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Guide text-heavy content away from forced diffusion scrubs

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Issue #84: text, tables, and UI screenshots are the worst case for
--force regeneration. Document that the default pipeline skips the
invisible stage without a detectable signal, that visible/metadata
stages never redraw glyphs, and why paste-back is not offered.
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Victor Kuznetsov
2026-08-18 11:03:53 -07:00
parent 2e1428406e
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@@ -57,6 +57,19 @@ Invisible removal does not decode and delete a payload. It regenerates the
image through a diffusion pipeline. Faces, text, colors, and fine detail can image through a diffusion pipeline. Faces, text, colors, and fine detail can
change even when the watermark is successfully disrupted. change even when the watermark is successfully disrupted.
Text, tables, and UI screenshots are the worst case for a forced scrub: the
model redraws glyphs as plausible-but-wrong shapes. Do not run the invisible
stage on such content unless a locally-detectable invisible signal exists.
The default `all`, `invisible`, and `batch` commands already skip it then, and
`visible` (which strips AI metadata by default) or `metadata` alone never
redraws a glyph outside the filled watermark box. `--force` is for content you
know carries a pixel watermark despite no local signal; on a clean screenshot
it only buys distortion. Preserving or pasting back the original text pixels
during a real scrub is deliberately not offered: an invisible watermark such
as SynthID lives in the pixels everywhere, including inside the glyphs, so
frozen text regions would keep the watermark
([text protection research](text-protection-research.md)).
`qwen-zimage` is the default profile and `sdxl-zimage` the only alternative. `qwen-zimage` is the default profile and `sdxl-zimage` the only alternative.
Both are CUDA only and differ only in the global regeneration model: each Both are CUDA only and differ only in the global regeneration model: each
conditions that stage on a canny edge map, which preserves structure but not conditions that stage on a canny edge map, which preserves structure but not