this post was submitted on 29 Dec 2025
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By layers I mean image layers when manipulating an image in an image editor. So I guess what you're saying is an image would be flattened before being passed to a compression algorithm?
Yeah, if I'm making something "masked/obscured" I should export it so that it's in a raw format. That way there is no Metadata or information that could be leaked by accident.
Think of the Trump Epstein files, in those they kept them as pdfs so you could just unhighlight the redacted sections. If they had export it as a jpeg/png you wouldn't be able to extract any information.
There are ways to remove the content from a pdf, but as we've seen, that leaves rooms for errors.