Roel, I was searching for “black point compensation” as it was referred to in the discussion. That’s why I didn’t find anything.
I can implement it for 5.9. The question is, where to place it in UI. Technically it should be in the raw blackpoints tool. Conceptionally it could be also in the Haze removal tool. I prefer the first.
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i also would prefer it in RAW blackpoints tool. Would it be possible to put an internal link from haze removal tool to there? So the user could choose individually, which way he would prefer …
I think a checkbox for ‘Black point dehaze’ could be added to the Haze removal panel, while in the background the GUI for the Raw black points would be updated.
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Sometimes messing with raw black points can cause undesired color impacts…
I’ve found (when working with earlier versions of the film negative inversion tool, I haven’t retried with more recent versions) that messing with the LAB curve tool (basically have a linear “curve” that started at a nonzero value) worked well.
To provide a screenshot I’ll need to be home (I am not now).
Sure, but also vice versa. Haze can cause undesired color impacts, which then can be corrected by changing raw black points…
Yes but if the checkbox is in Haze removal tool, users will not be tempted to mess with that for other use.
So I Agree with @Thanatomanic
I think that the automatic checkbox must be in the Raw Black Points module to have it separated from the Haze Removal module, because that way I can have the automatic checkbox activated and at the same time have the Haze Removal module deactivated.
You can put strength to 0
Good point. Furthermore I think, changing something in one tool (a new auto checkbox in dehaze), which changes values in a different tool (raw black levels, which is also in a different tab), is very confusing.
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I agree. I think a checkbox in the raw tab would be the most logical thing to do. Maybe have a short information about this function in the mouseover text of the dehaze slider?
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Makes sense for me…
It would be a solution. I understand that it is more practical, but it tries to avoid confusion.
In my opinion playing with the Raw Black Points is good for the image, and even if it has a side effect of removing haze to some degree, it shouldn’t be focused on that. Black Points are a different matter than dehazing.
Improving blacks on any image is usually good, but having a button that automatically removes all the haze in an image is not so good. One of the benefits of the Dehaze tool is that you have control on how much haze you are going to remove. That’s currently not the case with the auto-Black Points: how can I easily improve the black points of the image without removing all the haze? Yes, we’ve had those Black Point sliders all the time at our disposal. But I mean «an easy way».
Perhaps one solution would be adding an auto-calculation check box in the Black Points tool, and adding a Strength slider. That way we could find a nice compromise between having both good blacks and certain level of haze.
Having haze in images is not always a bad thing…
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As this is only valid for raw images, shouldn’t it be located on the Raw tab?
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Using RT Dev with local adjustments (and other functions), this is what I was able to do with it.
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Thanks for that, I used what Ingo did and it looks fine. But it is always good to have another option
Yes, that is part of what I did. I just took it further with additional functons.
@chaimav thanks for that, when I try that .pp3 it goes green for me - maybe because I am using a different version (5.8) of Rawtherappee?
Yes, I am using an unreleased version with local adjustments that won’t be available until version 5.9. You can download a copy from here Release Automated Builds · Beep6581/RawTherapee · GitHub
Note that this is not an official release so you may run across some bugs, but you should have no issues running it alongside 5.8.