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Output stays bit-identical: decoder bits and detector verdicts recorded over 200 sampled data/ images plus two synthesized carriers before and after, and the record is byte-identical. Measured on a 1536x2816 image -- decoder 0.280s to 0.016s, warm identify() 1.757s to 1.365s with both arms timed in one process. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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Markdown
22 lines
1.0 KiB
Markdown
# Code provenance
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This page records notices required by source dependencies and licensed derivative work.
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## Licensed derivative work
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- The DWT-DCT implementation derives from ShieldMnt's
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[`invisible-watermark`](https://github.com/ShieldMnt/invisible-watermark), licensed
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under MIT. Its notice ships in `src/remove_ai_watermarks/licenses/invisible-watermark-MIT.txt`.
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The decode path is a vectorized reformulation, not a transcription: it produces
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the same bits and is checked against upstream's own decoder, but it no longer
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corresponds line by line to `imwatermark/maxDct.py`. Diffing the two files will
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show structurally different code, which is expected and does not mean the
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derivation notice is stale.
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## Licensed test fixtures
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- `data/fixtures/provenance/adobe-trustmark-p.png` is Adobe's official
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TrustMark Variant P example, licensed under MIT. Its source commit, digest,
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and reproduced license are recorded beside the fixture in
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`data/fixtures/README.md` and `data/licenses/adobe-trustmark-MIT.txt`.
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