Display of Coordinates in Tone Curve

Finest movement is 1/255, which can be attained by pressing an arrow key…once the request has been implemented.

Oh…kay? Didn’t thought about it :grinning:

I would still like to see a larger area to allow for finer control and, thus, more complex curves

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YES, also see → here …


to add

  • FilmPack has these coordinates
  • and Nik SEP3 ( → Film types → Level & Curves ) the underlaying histogram

Hello,
I think that’s pretty much what I wanted to achieve. And I don’t really care how it is solved. At the moment, I can make the settings relatively roughly with the touchpad, for example. With the button/mouse combo, I would then simply have a kind of scaling factor, with a larger surface the identical distance of movement would simply be less value added.
I can’t describe this properly, and I think we’ve had this issue with other tools/sliders where you have difficulty realising values around the +/- 1 change.
But I’ve no access to the EA5 posts where we discussed it.
Another solution would be to implement a radio button to set a scaling factor of lets say 0.1 or 0.5 For the reduction in value for the same route.

Here’s an example of how to use a tone curve that has the features I request:

The is edited to match the 6 greyscale patches of a Color Checker.

  1. add 6 points between the black- and white-points
  2. enter the target output values , e.g. 52/83/122/160/200/220
  3. select a point and the respective patch
  4. increase or decrease the input value (using the keyboard) until the patch has the correct value
  5. repeat steps 3 and 4 for all other patches
  6. done

As we can see, the shot was underexposed. I could have raised exposure, which would have given different in/out pairs in the tonecurve.

Moving the points with a mouse or touchpad does not work well, because the movement often changes both input and output values. That’s why I propose to use the keyboard. If the movement could be limited to one direction, mouse/tablet could be used too.

Curve with initial exposure correction:

Note: TC of Lightroom Classic, which has the annoying feature to display tones in % in the histogram and as 0…255 in the tone curve. In soft proof mode, they come up with 0…255 though. :crazy_face:

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Yes! Agree; also with Joanna, that we need a (tear-off or pop-out) panel that is larger than the current implementation.

Most of all, I want a LAB COLORSPACE for the adjustments: i.e. the ability to change the contrast in luminosity only. Adjusting contrast in RGB, as DPL does changes the hue when it should not.

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I just remembered one function in my old LR 6.14 with the tone curve
image
With choosing the “Punktkurve” you can click on the color to be selected.
This will be set a point at the curve and either you can move the mouse in the picture to change the curve level or click on the set point in the tone curve to change here.
And it works also with the mouse wheel after pointing the color.

It was simple and fast

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It still is in Lightroom Classic. It helps to get things right in no time, based on this:

Colours will still be off the given numbers, but they look pretty close to an original Color Checker Passport reference. Again, “correct” is what we want for repro work, everything else can follow our own ideas and intentions…

CC value for sRGB (D65) in 0…255 and %:
Color Checker Values.pdf (20.8 KB)

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Yes. This histogram is so small especially on a 4K or >4K display.
It needs to be able to switch from the little one we have to a big popup window with all those options :grinning:

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Voted.
It is a really basic UI requirement to have enough “resolution” to be able to make sensitive adjustments to a curve. The current UI is adequate to implement a basic S curve for example but for multipoint adjustments it is inadequate.
Other software simply allows you to resize the UI window to obtain whatever you need, even virtually full screen. I would like DXO to implement their on screen display functionality, as you get with menus for local adjustments to allow the curve line to be displayed full screen to give something similar, but better, than C1which simply uses an enlarged window.


.
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Agreed - very handy tool and great time saver. The PL tone curve offering really needs a good overall updating as well - many good ideas in this section. Gets my vote.

to reiterate → What are the most important improvements for v5? - #201 by Wolfgang

(just replace v5 by v7 … )

This is possible now, Lex.

In my standard default Preset (the one auto-applied to “newly encountered” images) I have a simple Tone-Curve set-up - but, with the Tone Curve tool deactivated.

When I want to use this curve as a starting point, I simple activate the Tone Curve - and, voila !

John M

Two of the most fundamental tools in most editors are the Levels and Curve tools. Photolab’s Curve tool does the job of Levels - black, white and gamma can be easily adjusted. Beyond that, I find it useless. There’s no input - you can’t define an editable point either with on-canvas selection or clicking on the curve. There’s no feedback - no histogram and no coordinates for points on the curve.
Much improvement needed.

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…which is proposed in the initial post on this thread.

Vote, vote, vote!

John, thank you for the hint.

But creating and applying partial presets is a cumbersome way for small individual adjustments.

It is much more convenient to have an option within the Tone Curve panel to directly save or load a preset there, where this preset only relates to the settings of the curve.

For example, look at how that is done in Affinity Photo for saving a preset to Curves. But then again, loading a preset in Affinity is unfortunately cumbersome.

Anyway, I find adjustments of the tone curve in Affinity Photo much nicer than in Photolab.

Lex

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If you like to add handles to the tone curve, you can use (and edit) this:
Part - Tone Curve Handles.preset.zip (813 Bytes)

If you open the file in a text editor, you can easily find how to change the values or add and remove handles. Just make sure they come in pairs.

I have voted. This is one of the most important needed refinements to me.

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A quick comparison with how the old Kodak DCS PhotoDesk worked tone curves would be of benefit to the DxO developers…

In particular I miss being able to overlay the adjustable tone curve with histogram for visual comparison…

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