Look Modification Tools #10
Replies: 3 comments 4 replies
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Hey Anton! Good idea starting a discussion thread, I like it 😄 Been meaning to reply for a while, but have been pretty busy, sorry about the delay.
Yes I have been thinking about making a library for shared code for the look tools also. If the functions for the look tools live in that library also, the look tools themselves could be pretty light. And a "preset" look (a look tool with a fixed set of parameters" could be a DCTL of just a few lines. It could be pretty slick actually, I think it's a good idea. I will implement these changes once I iron out a few more changes and the tools are a bit more stable.
Yes, most of the look tools use a linear extraction of hue. This creates a cusp at the boundaries between the primary and secondary hue angles. Those cusps could easily be smoothstepped though if it is a problem. I could add an optional checkbox pretty easily. I'll do some more testing to see if this would break anything unexpected.
Yes I know. It will push some hues out of gamut. This can be okay if you are dealing with reflected surface colors. The appearance of the shifted hue can be natural sometimes. But sometimes it does not look natural. I was thinking of adding a limit slider or something like this to control how far colors are allowed to be pushed out of gamut. I will experiment with this and see if it works.
I would be curious to see exact settings you are using, test images, and a description of this if you are up for it. Feel free to make an issue and we can talk about it. Thanks for the useful feedback! |
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I really like how I can get a nice starting point LMT with Vibrance tool, especially when applied to darker parts of the image only, but I found chromaticity-linear option very noisy with low saturated objects like18% gray card for example. Is there a way to tweak its behavior with these colors? The first thing that comes to my mind is to gradually exclude low saturated pixels from the effect. But it probably will also exclude a lot of skin tone colors. So probably there is a better way for this. Or probably there is some color model that would work good for selecting saturation for this. |
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Hello Jed. Thank you for your tools! |
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Hi Jed!
Is this ok that I created the discussion here? Not sure what is the best place for this. I've never used github before, so I don't know if the discussions section here is the right place for this or not.
I've checked out your new look tools and they are awesome! Thanks for sharing them! Is there a chance they all will be combined in a one big DCTL? So it would be possible to change defaults in notepad and to use it as a DCTL LMT without loading it into DCTL OFX. It would also be helpful if there will be a switch for changing input primaries between AP0 and AP1, so it could be used as proper LMT.
Also I found one thing with NotoriousSix_Value and if you don't mind, I'd like to inform you about it, just in case. I'm talking about these dark lines.
Also there are sharp transitions between primary colors with NotoriousSix_Vibrance.
They create artifacts with real world footage that has transitions from blue to red colors. This is not specific to NotoriousSix_Vibrance though, I get the same sharp transitions with all the tools for "subtractive" saturation I've ever seen (they are all based on HSV). But since you make all these wonderful tools I thought you probably know how to make it more clean in those transition regions.
And I really like how NotoriousSix_Vibrance and NotoriousSix_Value do not produce any out of gamut colors if the source doesn't have negative values. All the similar tools I've seen Immediately go below 0.
And while I was writing this I checked NotoriousSix_HueShift and found that it produce some values out of 0-1 range.
Also I would like to clarify that your tools are amazing! The only reason why I report so many little things is that I really like them.
And I have one thing I would also like to report about OpenDRT and to demonstrate on a real footage that it doesn't preserve some colors hue (not LEDs and neons, just a red jacket) between different HDR Output Transforms. Where could I do that? And should I at all?
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