Most AI image generators that generate images add EXIF metadata indicating that the image is AI-generated. This helps people who want to identify AI-generated images readily.
In the case of ComfyUI, it even includes the entire workflow
like, another ComfyUI user can just grab the image, drop it onto their ComfyUI Web UI and they'll be right where the generating user was.
Unfortunately, EXIF metadata can contain location information
some cameras and such add it
and this metadata led to people posting images at places like Reddit being doxxed after they didn't realize that they were posting their GPS location and maybe real name, stuff that some cameras attach. As a result, a number of image-hosting places simply strip all metadata, to prevent users from from accidentally leaking this information.
Pict-rs, the software package that Lemmy hosts run to permit image uploads, does this. Unfortunately, it means that those "this is an AI-generated image" tags get stripped off.
So, for example, on my system, with ComfyUI, using ImageMagick:
$ identify -verbose output/ComfyUI_00312_.png
"Properties:prompt" has a JSON encoding of the workflow.
Sample images generated by various AI image generators are readily-available on civitai.com.
For this generator that generated this image on civitai, it looks like the parameter is "Properties:parameters".
I believe that there are a small number of such tags today.
It would be technically possible to just not have pict-rs strip that particular tag (or tags, if there are multiple that a given generator adds?) off, have a list of "AI-generated tags", then have Lemmy add some visual indicator that an image is AI-generated. I'd suggest that this is probably a better longer-term route to indicate that an image is AI-generated than manually-tagging post titles, for a couple of reasons:
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Spiders that index images on the Web will know that the image is AI-generated and can flag that for users and let them use that as a filtering criteria (e.g. Kagi Images permits for this). They aren't going to understand tags in post titles, but the metadata tags are somewhat universal.
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Doesn't require manual effort if an image can have some indicator or flair or whatever put on it automatically. And I guarantee that some users are going to get this wrong just by accident, because different instances have different rules. Easier to change how a computer works than to change human behavior across-the-board.
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Works on all instances.
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The information remains attached to the image even if downloaded.
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Works for images that aren't just the subject of single-image posts and don't have an associated title.
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Speaking purely for myself, I kind of like the open-source, collaborative aspect of sharing the workflows or prompts, since it helps other users see how an image was created and learn from it; it's something that I'm glad to see the generators include, and I'm kind of sad that we strip it off on the Threadiverse.
There are ISO country codes.
https://en.wikipedia.org/wiki/List_of_ISO_3166_country_codes