Modes
| Mode | Signal | Survives |
|---|---|---|
alpha | sparse alpha pixels | — (killed by PNG→JPEG / strip) |
dct | 8×8 DCT coefficient offset | PNG→JPEG q≥50 |
dwt | Haar LH sub-band bias | scale, moderate blur |
learned | TrustMark (ONNX) | JPEG q30, blur σ2, scale 0.5× |
Install
# Homebrew
brew tap xuepoo/tap && brew install sigil
# Scoop
scoop bucket add xuepoo https://github.com/Xuepoo/scoop-bucket && scoop install sigil
# Arch (AUR)
yay -S sigil-wm-bin