New RGB Tone Curve also a Basic Levels Adjustment?

Adobe Staff: at first I was pleased and then let down about the new RGB Tone Curve feature because I thought it allowed for Levels Addustments - as with so many other photo editing software including Adobe PS Elements where you can squeeze in the left and right triangles to ajust the blacks and highlights and midtones.
I was playing with the Lr4b RGB curve yesterday and - is it correct that it does essentially act the same as "Levels Adjustment" by squeezing inwards the blacks (lower left) and whites (upper right) points?
Thank-you

Yeah, but blacks and whites in the basic panel are better, and usually should be applied after you've appled the others.

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New RGB tone curve is absent in my LR4 upgrade. How do I get it to emerge?

help please

Click on the little curve icon at the bottom right-hand corner of teh Tone Curve panel. See screenshot:

Camera Raw - Enable RGB Tone Curves

In Camera Raw, the Tone Curve Channel selection is disabled. How can I enable it to allow me to adjust specific colors in Camera Raw?
I’m using Photoshop CS5, Camera Raw version 6.7.0.339 on a Windows Vista 64 bit system, and my camera is a Nikon D90.
Thanks,
Jack

I don't think you can...ACR 6.7 was a crossover version tho have compatibility with LR 4 when it was released, as a result it was set to allow processing of certain features that were in LR 4 (and ACR 7). While the RGB curves show up dimmed, I don't think ACR 6.7 allows actually adjusting the RGB curves. I think the only way to get them is update to CS6 and ACR 7.x.

I am working in the Develop module of Lightroom 5 and have accidentally bumped a setting and lost the Basic menu and the option to retrieve it. "Tone curve" is directly under the tool bar now. How can I retrieve the "Basic" menu?

How can I retrieve the "Basic" menu on Lightroom 5? I accidentally bumped something while working in the Develop module of Lightroom 5, and now the Tone Curve menu is directly under the Tool Bar, with no option to click on "Basic."

Right-click on Tone Curve and choose basic again or press Ctrl+1 in Develop.
On Mac (Control-Click or Cmd+1)

DNG PE: I want to try other Tone Curve but ...

In DNG PE I load a dng file, I choose a camera profile, I go in the Tone Curve panel in the Base Tone Curve I set Linear, I click on the curve and I set in 95 out 160 (only one point for this purpose) and then I save the new profile.
I go in ACR, I load an image and I switch to new camera profile: the image become very light.
I launch the DNG PE, load the previus created camera profile, click on Show Tone Base Curve: the showed curve is not parent with that I created (95 in 185 out, see below in black what I have created, in red what the profile has registered)

Hi Marco,
This is mostly (*) possible, but not directly via the DNG PE. The issue is the encoding space. Your RGB tone curve that you describe above is defined in a gamma 1.8 space (since ProPhoto has a gamma encoding of 1.8 ). The (black) tone curve interface in DNG PE is defined in a gamma 2.2 space.
In other words, if x is a linear signal and x' is the transformed linear signal, then the math for the former case is effectively
x' = x ^ 1/1.8
x' = ApplyToneCurve (x')
x' = x ^ 1.8
whereas the math for the latter case is the same except for the use of 2.2 instead of 1.8.
You will need to perform the appropriate transformation so that your 1.8-relative tone curve is expressed properly in a 2.2 space.
Once you have the actual numeric curve worked out, one way to make the required tone curve is to edit the .dcpr (recipe) file from the DNG PE using a text editor.
(*) The reason I say "mostly" is because another detail is that the PS RGB tone curve is a 1D curve applied separately to each channel. This is not the way the tone curve works in Camera Raw.

Tone curve RGB

I am trying to alter individual RGB channels within the tone curve box, but I don't get a pop up dialoge box. I saw a mention of PV 2010 and PV 2003, but I don't know what these are, or if one can convert to them.

Look in the camera calibration panel and it will tell you. Alternatively, if you're seeing the current set of sliders in the basic panel (e.g. highlights, shadows, etc.) then that would confirm you're using PV2012.
Go to tone curve, click on the little curves button at the bottom, and you'll be in point curve mode. Click on the RGB button to choose a colour channel.
As you're on the web, I recommend searching for "process version Lightroom" to find out more about that side of things.
M

Feature Request: RGB Histograms / Tone Curves

Hi team,
It would be really helpful to be able to view the RGB Histograms separately in addition to a composite (rather than the "compact" mode we have now).
It would also be really helpful to be able to adjust the Tone Curve applied to an individual RGB channel in Develop.
Finally, it would be most helpful to be able to see the RGB values as well as or instead of the RGB percentages when moving the cursor over an image area. This would be particularly helpful for fine-tuning skin tones.
Thanks, and keep up the great work.
We're delighted you're evolving Lightroom!
Cheers,
Matthew

Your post seems to assume that Lightroom is a tool for travel/landscape photography, and other types of photography (e.g., portrait/fashion) should be supported by a "specialized add-on module". I have to disagree with you on that point. Considering many of the examples on the Lightroom marketing are fashion shoots, I would think that they considers portrait/fashion photographers to be an important part of their target audience. They are not a fringe group of specialists.
I'm sure that portrait/fashion photographers would feel the same way about a Lightroom capability that primarily benefits the workflow of a travel/landscape photographer, i.e., when I do do some landscape work, I just edit in Photoshop. But you wouldn't agree to that, would you?
Skin tone measurement can be an incredibly easy tool to implement. It can be something as simple as showing the CMY values alongside the RGB values during a mouseover. Keep in mind, I'm talking about CMY not CMYK, so there should be no need to worry about what ICC profile to use. RGB to CMY is a straightforward transformation. It's embarassingly simple.
There are other ways Adobe can implement skin tone management that would be more powerful but a little more complicated. Those would be great too.
Anyway, thanks for the link to the Adobe feature request page! I will use it.
Regards,
Mike

Does the Tone Curve operate in RGB or Lab?

