RE: Lightroom
RE: Lightroom
- Subject: RE: Lightroom
- From: "Tim Vitale" <email@hidden>
- Date: Tue, 10 Jul 2007 10:50:35 -0700
- Importance: Normal
I have had the same issue with Lightroom...
--------Steve Bye wrote --------
> Since no color space is defined in Lightroom until the raw file is actually
> exported to tiff, psd, or jpg, the RGB values cannot be determined.
This may be the way it is looked at, but I understand that Lightroom uses ProPhoto RGB
(D50@G1.8) at D65 and Gamma 2.2 for 16-bit processing, and will apply that WS unless
another is chosen.
I have always assumed they used percentages because it was easier to understand by the lay
user, the main target of Lightroom. In reality, after complaining to myself and others,
the use of "0 to 1" values for RGB, is the standard usage in color calculation. It is
certainly the case on Bruce Lindbloom's site where you can switch between RGB scales.
I would prefer to be able to use 0-255, or whatever, since they are using 16-bit space
(15-bit+1 "values" in PS) for processing. Oh... maybe that is the reason, they are
working in 15+1/16 bit space and those numbers would confuse all most anyone.
Tim Vitale
Paper, Photographs &
Electronic Media Conservator
Film Migration to Digital Format
Digital Imaging & Facsimiles
Preservation & Imaging Consulting
Preservation Associates
1500 Park Avenue
Suite 132
Emeryville, CA 94608
510-594-8277
510-594-8799 fax
email@hidden <http://briefcase.yahoo.com/email@hidden>
[use of the above URL may require a "Yahoo! ID" to download files]
> -----Original Message-----
> From: colorsync-users-bounces+tjvitale=email@hidden
[mailto:colorsync-users-
> bounces+tjvitale=email@hidden] On Behalf Of Roger Breton
> Sent: Monday, July 09, 2007 5:24 PM
> To: ColorSync
> Subject: Lightroom
>
> Does anyone know whether there is an option for displaying RGB values in
> 0-255 standard Photoshop notation, as opposed to the ACR-type RGB
> percentages?
>
> Roger Breton
>
>
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| References: | |
| | >Lightroom (From: Roger Breton <email@hidden>) |