Hi,
> in my example I use lab 85/0/114 85/-85/-120 and lab profile to SRGB > profile. > > the problem may also come an out of gamut color..... It is, indeed. It happens that both these colors are out of sRGB gamut. The monitor is not able to reproduce them, and the CMM does choose some other near colors by its gamut remapping algorithm. So, when you decrease L, the resulting color is also out of gamut, and depending on CMM, you will see it reddish, but this is because the original color, that one of Lab 85, 0, 144 has also this red component. But it is clampled by the monitor to its maximum red primary. If you have photoshop handy, try the colorpicker. The gamut warning pops up on these colors. Regards, Marti. ----- Original Message ----- From: "ADS" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, June 27, 2002 10:26 AM Subject: Re: [Lcms-user] CIELab and lightness > Hola Marti > > > No... L should control the luma, and leave hue alone. Your > > formula seems ok. > > don't think this problem come lcms or profile. > my main problem is that for some light color , darking it of 20% give a > small difference of lightness and other light colors it gives a very darker > color, that's why I wonder if the problem doesn't come from the formula. > > in my example I use lab 85/0/114 85/-85/-120 and lab profile to SRGB > profile. > > the problem may also come an out of gamut color..... > > > > > > ------------------------------------------------------- > Sponsored by: > ThinkGeek at http://www.ThinkGeek.com/ > _______________________________________________ > Lcms-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/lcms-user > > ------------------------------------------------------- Sponsored by: ThinkGeek at http://www.ThinkGeek.com/ _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
