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Evaluate selective text restoration

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Victor Kuznetsov
2026-08-15 12:20:25 -07:00
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@@ -949,6 +949,34 @@ orchestration, YuNet integration, SAM selection, masks, sizing helpers, and pixe
compositing are implemented for this runtime. Changing a calibrated model input
requires the same provider-oracle and identity evaluation as a model change.
A matched stage-isolation check on the 18-face Gemini portrait grid confirms the
division of responsibility. The visible-cleaned, metadata-stripped control and the
Z-Image face-only output were both SynthID-positive; Qwen global-only and the full
Qwen-then-Z-Image output were both clean. The face stage raised identity cosine from
0.589 to 0.852 and reduced face LPIPS from 0.217 to 0.050 without reintroducing a
detectable whole-image signal. Thus Z-Image is a masked fidelity repair stage here,
not the watermark-removal stage. Exact hashes, metrics, strengths, and the one-fixture,
one-seed caveat are recorded in
[`data/evaluations/fidelity/face-stage-isolation-2026-08-13.csv`](../data/evaluations/fidelity/face-stage-isolation-2026-08-13.csv).
The public Synthid-Bypass v2 graph was subsequently audited at upstream commit
`3007d035`. Its saved-output path confirms the same division: Qwen-Image-2512
Lightning plus Canny is global, and Z-Image Turbo exists only inside the masked
face detailer. The connected face path is YOLOv8-face plus SAM; the MediaPipe nodes
described by the upstream README and the 1.2-megapixel normalization node do not
reach `SaveImage`. Upstream also applies its adaptive face strength directly,
whereas this implementation multiplies it by `FACE_DENOISE_SCALE = 0.5`.
A close reproduction on the same portrait fixture kept the control positive and
made both Qwen global-only and full Qwen-then-Z-Image outputs clean. Applying the
upstream-strength face pass raised identity from 0.589 to 0.783 and reduced face
LPIPS from 0.217 to 0.083, but remained worse than this profile's 0.852 and 0.050.
The published upstream pair 12 was also independently checked positive before and
clean after, with 0.975 identity. Exact workflow provenance, hashes, metrics,
oracle outcomes, and the DiffSynth/GGUF, scheduler, detector, and seed caveats are
recorded in
[`data/evaluations/fidelity/upstream-v2-reproduction-2026-08-13.csv`](../data/evaluations/fidelity/upstream-v2-reproduction-2026-08-13.csv).
### SDXL plus Z-Image
[`_internal/sdxl_zimage_pipeline.py`](../src/remove_ai_watermarks/_internal/sdxl_zimage_pipeline.py)