lllyasviel / lllyasviel/LayerDiffuse

Using resize fix, with low denoise levels, a transparent chequered BG is visible under transparency

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Description

Hello there,
when I use resize fix, if I keep denoise level under 0.5, the chequered background is slightly visible on the transparent resized image.
I.e.
1 - Create the image 1024x1024 - all fine, checkuered example image and white BG image are created
2 - Once resize fix is applied, if denoise is under 0.5, chequered BG is visible on the transparent resized image, albeit confused
If denoise is 0.7 works well.

1024x1024
![image](https://github.com/layerdiffusion/LayerDiffuse/assets/29799572/1564b263-2cd6-4d72-b0ad-bdf52e4b9548)
1024x1024 transparent
![image](https://github.com/layerdiffusion/LayerDiffuse/assets/29799572/4a28f020-6b53-4add-953d-abd4a588cc41)
2048x2048 - chequered BG is visible although foggy
![image](https://github.com/layerdiffusion/LayerDiffuse/assets/29799572/cf953768-c306-431d-aa30-7001c261ff99)
![image](https://github.com/layerdiffusion/LayerDiffuse/assets/29799572/f9494105-50ec-4a59-a30b-a282bed1eb81)

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the reported resize-fix workflow at 1024x1024 and 2048x2048, comparing denoise levels below 0.5 with 0.7. The issue names no files, tests, or entry points, so trace the resize-fix path from that reproduction. Done means the transparent resized image no longer shows a visible checkerboard background at low denoise levels.

Written by the indexing model from the issue text.

Assessment

Domain
computer-vision, machine-learning
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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