.com: >> The point here is that no gamut information is encoded in the profile. >> If you want to take the 0..255 cube as the gamut, that's fine but does >> not mean the monitor gamut is such cube. For example, a mo

[Lcms-user] Transform difference with older versions.

2010-06-02 Thread Prevost Jerome
.com [mailto:marti.ma...@littlecms.com] Envoyé : mercredi 2 juin 2010 12:48 À : Prevost Jerome Cc : lcms-user@lists.sourceforge.net Objet : Re: [Lcms-user] Transform difference with older versions. Hi, You are seeing the unbounded mode in action, which is a feature, not a bug. See a posting on my b

Re: [Lcms-user] Transform difference with older versions.

2010-06-02 Thread Kai-Uwe Behrmann
Am 02.06.10, 14:09 +0200 schrieb marti.ma...@littlecms.com: > The point here is that no gamut information is encoded in the profile. > If you want to take the 0..255 cube as the gamut, that's fine but does > not mean the monitor gamut is such cube. For example, a monitor can > deliver the same phys

Re: [Lcms-user] Transform difference with older versions.

2010-06-02 Thread marti . maria
Quoting Kai-Uwe Behrmann : > I find it great to see XYZ<->sRGB conversions becoming reversible. > However, I would expect the gamut is still visible for real devices. > sRGB is not a device but more of a colour space. Exactly. You got the point. And as a such it has no defined gamut other than

Re: [Lcms-user] Transform difference with older versions.

2010-06-02 Thread Kai-Uwe Behrmann
I find it great to see XYZ<->sRGB conversions becoming reversible. However, I would expect the gamut is still visible for real devices. sRGB is not a device but more of a colour space. Without having yet looked at, does Lab still collapse to device gamut in a PCS->Device conversion? Device is r

Re: [Lcms-user] Transform difference with older versions.

2010-06-02 Thread marti . maria
Hi, You are seeing the unbounded mode in action, which is a feature, not a bug. See a posting on my blog about that: http://littlecms2.blogspot.com/2009/09/unbounded-cmm.html If you use sRGB, which is a matrix and a set of curves, where is the gamut information? Right, the gamut is defined by th

[Lcms-user] Transform difference with older versions.

2010-06-02 Thread Prevost Jerome
Hello, For profiles without any gamut information (like display profiles) , I use to use a < back and forth > transform PCS->Device->PCS using the CreateMultiprofileTransform() function. When I transform the Lab boundary, I got something similar to the gamut boundary of the profile. As I'm migr