什么是 outpainting？
outpainting 是 扩画图像“外侧” 的手法。
从内容上来说，和 inpainting 的 “类型 B: 一边看周围的信息，一边自然地填补掩膜部分” 完全一样。
区别仅在于掩膜是在图像里面，还是在外面。
以前提是先读了 inpainting 来推进。
inpainting 模型
使用了 inpainting 模型的，老实做法。
工作流
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- 和 [inpainting/inpainting 模型](/zh/basic-workflows/sd15-inpainting/#inpainting 模型) 几乎一样。
- 🟦 在
Pad Image for Outpainting节点，向外侧扩展图像。- 扩展的部分作为掩膜输出。
- 🟩 剩下的只要连接到
InpaintModelConditioning节点就行。
ControlNet inpaint
如果想原样使用喜欢的模型，就使用 ControlNet inpaint。
工作流
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- 基本构成和 inpainting/ControlNet inpaint 一样。
- 🟦 在
Pad Image for Outpainting节点，向外侧扩展图像。- 这个也是，扩展的部分变成掩膜。
- 🟨 将 outpainting 后的图像和掩膜，传递给 ControlNet inpaint 用的预处理节点。