clehner
Joined: 07 Oct 2009
Posts: 1
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| Posted: Wed Oct 07, 2009 2:55 pm Post subject: Interdependence of Greyscale and Color Lightness |
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Hi,
thank you everybody for reading this.
There was a question in the Calibration Q&A which was not answered.
| Quote: | My plasma has ISF controls for specific primary and secondary colours, with a colour (saturation?) and tint (hue?) controls for each one. In the guide you mention adjusting then in the (Red), Green, Blue, Yellow, Cyan, and Magenta order after adjusting the "lightness" for the primaries.
Since I have no "lightness" control, am I right to assume that I can just set the saturation and hue for each colour, since the lightness has been set previously through the grayscale calibration? |
AFAIK greyscale tracking and correct color lightness (21.3 % red, 71.5% green etc. for REC709) is not automatically the same. I find this a little puzzling (but I know from practical calibration experience that this is really the case).
In other words: you can have very good D65 grey scale tracking but bad primary lightness (like 35% red and 60% green and 5% blue, which would be something called 'red push')? Am I missing something?
Can somebody give me a simple explanation for that? I am still trying to wrap my brain around an obvious fact.
Thanks.
Christoph
P.S.: Great forum!
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