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Add the oracle-measured Google strength floor to qwen-zimage

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The resolution curve's 0.154 top left the 4.33 MP CJK-sign fixture
SynthID-detected x3 in Gemini on the full production path (visible
stage -> qwen-zimage seed 0 -> resize-back -> metadata strip), with a
valid pixel-identical stripped control in the same session
(2026-08-18). Google-provenance content now resolves to the flat
QWEN_ZIMAGE_GOOGLE_STRENGTH 0.30 floor instead of the area curve -
anchors at 0.30 measured clean in Gemini on two fixtures (CJK sign +
18-face) at 3/3 checks across two work accounts, and stayed clean
under the vae-glyphs donor layer. openai/unknown content keeps the
curve; an explicit strength still wins.
This commit is contained in:
Victor Kuznetsov
2026-08-18 22:34:41 -07:00
parent 2298282b8b
commit 3cd1e47935
8 changed files with 56 additions and 15 deletions
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tests/test_platform.py
+10 -4
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@@ -14,6 +14,7 @@ import pytest
from remove_ai_watermarks._internal.utils import get_image_format, is_supported_format
from remove_ai_watermarks._internal.watermark_profiles import (
PROFILE_CHOICES,
QWEN_ZIMAGE_GOOGLE_STRENGTH,
REMOVAL_MODULES,
SDXL_ZIMAGE_GEMINI_STRENGTH,
SDXL_ZIMAGE_OPENAI_STRENGTH,
@@ -204,16 +205,21 @@ class TestResolveStrength:
qwen-zimage picks strength from image area, so it takes the size. Returning
None for it would push that branch onto every caller and leave one of the two
strength policies living outside this module. The vendor is ignored here on
purpose - the curve, not the issuer, is what was calibrated.
strength policies living outside this module. Google content is the one
measured exception since 0.27.2: it takes the flat oracle-measured floor
instead of the curve (the curve's 0.154 top left a 4.33 MP fixture
oracle-detected on the full production path).
"""
assert resolve_strength(None, "google", "qwen-zimage", size=(2000, 1850)) == pytest.approx(0.154)
assert resolve_strength(None, "openai", "qwen-zimage", size=(2000, 1850)) == pytest.approx(0.154)
assert resolve_strength(None, None, "qwen-zimage", size=(600, 500)) == pytest.approx(0.084)
assert resolve_strength(None, "google", "qwen-zimage", size=(600, 500)) == QWEN_ZIMAGE_GOOGLE_STRENGTH
# The floor holds at every size, not only above the curve's top rung.
assert resolve_strength(None, "google", "qwen-zimage", size=(2000, 1850)) == QWEN_ZIMAGE_GOOGLE_STRENGTH
def test_qwen_zimage_without_a_size_fails_loudly(self):
"""A missing size must not silently fall back to some vendor value."""
with pytest.raises(ValueError, match="size is required"):
resolve_strength(None, "google", "qwen-zimage")
resolve_strength(None, "openai", "qwen-zimage")
def test_sdxl_zimage_uses_its_flat_vendor_ladder(self):