Hi, >When applying the picker template, I often get the warning "Patches .... >clipped".
Many people has asked about that. Let's try to do some explanation. Targets does have several patches set to very high amount of chroma/saturation, for example, in Wolf Faust targets, columns 8 and 12 have values of a,b in Lab space, way off neutral. For these patches, most devices (scanners, cameras) are not capable to capture the full amount of color. Take for example B8. This is a red patch with a Lab of about (40, 60, 51). That is very saturated! So, since the device is probably unable to take all the red in this patch, red channel hit 255. That is, red channel got "saturated" and hence red is "clipped" to maximum, which is 255. And this is the meaning of that informative messages. You got some patches "clipped" as an indication of device being unable to capture the enormous gamut of Wolf target. This is not bad per se. The profiler does understand and use those patches to build gamut hull. In fact, no clipped patches would be an indication of some going wrong, or a very, very wide gamut. Such big gamut would be not good at all, on smaller the device gamut, the better the image quality. Perhaps I should change the message to "gamut boundary detected" :-) Regards, Marti Maria The little cms project http://www.littlecms.com [EMAIL PROTECTED] ----- Original Message ----- From: "T E Schmitz" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Saturday, February 07, 2004 9:47 PM Subject: [Lcms-user] Profiler - patches clipped Hello, When applying the picker template, I often get the warning "Patches .... clipped". Under which circumstances do patches get clipped? Very often A13-A19 are effected and also column 15, and DMIN, DMAX. What effect does this have on the profile? Thank you for your time. -- Best Regards, Tarlika Elisabeth Schmitz ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
