A/B Color contrast in develop module

It would be really nice to hace a slider (or three, I'll explain) for "color contrast".
Threre is "contrast" slider that influences the luminosity basically. What I would want to have is a way to control color contrast while preserving luminosity as well as preserve color balance.
A single slider implementation
Basically the simplest way (but a bit crude) to do it would be with a single slider.
The slider defaults to 0.
Moving it to the right would be equivalent to the following photoshop procedure:
Change mode to LAB
Curve adjustment
Steepen both the A and B curves linearly (pull extreme points in and leave the curve straight, plus keep the center where it is to preserve color balance)
Leave the L curve alone
Apply
switch mode back to RGB
Moving it left would be the same, except the AB curves would be made shallower rather than steeper (rotate the curve clockwise instead of counter clockwise about the center)
A two slider implementation
Same as the above, except that you would have separate A and B sliders (you might call the tint contrast and temp contrast to be consistent with the color balance sliders, which are just like moving the center point of the AB curves)
A three slider implementation
Basically this is like having bothe the one slider ("overall color contrast") and the two sliders ("temperature contrast" and "tint contrast"). It's a bit redundant but having the single control there makes it easier when you simply want to globally increase the color contrast without being too picky about the two separate controls (I guess easier for beginners)

Not at all. The saturation control has quite a different effect that this, and much les subtle. Saturation just increases saturation without changing the hue. This actually changes the hue causing a separation in hues that is impossible to achive in any manuver you would to in RGB space. It drives colors apart rather than increasing their chroma.
Try it yourself on a few images (especially on images that have nearly uniform color, such as deserts or faces. You will see that this is an entirelty different thing than saturation.

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    first i need to KNOW officially how thigns work, if ucan offer me a proof i'd gladly accept that.
    second, as i said, adobe might have think about that, is a request area and i have theright to request what I think is usefull to me.
    i ask for more CONTROL, what is wrong about that?
    i also request for 2 alteration using the same filter, NR in this case, once at the beggining and one at the eng of the developing process, i am also entitled to ask for such a thing, right?
    qith all due respect, if u do not have similar needs please allow me to ask , understand and not suppose adobe thought of everything and there is no better way, ok?
    here is a quote from a XMP file, i PRESUME the order if operation inside that file is the one processes are piped, am i wrong again?
    5.3
       As Shot
       4900
       -2
       -0.57
       15
       +79
       -7
       +33
       25
       39
       18
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       17
       -21
       29
       +10
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       +60
       0
       -24
       0
       +19
       0
       -24
       0
       0
       0
       0
       0
       0
       0
       0
       0
       0
       25
       50
       75
    +1.0
       25
    0
       0
       False
       Medium Contrast
         0, 0
         32, 22
         64, 56
         128, 128
         192, 196
         255, 255
       ACR 3.3
       8E1722706FEF96E97D62F657E50DF272
       True
       False
    so ,as u see i spaced the noise reduction fucntions in order to make them more visible, i can;t use colors to underline what i consider important, ok?
    SO, as u can see here, WB, exposure, contrast, SHARPNESS, brightness, SHADDOWS are ALL listed BEFORE noise reduction...
    later on the end of the list there is ANOTHER sharpening listed, so double fiter IS ALREADY applied, thus possible, right???
    again, ALL fiters applied BEFORE NR influences noise levels, all increse noise, more or less....
    WB influences exposure, try to go 50000 and see where hystogram goes to the right...
    exposure also increase noise in shaddow areas.
    contrast increse noise.
    brightness also influence noise.
    Shaddows are working exactly on most noisiest levels, the shades...
    sharpness before NR??? indeed, is "well thought"...
    so, Lee jay, seems i am not that wrong after all, isn't it???
    i really hope that order inside XMP to mean nothing but i really doubt is meaningless ...
    and again, even if a were wrong, i am entitled to ask explanations as i pay for this product. I also am entitled to ask for what i consider improvements, if Adobe decide to implement or not is another discussion...
    a little "friendlier" tone in your replies would also be apreciated, thank you in advance. i hope u do not work for Adobe ;)
    so, i am waiting for documented proofs related to my questions, thank you Adobe.

  • Library Module view of Photo different than Develop Module Version

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