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42 lines
1.8 KiB
Markdown
42 lines
1.8 KiB
Markdown
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# **Creating Transparent Regions for Inpainting**
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Inpainting is really cool. To do it, you start with an initial image
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and use a photoeditor to make one or more regions transparent
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(i.e. they have a "hole" in them). You then provide the path to this
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image at the dream> command line using the `-I` switch. Stable
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Diffusion will only paint within the transparent region.
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There's a catch. In the current implementation, you have to prepare
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the initial image correctly so that the underlying colors are
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preserved under the transparent area. Many imaging editing
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applications will by default erase the color information under the
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transparent pixels and replace them with white or black, which will
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lead to suboptimal inpainting. You also must take care to export the
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PNG file in such a way that the color information is preserved.
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If your photoeditor is erasing the underlying color information,
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`dream.py` will give you a big fat warning. If you can't find a way to
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coax your photoeditor to retain color values under transparent areas,
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then you can combine the `-I` and `-M` switches to provide both the
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original unedited image and the masked (partially transparent) image:
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```
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dream> man with cat on shoulder -I./images/man.png -M./images/man-transparent.png
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```
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We are hoping to get rid of the need for this workaround in an upcoming release.
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## Recipe for GIMP
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[GIMP](https://www.gimp.org/) is a popular Linux photoediting tool.
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1. Open image in GIMP.
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2. Layer->Transparency->Add Alpha Channel
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3. Use lasoo tool to select region to mask
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4. Choose Select -> Float to create a floating selection
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5. Open the Layers toolbar (^L) and select "Floating Selection"
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6. Set opacity to 0%
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7. Export as PNG
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8. In the export dialogue, Make sure the "Save colour values from
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transparent pixels" checkbox is selected.
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