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fix(invisible): raise default strength 0.10 -> 0.30 (current SynthID threshold); flag ctrlregen experimental

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An oracle-verified GPU strength study (Modal A100, native res, Gemini-app
'Verify with SynthID', n=3 fresh Gemini images, protect_text/faces off) found the
current Google SynthID survives strength 0.10/0.15/0.2 and is removed only at 0.3.
The previous 0.10 default (set from an n=1 result) no longer clears it -- Google
hardened SynthID and the threshold has climbed 0.05 -> 0.10 -> ~0.3. Bump
DEFAULT_STRENGTH to 0.30; OpenAI/ChatGPT carry C2PA not SynthID, so 0.10 is plenty
there (pass --strength 0.10). Note protect_text shields the text regions SynthID
hides in (use --no-protect-text for full removal on text-heavy images).

The same study found ctrlregen at clean-noise strength DESTROYS real images
(hallucinated micro-text in smooth regions), with no usable middle setting, so the
literature's 'clean-noise is the lever' did not hold empirically. Flag ctrlregen
EXPERIMENTAL in the CLI --pipeline help, README, and watermark_profiles; SDXL
img2img at ~0.3 stays the shippable path.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Victor Kuznetsov
2026-05-31 16:38:49 -07:00
co-authored by Claude Opus 4.8
parent 729f5f2ecd
commit cddbaf6413
6 changed files with 50 additions and 31 deletions
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src/remove_ai_watermarks/cli.py
+5 -5
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@@ -433,14 +433,14 @@ def cmd_erase(
"--strength",
type=float,
default=None,
help="Denoising strength (0.0-1.0). Default: 0.10 (SDXL), 1.0 clean-noise for ctrlregen.",
help="Denoising strength (0.0-1.0). Default: 0.30 (SDXL SynthID threshold); ctrlregen uses 1.0.",
)
@click.option("--steps", type=int, default=50, help="Number of denoising steps. Default: 50.")
@click.option(
"--pipeline",
type=click.Choice(["default", "ctrlregen"]),
default="default",
help="Pipeline profile (default=SDXL, ctrlregen=CtrlRegen).",
help="Pipeline profile (default=SDXL; ctrlregen=CtrlRegen, EXPERIMENTAL/destructive at clean-noise).",
)
@click.option(
"--device",
@@ -680,14 +680,14 @@ def cmd_identify(ctx: click.Context, source: Path, no_visible: bool, as_json: bo
"--strength",
type=float,
default=None,
help="Invisible watermark denoising strength. Default: 0.10 (SDXL), 1.0 clean-noise for ctrlregen.",
help="Invisible watermark denoising strength. Default: 0.30 (SDXL); ctrlregen uses 1.0.",
)
@click.option("--steps", type=int, default=50, help="Number of denoising steps for invisible removal.")
@click.option(
"--pipeline",
type=click.Choice(["default", "ctrlregen"]),
default="default",
help="Pipeline profile (default=SDXL, ctrlregen=CtrlRegen).",
help="Pipeline profile (default=SDXL; ctrlregen=CtrlRegen, EXPERIMENTAL/destructive at clean-noise).",
)
@click.option("--model", type=str, default=None, help="HuggingFace model ID for invisible removal.")
@click.option(
@@ -979,7 +979,7 @@ def _process_batch_image(
"--pipeline",
type=click.Choice(["default", "ctrlregen"]),
default="default",
help="Pipeline profile (default=SDXL, ctrlregen=CtrlRegen).",
help="Pipeline profile (default=SDXL; ctrlregen=CtrlRegen, EXPERIMENTAL/destructive at clean-noise).",
)
@click.option(
"--device",