I was wondering if the Tone Curve of LR works in the RGB color space, or if it is designed to only affect the L component of Lab.

(Andrew_Rodney) wrote:
This new PDF might be useful to the discussion too:
http://www.luminous-landscape.com/essays/Curves.shtml
Looks like the file has been removed. Does anyone have a copy or another link?
Been fighting with some images recently, getting yellow faces when increasing contrast (curves or slider).

LR4.1 - Tone Curve - how to adjust individual RGB channels?

Hi,
I am having trouble figuring out how to adjust the curve of individual RGB channels. I am assuming the LR4 Tone Curve works like the PS Curves dialog with the channel dropdown.
The LR4.1 Help says:
To make adjustments to individual points on the tone curve, choose an option from the Point Curve menu, click the Edit Point Curve button , and do any of the following:
Choose an option from the Channel pop-up menu. You can edit all three channels at once, or choose to edit the Red, Green, or Blue channel individually.
When I click the little icon in the lower right corner of the Tone Curve panel, the panel shrinks so that I don't see the Regions sliders. If I click again, they are visible again. I can't find where to select one of the three indvidual channels.
The Help refers to "the Point Curve menu." Where is the Point Curve menu? Is the Point Curve different from the Tone Curve?
If I right-click (Windows) in the curve dialog, the context menu has a Show Info option. I click it on/off and don't see any change or any info. Where should I be looking for info?
Thanks for any help here.
John

Good morning John,
The point curve is the one without the sliders. The adjustments for the individual channels are only available with
PV2012. You must be editing a file with PV2010 or 2003. When in PV2012 you will see " Channels: RGB" below the curve window. Click on the doule triangles following the RGB
to pick the individual channel.
HTH
Rich

RGB Channel Curves or Levels

Hello,
I would like to see the ability to adjust the black and white point of the R, G, and B channels independently, as can be done in Aperture and PS, as well as the tone curve for each channel. I like the LR interface and UI approach very much, so I would be looking for something that fits into this frameworkperhaps a "Red", "Green", and "Blue" tab at the top of the tone curve window as we now have for Hue, Saturation, and Luminance in the HSL panel?
Also, a thanks for the 0 - 100% readouts. I find this fantastic, and wish I had this option for readouts in PS!
Many Thanks,
Michael Morrison

Agreed. This is a much needed feature!!

I have lost my "Basic" panel in the Develop module and can't figure out how to get it back. My right panel goes from the Histogram straight to the Tone Curve panel. My Basic panel should be below the Histogram. Any ideas how to get it back. I have even

I have lost my "Basic" panel in the Develop module and can't figure out how to get it back. My right panel goes from the Histogram straight to the Tone Curve panel. My Basic panel should be below the Histogram. Any ideas how to get it back. I have even uninstalled my lightroom and reinstalled it with same issue. Help!!!

Right click on or near one of the other headers and a pop-up will appear and you will be able to select the Basic Panel for viewing.

RGB Channel unavailable in Camera Raw under point in the Tones Curve

How can I use the the RGB channel in Camera Raw under Tone Curve?

Hi yariel83,
Make sure under the Camera Calibration tab that the Process is set to 2012.

Tone Curve RGB does not show up

I am using Windows 64 bit and there is no RGB choice on the tone curve.

Have to be in point curve mode and have to be in PV2012.

Tone curve RGB histogram visibility

Hi all.
I installed lightroom 4 Beta this afternoon and quite liked the addition of the individual RGB colours adjustable in the improved Tone Curve interface (Develope module), but feel the actual histogram colours of Red, Green and Blue are barely visible. Can you guys at Adobe improve this please?
Thanks,
Kevin.

I'd like to add that this is the Mac version, but I doubt it really matters :-)

Missing Basic and Tone Curve Panel in LR5

Last night I installed LR5 (last version was LR3) on my iMac with Mavericks OS and everything was working fine, I thought, and I was using the Develop Module when I noticed the Basic Panel and Tone Curve Panel (which I had been using) had gone missing . As in, poof, they were gone. So now I have the Histogram, the Crop and other tools and brushes, and then nothing until HSL/Color/B&W and then on down.

I'm cheating here with another question, but I think it will be quick: I see LR5 automatically uses the updated interface for Highlights, Shadows, Blacks, Whites and I see they are more precise and subtle. Can I go to photos adjusted in LR3 that still show the LR3 interface and use the LR5 interface & finer adjustments on the old photos?

New RGB Tone Curve also a Basic Levels Adjustment?

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