Re: ProPhoto RGB or Adobe RGB 1998
Re: ProPhoto RGB or Adobe RGB 1998
- Subject: Re: ProPhoto RGB or Adobe RGB 1998
- From: Steve Upton <email@hidden>
- Date: Sun, 11 Jan 2004 01:14:32 -0800
At 12:18 PM -0800 1/10/04, David B. Miller wrote:
>
Using PS CS's camera RAW I open my Canon EOS 10D images. I have been choosing ProPhoto RGB. I keep everything in 16 bit. Then the file is sent to my Epson 9600 with Ultrachrome inkset and matte black ink.
>
>
My question is, what am I loosing, if anything in the final print, by being in ProPhoto RGB the entire time? Should I save the RAW file in Adobe RGB 1998 instead? I don't believe the Epson 9600 can print the gamut of the ProPhoto RGB.
If your original image colors are outside of Adobe RGB then there may be benefits from using ProPhoto RGB. At the moment there are no perceptual intents that will map colors from camera or working space profiles as you move to smaller spaces - excluding print profiles. In other words when you move from camera/scanner profiles or large working space profiles to smaller working spaces, colorimetric intents are the only ones available - with the associated gamut clipping...
So, there is a sound workflow in using large working spaces to "normalize" out of larger gamut camera/scanner profiles. Then, leave the gamut compression to the perceptual intent of the print profile. Assuming the file is in 16 bits it may be the highest quality workflow to use.
v4 profiles may help with more standardized perceptual mapping and more support for perceptual tables out of device spaces...
Regards,
Steve
________________________________________________________________________
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
o email@hidden 206.985.6837
o ColorGear ColorThink ColorValet ColorSmarts ProfileCentral
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