RE: Color accurate workflows (was in search of a D50 Editing colorspace)
RE: Color accurate workflows (was in search of a D50 Editing colorspace)
- Subject: RE: Color accurate workflows (was in search of a D50 Editing colorspace)
- From: Lars Borg <email@hidden>
- Date: Wed, 10 Sep 2014 03:23:09 +0000
- Thread-topic: Color accurate workflows (was in search of a D50 Editing colorspace)
Weird. But aren't your tests totally thrown odd by the fact that prophoto gamut is much bigger than your display?
What if you use an in gamut color?
Lars Borg
Adobe
Typos generously provided by the phone
-------- Original message --------
From: Andrew Rodney
Date:09/09/2014 2:19 PM (GMT-10:00)
To: ColorSync List
Subject: Re: Color accurate workflows (was in search of a D50 Editing colorspace)
On Sep 9, 2014, at 5:41 PM, edward taffel <email@hidden> wrote:
> yes i follow, but this is just a sample from the display’s rgb & converted back to the original space; whereas, if exact rgb or lab coordinates (from a potentially much wider gamut source) for the pixel under examination are desired, it is necessary to map to the corresponding point in the image data to get serviceable data—this is what i meant.
Yes, I believe so. But based on a new test, I'm not sure what is really happening under the hood.
Here's what I did. Made a document in ProPhoto RGB with a value of 0/245/0. Photoshop of course shows that value in the info palette.
I then save that with the embedded profile to the desktop as a TIFF.
In the finder (10.9.4). I click the space bar to show the image using the Finder. Visually it does NOT match what I see in Photoshop!
I open the Digital Color Meter and set it for Display Native Value and get 144/248/50.
I use Photoshop's sampler tool to read the color, it shows the same number (144/248/50).
The Finder seems totally confused about how to preview this data! But both Photoshop and DigitalColor Meter show the same values.
Now I open that ProPhoto RGB document in Preview. It is color managed and it does appear visually the same as Photoshop. But this is odd, DigitalColor Meter reads it as 0/255/0! That's wrong.
Andrew Rodney
http://www.digitaldog.net/
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