Color Hue Diversification/Separation (The opposite of uniformity - for landscape, travel, food...)
Sometimes I want to subtly enhance / emphasize the richness of an image's color palette, or part thereof.
For example, take the rich palette of subtle tones like blues, greens, yellows, browns in the woods.
Instead of only emphasizing individual colors or boosting overall saturation I want to separate the colors so that subtle differences are enhanced, differences are "spread out". This is the opposite of uniformity (or negative uniformity).
I think it could be an enhancement to the Skin Tone Editor. The uniformity slider for hue is meant to bring separate tones closer together to de-emphasize unpleasant or patchy skin. This works great, not only for skin tones, not only for portraiture. Now the request is for the opposite, to increase the differences.
For example in the woody part of the image I want the yellow-greens a little bit yellower, and the blue-greens a little bit more bluish, and a certain green which I pick via the picker should stay as it is. The opposite of the hue uniformity slider.
I can somehow achieve this in the Advanced Color Editor with two hue shifts, but (1) it is more work and (2) and foremost, my own "color stretching" is certainly not as smooth and consistent as if this would be implement by C1s color scientists/artists in one tool, e.g. as negative uniformity in the skin tone editor.
Here is how the Skin Tone Editor works with Hue Uniformity (as of today):
Here is what the Skin Tone Editor could be doing in the future with Negative Hue Uniformity (or a special Color Diversification tool with positive numbers, respectively):
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Btw, for those of you who are curious, here's a sketch how the Skin Tone Editor works with Saturation Uniformity. The picked color (dot) is the reference point and defines the target line for the saturation uniformity for the selected color range.
(This illustration is how I explain it to myself, no guarantee it is 100% correct :-)
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I have seen DXO Photolab has a uniformity slider allowing to set negative values.
C1, if you implement this in the Skin Tone Editor you will be ahead of DXO for this feature because I think the Skin Tone Editor is better/has more options.
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Hi, BeO. Have you asked about this before? It sounds a bit familiar. If it wasn't you, you might like to search the forum and see who else asked about the same thing a while back, and see what was said then.
Ian
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Hey Ian, very good. It's a copy from my request from August, it was ignored by C1, it had two votes and no comments. I thought maybe C1 is not looking back to older posts so I pasted it as a new one and deleted the old.
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Unfortunately the images are gone...?
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Yes, I wondered what had happened to them. If you still have them on your computer, you could edit the post and reinsert them, perhaps?
Ian
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I've redone some sketches.
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Given the relatively subtle amount of adjustment provided with the Skin Tone tool might it be advantageous to suggest that negative uniformity might be a good adjustment to apply as a slider in the Advanced adjustments section? Or even the basic colour editor?
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Thinking about that idea some more ...
Absent the idea of creating colours (that do not currently exist in the image as interpreted at the pixel level), does the availability of a negative uniformity imply that some degree of uniformity processing must have been applied to the image already?
At the most detailed level of a RAW file and the baseline of RAW conversion, would it require re-interpretation of the RAW data using different criteria?
For processed jpgs that have already been subjected to pixel binning there might be an opportunity to somehow "spread" homogenized pixels in compressed areas but for RAW files using 100% of the RAW pixels available what sort of approach should be adopted?
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Hi SFA, it is not about creating colors which don't exist, it is about emphazising existing differences. This can be done in the Lab color space by steepening the a and b components of each pixel, as shown here:
from "Photoshop Lab Color-The Canyon Conundrum and other Adventures in the most powerful colorspace (Dan Margulis).
This works very well to spread out subtle differences at least for subdued, low-saturated colors.
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bump
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Nagtive uniformity would be good, also as Sat/Sat curve, Sat mask, and AB curves from LAB.
It's very usefull to have Hue diversification and ability to work seperatly with high and low saturated colors.
This will give C1 capabilities which no one converter has.
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Is there an issue with the forum so that C1 staff does not see all posts in the topic Feature Requests?
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They do look at the feature requests forum, I believe. But you may not see fast responses to requests.
Ian
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No more votes?
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What a great feature this would be...
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Thank you for your well-described feature request.
A few questions:
- While Clarity in Punch mode is not exactly what you are looking for, it does emphasise colors and separate them more by adding contrast. Can I have you put some words on how you see the difference between your request and the above mentioned tool?
- Can you post some raw-files, with a reference use case for each, showing how you would like to use the requested functionality?
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