Thanks for the responses. I see the problem now with working in the scanner color space. I actually have access to a nice drum scanner which is self-calibrating and whose color space is actually a well defined wide gamut RGB, but my home flatbed is far from that. I was just reading a lot about various wider gamut spaces and Bruce Lindblooms BetaRGB looks like a good candidate in that its primaries are closer to those of both of my scanners than AdobeRGB is.
Cheers, Richard -----Original Message----- From: Gerhard Fuernkranz <[EMAIL PROTECTED]> Sent: Sep 18, 2003 11:27 AM To: "Richard S. Ross" <[EMAIL PROTECTED]> Cc: [EMAIL PROTECTED] Subject: Re: [Lcms-user] profile conversions? Richard S. Ross schrieb: > My current workflow involves working with scanned files to which I > only 'assign' my lcms generated profiles in Photoshop. That is I use > the scanner profile as the working space and only perform an actual > conversion to a printer profile when I actually print. My thinking was > always, the fewer conversions the better. Is this correct or is more > damage being done by editing in the larger gamut scanner color space > than by performing multiple conversions? Monitor previewing always > involves conversion from your working space to the monitor profile, as > I understand it, so what advantages/disadvantages are there in using > another an additional profile/space in the process? Hi Richard, IMO it depends on wheter you also want to perform image processing operations in Photoshop. Many operations make assumtions, which are only fulfilled in typical working spaces like AdobeRGB or sRGB, but which are _not_ necessarily fulfilled in the scanner's RGB color space, e.g. R=G=B for all neutral colors. For instance, applying the same gamma to all three channels will keep neutral colors neutral in AdobeRGB or sRGB, etc., but it may change the chomaticity of neutral colors, if applied directly to RGB values in the scanner's color space. Therefore usually a working color space with well-defined properties is used to carry out the image manipulations. If you worry about accuracy, I recommend to use 16bpp for intermediate images and a wide-gamut working color space. Regards, Gerhard ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Lcms-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/lcms-user
