Colorize ANY Lineart in SECONDS! | How to Create Lineart and Colorize it with Stable Diffusion
Howto & Style
Introduction
In this article, we will explore a straightforward method for colorizing anime line art using AI. Our goal is to transform uncolored line art into a beautifully colored high-quality image. We’ll take you through the necessary steps to achieve this—so let’s get started!
Step 1: Set Up ControlNet
Before diving into the colorization process, it’s essential to ensure that you have the ControlNet model installed in your Stable Diffusion setup, specifically version 1.1.1. Most users may already have this, so you can skip this part if you're good to go. If you haven't installed it yet, please update your system and download the necessary models and place them within the ControlNet extension.
Additionally, you may opt to download the anime line art manga-like model from Civitai, which is linked in the description below. The "Easy Negative" model is also recommended; this will be beneficial for generating high-quality images without needing extensive prompt engineering. Lastly, if you require better hand representations, consider acquiring the textual inversion for bad hands, which can work as a negative prompt.
Ensure you have the latest update of ControlNet for optimal performance.
Step 2: Generate Line Art
Now, let’s create the line art to work with since we can't download someone else’s work. We can use AI to generate this line art instead. For this, you can utilize a specific model known as a Lora.
- Create an account on Civitai and download the anime line art Lora model. Follow the instructions to install the Lora in your system.
- Next, download the Easy Negative textual inversion and paste the file in the embeddings folder of your system.
- If you choose to use bad hands Lora, repeat the downloading and embedding process for that as well.
Step 3: Generate the Image
After you have set everything up, let’s generate an initial line art image:
- Open the Stable Diffusion Web UI and select the appropriate Lora model.
- For your image dimensions, set your width and height; for example, 500 by 800 pixels.
- In the negative prompts section, enter "architectural inversions" along with your "Easy Negative" and "bad hands" prompts.
For the main prompt, you might use something like "one girl in a maid outfit." Don’t forget to include "line art" and "monochrome" at the end of your prompt.
Once you've entered all the details, hit generate and see what comes out!
Step 4: Colorize with ControlNet
After generating your line art, save the image and disable the Lora model. Now, we’re ready to colorize the image.
- Go to the ControlNet section, upload the image you just generated, and confirm that the resolutions match exactly to avoid distortion in the details.
- Enable the ControlNet feature, then select the type as "Pixel Perfect," and choose "line art" as your model.
- Set the pre-processing to "line art standard from white background and black line," and ensure de Control mode is set to “controlling” with resize mode as “resize viewer.”
On the first try, you might need to download a large file (around 200 MB) for the line art model. However, if it's already in your system, the generation will be quite quick.
Initially, if you see a black and white image after running the model, it is likely due to your prompt still containing "line art" and "monochrome." Remove these and generate again.
Upon doing this, you should see a beautifully colored picture!
If the image appears slightly blurry, consider adjusting the upscaling settings or the denoising strength according to your preferences.
Conclusion
That wraps up our tutorial on how to colorize anime line art using Stable Diffusion and various AI models. If you encounter any difficulties or have any questions, feel free to reach out! Join our Discord community for additional help, and I look forward to seeing your creations soon.
Keywords
- Colorization
- Anime Line Art
- Stable Diffusion
- ControlNet
- Lora Model
- Image Generation
- Easy Negative
- Textual Inversion
FAQ
Q1: What is ControlNet in Stable Diffusion?
A1: ControlNet is an extension used within Stable Diffusion to better guide the generation process, particularly with images, by providing additional control over prompts and models.
Q2: Do I need any specific models to colorize line art?
A2: Yes, you need models like the anime line art model and the Easy Negative for optimal colorization results.
Q3: What should I do if the generated image is blurry?
A3: You can increase the upscaling settings or adjust the denoising strength in your Stable Diffusion settings to improve image clarity.
Q4: Can I generate my own line art without using existing works?
A4: Absolutely! You can use AI models, specifically Lora, to create original line art for your projects.
Q5: Where can I find the Lora models?
A5: Lora models can be found on websites like Civitai. You can create an account and download the necessary files from there.
