Create and save LUT with Gimp/G'MIC?

[waterprism]

GIMP Version: 2.10.6
Operating System: Windows
OS Version: Windows 10 Pro
GIMP Experience: New User

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Hi. Is it possible with Gimp and/or G'MIC to create a LUT from a single image and then save that LUT in a format such as .cube or similar that can be used in a video editing software like Filmora? I see several LUT/CLUT filters in G'MIC but haven't really been able to see a way to draw out a LUT from an image and then save that LUT in a format that can be used elsewhere. Is there any way to do that? Thanks.

[rich2005]

Hi. Is it possible with Gimp and/or G'MIC to create a LUT from a single image and then save that LUT in a format such as .cube or similar that can be used in a video editing software like Filmora?...

Short answer, I do not think so.

You would be better off asking at https://discuss.pixls.us/ where David Tschumperle resides these days.

A single image is a problem. Gmic_gimp can make a LUT - just a png file - but requires 2 layers. Maybe something like this: https://i.imgur.com/W7VmdCz.jpg

Nothing I can see that will make a .cube file from the LUT (png) in Gimp or gmic.

There are utilities to do this. https://generator.iwltbap.com Just had a look there, I have not used for some time and there is a new version. A PITA to download, does work, I run it in linux using WINE and it does make the .cube ( a big text file ) from the png.

Applied in Gimp & gmic looks like this, https://i.imgur.com/8sLld97.jpg which I think reflects that black background layer.

Use the .cube in video editing? - try and see. The only video editing I do these days is a little chop-and-join.

Again try https://discuss.pixls.us some video interest there.

[neurolurker]

rich2005, perhaps I've misunderstood something about using a "single image" but one can create a haldCLUT from a single image with the G'MIC "Transfer Colors [patch based]" function. You can also use the active layer from a multi-layer image.

I don't know where "Transfer Colors ..." is found in the regular G'MIC menus as I have it under "faves" but it should show up with just a keyword search.

I purchased a program over a year ago, about $50 if memory serves, which can make a CUBE file output from a single image as well as haldCLUTs. It's called "Image2LUT" by Picture Instruments. I started using GIMP a few weeks later and I2L gathered dust in the interim since I had no interest in CUBE outputs, and G'MIC's "Transfer Colors" is a lot more straightforward.

As I said, I may have misunderstood something vital about the question and answer.

[waterprism]

Okay. Thanks, rich2005 and neurolurker. I'll check out the stuff you mentioned. neurolurker, yeah, it's under the 'Colors' dropdown. It does create a CLUT but no real way I can see to save it as a LUT that can be used elsewhere. Thanks.

[waterprism]

rich2005, thanks. I think the iwltbap utility might be helpful to me. Thanks.