Re: linearization - luminance, chroma or density?
Re: linearization - luminance, chroma or density?
- Subject: Re: linearization - luminance, chroma or density?
- From: Graeme Gill <email@hidden>
- Date: Mon, 22 Jan 2007 10:10:49 +1100
Ray Maxwell wrote:
All that is necessary, is to do an a* vs b* plot of step wedges for each
color. From this you can clearly see when you have achived maximum
chroma. Moving beyond this point is folly. You cannot get a larger
gamut than this point. You are only adding muddy density beyound this
point.
You can't know that for sure if you're only looking at a* and b* -
the gamut is 3D, so you need to be looking at L* as well, if
you really want to be sure that the gamut is at a maximum.
A colorant could double back in an a* b* projection, yet still be expanding
the gamut by decreasing the L*. Now for various good reasons you may choose
not to use some of that gamut, but it's still gamut you are forgoing.
Graeme Gill.
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