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27 lines
1.3 KiB
Markdown
27 lines
1.3 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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- `data/fixtures/provenance/microsoft-paint-invismark.png` is an original
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Microsoft Paint output supplied by Xusheng Li and licensed by him under MIT.
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Its source research, digest, expected signal, and reproduced license are
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recorded in `data/fixtures/README.md` and
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`data/licenses/xusheng-li-paint-invismark-MIT.txt`.
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