scraed f564ee886b Add the Qwen-Image 2.1 example with transparent-background inpainting ...

LanPaint runs on Qwen-Image 2.1 unchanged: it is a rectified-flow model, so the
existing Flux/Qwen-Image conversions apply. Example_31 uses a text-to-image render
of its own model as the before/after, generated with a transparent background, and
keeps the inpainting mask in a separate greyscale file rather than in the picture's
alpha - 2.1's alpha channel means transparency, so overloading it would make the
two indistinguishable.

The transparency is carried into the latent and edited along with the pixels: the
2.1 VAE is 4-in/4-out (encoder.conv1 takes 4 channels, the decoder head emits 4),
and LoadImage's MASK output re-attaches through Join Image With Alpha, since that
mask is already 1 - alpha. The rebuilt sole grows past the old outline, so the
alpha in that region is generated rather than copied.

LanPaint_ImageDecode now matches the decoded channels to the source image: the 2.1
VAE always emits a 4th channel, which the merge could not broadcast. It keeps the
input's channel count, so an RGBA source comes back RGBA and an RGB source still
comes back RGB.

2026-09-28 00:25:23 +08:00

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