RE: Lightroom
RE: Lightroom
- Subject: RE: Lightroom
- From: "Tim Vitale" <email@hidden>
- Date: Tue, 10 Jul 2007 14:10:56 -0700
- Importance: Normal
> -----Original Message-----
> From: Andrew Rodney [mailto:email@hidden]
> On 7/10/07 11:50 AM, "Tim Vitale" wrote:
>
> > 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.
>
> Processing color space is linear encoded gamma using ProPhoto primaries.
D'oh... I knew that, I've read your essay.
LR is therefore using <D50 primaries> for processing the linear data (G1.0) output from
the imaging chip.
> Histogram and numbers are ProPhoto primaries and an sRGB TRC (kind of 2.2
> gamma encoding).
But, the screen display is done at D65 and G2.2 (sRGB TRC), right?
Or, is that wrong as well?
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>
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