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Old 01-22-2026, 06:06 PM   #29
graycyn
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Posts: 1,639
Karma: 11728332
Join Date: Aug 2010
Location: NE Oregon
Device: Kobo Sage, Pocketbook Era, Kindle Oasis 2, Nook Glowlight 4+
Quote:
Originally Posted by Cactus Chef View Post
That seems like way too much to be just watermarks. Maybe different image resolutions/compression algorithms being used?

I'd be happy to contribute to the research effort if we could find a target book that wasn't Rowling...
My first effort at compare was a bust, because I'd forgotten that I'd already assigned tags and such to the Adobe DRM book. So, I imported the Adobe DRM book into Calibre again, then exported to a folder without doing anything, other than letting Calibre remove DRM.

Selected the SDRM book, went to compare, and there seem to be various differences. I'm a little confused, because I'm not sure what I'm doing or even which book is which in the compare panel now, (LOL!), but, there are, from quick observation, uuid differences, image size differences, and differences in the spans for the page-map IDs, in terms of the order the info contained within appears.

So it seems multiple sorts of changes going on. I'll let someone else go for the definitive statement on what might be different and whether it's removeable. Since I've no intentions to share such books with anyone other than my husband, I'm for social DRM if Adobe DRM should bite the dust.

Right panel:
Code:
<span id="page-5" role="doc-pagebreak" epub:type="pagebreak" aria-label=" Page 5. "/>
Left panel:
Code:
<span aria-label=" Page 5. " epub:type="pagebreak" id="page-5" role="doc-pagebreak"/>
There ya go...
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