A few options:
- Deoldify
- works pretty well
- no options for configuration really though
- latentcat/control_v1p_sd15_brightness in controlnet
- more tweakability
- txt2image, no prompt
- some samplers I've played with
- Euler a
- DPM++ SDE
- DPM++ 2s a
- DPM++ 2M SDE
- DPM++ 2M
- a variety of checkpoints seem to work
- sampling steps ~ 6
- CFG scale ~ 2
- Pixel perfect
- preprocessor: none
- model: control_v1p_sd15_brightness
- control mode: balanced
- control weight: 1
- starting control step: 0
- ending control step: 1