Sharpening, WYSIWYG, with a small output image

Software darktable
1

So I have done some work on my full sized raw file, now I want to export a reduced size 1,000px image for social media. And I want to sharpen this small image in a WYSIWYG way so I can see the effect of my sharpening and can adjust it to suit.

How do I do that?

2

You cannot. Resizing for export is done after the pipeline runs.
You can install lua-scripts/contrib/RL_out_sharp.lua at master · darktable-org/lua-scripts · GitHub (see lua-scripts/README.md at master · darktable-org/lua-scripts · GitHub) to automatically sharpen after resizing, but that won’t be WYSIWYG, either.

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3

Is this something where I have to get GIMP to catch the created 1,000px image and sharpen there?

4

Yes.

See: lua-scripts/contrib/gimp.lua at master · darktable-org/lua-scripts · GitHub
and lua-scripts/contrib/ext_editor.lua at master · darktable-org/lua-scripts · GitHub

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5

Thanks Kofa, I will have a play with doing it that way. I think I will export top quality jpegs to GIMP - because I don’t wand loads of massive TIFFs on my hard drive.

6

You can delete the TIFFs afterwards, can’t you? Maybe those LUA scripts even do that – I don’t use them and don’t know.

1 Like
7

I like 95% jpegs and once I am comfortable with my new darktable / GIMP workflow I will probably overwrite them with 80% sharpened jpegs anyhow so there shouldn’t be files to delete. Anyhow, pleased I have found a way forward. It isn’t nice to be told your images are soft, but it caused me to examine what I am doing, and I think the result is better.

1 Like