img2img greyscale colorization.

[Buckzor]

I think it would be incredibly useful to have an option to treat an input image as greyscale to allow img2img to change colours based on noise. In other words, only use the value of image pixels for the noise, and randomize hue and saturation to enable the re-colouring of images.

[cmp-nct]

I've seen img2img projects which included exactly that, but can't recall the repository.
Btw it is not just grayscale, the ability to change colors is not that good in img2img methods available here atm.
Try make a blue sky red, almost impossible without manually masking it which comes with more issues.

[horribleCodes]

It won't work for grayscale, but you could make a quick coloring tool for lineart drawings by modifying the loopback + superimpose script. If you were to superimpose the original BW image with blending mode multiply, you'd keep the crisp lines.

[Buckzor]

It won't work for grayscale, but you could make a quick coloring tool for lineart drawings by modifying the loopback + superimpose script. If you were to superimpose the original BW image with blending mode multiply, you'd keep the crisp lines.

There is this implementation, however, it is way above my knowledge to understand and implement:
https://github.com/satoshiiizuka/siggraph2016_colorization

[78Alpha]

Style2Paints is a good square line art coloring tool. Might be able to stick it in somewhere, but not easily (very old tensor flow)

[sabi3293043]

ya I tried colorizing one of my sketches it was kind of working I specified the colors each part had and it was doing it but the token limit was hindering me from fully doing it you just have to have a low denoising strength

[horribleCodes]

Have you tried crudely blocking in the colors first? You could focus on specifying the style and lighting instead.

[iktomi-sakala]

I have quite a similar issue with SD and Deforum : I'm working on a music-track sync SD animation, black & white, intersped with black and red parts, and it's stuck in B&W. No matter what I try ("black&white" / "desaturated" / "--neg colored"), no matter the position in the prompt, wheighting changes nothing...
And it's the same with any color palette. If I start in pale blue, it will remain pale and mainly blue, even in the red parts, which are way larger than the interpolation zones...