Victor KuznetsovandClaude Opus 4.8 a4c901ff39 fix: metadata-strip parity, input robustness, and detection/clash coverage ...

Bug fixes (each with a regression test):
- metadata strip parity across every marker placement: IPTC digitalSourceType
  in XMP, the Samsung post-EOI trailer, the China TC260 AIGC block in EXIF
  UserComment, a bare AIGC block in a non-standard APP segment, and the ISOBMFF
  EXIF path (AIGC + xAI) are all now stripped -- anything a scanner flags, the
  strip reaches
- Samsung genAIType detected when its trailer sits past the 512 KB scan window
  (file-tail read on large photos)
- crashes on edge inputs: Gemini detector on images with a short side < 16px,
  footprint_mask on a zero-size ndarray, the humanizer on chromatic_shift >=
  width, and the CLI on unreadable/corrupt/empty input (clean error, not a
  traceback)
- WebP written losslessly (cv2 quality 101), not lossy at 100
- the IPTC digitalSourceType algorithmicMedia (procedural, not trained on
  sampled data) is no longer flagged as AI-generated, so clean procedural
  content is not scrubbed
- c2pa source-type: compositeWithTrainedAlgorithmicMedia is checked before the
  bare algorithmicMedia token, so an AI-enhanced composite is not misclassified

Detection:
- integrity-clash coverage now normalizes ByteDance / Canva / ElevenLabs /
  Black Forest Labs, so a transplanted manifest next to an independent
  conflicting stamp is caught; the generic China TC260 AIGC label is attributed
  to a co-present TC260 vendor, so a legit Doubao image (its own C2PA + TC260
  label) does not clash (corpus-validated: 0 new clashes on 5000 carriers)

CLI:
- batch exits non-zero (with a warning) when any image errors or a GPU-missing
  SynthID scrub is skipped, and copies the input through so the output dir stays
  complete -- it used to always exit 0 and could silently drop files

Perf:
- GeminiEngine reused as a process-wide singleton with a precomputed template
  ladder: -24% on the identify sparkle path, detection byte-identical

Internal: one shared _ai_exif_targets rule set feeds both EXIF scrubbers so
their coverage cannot drift; docs synced; maintain.sh hardened so the uv-secure
internal teardown crash no longer aborts the gate (still fails on a real finding).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

2026-07-13 10:49:24 +03:00

..

__init__.pyi

fix: metadata-strip parity, input robustness, and detection/clash coverage

2026-07-13 10:49:24 +03:00