To commemorate the new blog, I wanted to have a cool logo up in the corner. Since one of my current interests is generative AI, I thought I'd try using it to generate myself a logo. This post explains the process.
Getting Started
I already have the kit set up to run a large language model (LLM) in my home network. However, I've only ever used it for text generation before; I had no idea how to make it generate images.
I started with Koboldcpp, since I recalled that it was able to generate images as of a recent release. This wiki page explained how to generate images with Koboldcpp, and provided some example models to try. I poked at a couple of different ones before I tried the Anything v3 model linked from that page. I ran the model with --sdmodel <path-to-anything>.
I admit, it took me a while to figure out how to even start trying to generate an image! I had to poke around in the text generation UI ("kobold lite") for a while before I realized that the image generation UI was an entirely different path: <IP>:5001/sdui.
Prompting the Model
Once I had that running, I had to figure out how to actually prompt the model and get images out. A useful technique I ran across is to use an empty white square with the img2img option to force the model to generate something that's mostly white, which is what I wanted for my logo. (I used the convert command to generate said image.)
I wound up with:
The settings I used were:
- Prompt:
sparse black line drawing vector logo icon, stylized male human head filled with gears and circuits, profile, no text, no fill, line art, adobe illustrator, vector art - Negative prompt:
color, blurry, complex, intricate, neon, mecha, robotech, spiky, anime - Sampler:
Euler a - Steps: 40
- Guidance: 15
Takeaways
This took a lot of work! Both to get the image generation pipeline working in the first place, and also to tweak the parameters and try to get to an image I liked. Even this one isn't exactly where I'd want it, but I think it's about as good as it's going to get for my current level of setting-up-the-pipeline and prompting skills, so I'm setting it down for now. I did appreciate the ability to translate the rough image I had in mind to something tangible; I have no drawing talent whatsoever so it was nice to have borrowed access to this skill.
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