Thread-topic: Working color space of Aperture/Lightroom
On 7/25/07 6:26 PM, "Nov06" wrote:
> I just had an idea, playing around with gradients. If Lightroom uses
> a variation of ProPhoto as working space, should creating a pure grey
> gradient tiff in PS with ProPhoto as the working space and importing
> it into Lightroom show the equal values for red, green, blue over the
> whole gradient?
The processing color space LR uses is ProPhoto primaries and a linear gamma.
The numbers provided (in percentages) is Melissa RGB (aka Bastard RGB) which
is ProPhoto RGB using a sRGB 2.2 TRC. However, the values should be R=G=B
using those numbers.
> And should adjusting the curve for example keep
> things as neutral greys?
It should. Are you seeing something different?
> If this works, one could start testing which color space has the
> behaviour in Aperture (hint: it's not Adobe RGB).
I was under the impression the underling color space used for processing in
Aperture was Adobe RGB but for whatever reason, Apple doesn't want to tell
us what exactly is happening under the hood. What makes you say its not
Adobe RGB (perhaps using a linear TRC)?
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