notches on the L*axis
notches on the L*axis
- Subject: notches on the L*axis
- From: "eugene appert" <email@hidden>
- Date: Sat, 8 Dec 2007 09:42:47 -0500
Hello,
I am confused about how file data of equal brightness values are translated
to the target profile. I assumed that the file data range of 255 brightness
levels would have to be translated through the 100 L* distinctions in the
proifle connexion space. Yet I can see brightness distinctions on the screen
from RGB 1 toRGB 9 which should all translate to L*1 . When I first noticed
this I thought it was possible BPC was using the RGB data to remap the
brightness higher, but I notice the same the thing much farther up the
curve. My monitor regesters a distinction between RGB 72 and RGB 73 ( L* 30) which is maintained after converting to a target space. For example after a conversion to US swop coated v2, RGB 72 & 73 become 66%, 60% 58% 42% and 66% 59% 58% 41%, which both translate as L*30.
This phenomenon seriously challenges my understanding of colour management
Any help out of the rabbit hole would be greatly appreciated.
Eugene Appert.
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