Re: ProPhoto RGB an ROMM-RGB in Photoshop
Re: ProPhoto RGB an ROMM-RGB in Photoshop
- Subject: Re: ProPhoto RGB an ROMM-RGB in Photoshop
- From: <email@hidden>
- Date: Thu, 24 Aug 2006 10:28:12 -0400
Klauss,
If I recall correctly, ROMM-RGB uses a 2.2 gamma while
ProPhoto is based on a 1.8 gamma.
Danny
email@hidden
www.BabelColor.com
On Thu, 24 Aug 2006 15:30:47 +0200
Klaus Karcher <email@hidden> wrote:
Photoshop CS2 offers "ROMM-RGB" profiles in two flavors:
- "ProPhoto RGB", a ICCv2.1 profile located at
/Library/Application
Support/Adobe/Color/Profiles/ProPhoto.icm
and
- "ROM-RGB", a ICCv4 profile "hardwired" in the ACE *
Assigning both profiles to the same image makes no
difference on screen
(as expected), but using them in a conversion leads to
different results.
Who can explain what's happening?
Thanks, Klaus
*) The easiest way to "liberate" it is assigning it to
an image in
Photoshop and afterwards extracting it from there, e.g.
with the
"Extract profile" AppleScript. If you prefer a "harder
way": the profile
is caught in /Applications/Adobe Photoshop CS2/Adobe
Photoshop
CS2.app/Contents/Frameworks/AdobeACE.framework/Versions/a/AdobeACE,
starting at offset 0x9d420 ;-)
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