Model by Lyumin Zhang

Usage

Input an image, and prompt the model to generate an image as you would for Stable Diffusion.

Model description

This model is ControlNet adapting Stable Diffusion to use a depth map of an input image in addition to a text input to generate an output image.

ControlNet is a neural network structure which allows control of pretrained large diffusion models to support additional input conditions beyond prompts. The ControlNet learns task-specific conditions in an end-to-end way, and the learning is robust even when the training dataset is small (< 50k samples). Moreover, training a ControlNet is as fast as fine-tuning a diffusion model, and the model can be trained on a personal device. Alternatively, if powerful computation clusters are available, the model can scale to large amounts of training data (millions to billions of rows). Large diffusion models like Stable Diffusion can be augmented with ControlNets to enable conditional inputs like edge maps, segmentation maps, keypoints, etc.

Original model & code on GitHub

How is this different from Stable Diffusion 2.0’s official depth2img implementation?

ControlNet receives the full 512×512 depth map, rather than 64×64 depth. Note that Stability’s SD2 depth model use 64*64 depth maps. This means that the ControlNet will preserve more details in the depth map.

This is always a strength because if users do not want to preserve more details, they can simply use another SD to post-process an i2i. But if they want to preserve more details, ControlNet becomes their only choice. Again, SD2 uses 64×64 depth, we use 512×512.

Original model on GitHub

Other ControlNets

There are many different ways to use a ControlNet to modify the output of Stable Diffusion. Here are a few different options, all of which use an input image in addition to a prompt to generate an output. The methods process the input in different ways; try them out to see which works best for a given application.

ControlNet for generating images from drawings Scribble: https://replicate.com/jagilley/controlnet-scribble

ControlNets for generating humans based on input image Human Pose Detection: https://replicate.com/jagilley/controlnet-pose

ControlNets for preserving general qualities about an input image Edge detection: https://replicate.com/jagilley/controlnet-canny HED maps: https://replicate.com/jagilley/controlnet-hed Depth map: https://replicate.com/jagilley/controlnet-depth2img Hough line detection: https://replicate.com/jagilley/controlnet-hough Normal map: https://replicate.com/jagilley/controlnet-normal

Citation

@misc{https://doi.org/10.48550/arxiv.2302.05543,
  doi = {10.48550/ARXIV.2302.05543},
  url = {https://arxiv.org/abs/2302.05543},
  author = {Zhang, Lvmin and Agrawala, Maneesh},
  keywords = {Computer Vision and Pattern Recognition (cs.CV), Artificial Intelligence (cs.AI), Graphics (cs.GR), Human-Computer Interaction (cs.HC), Multimedia (cs.MM), FOS: Computer and information sciences, FOS: Computer and information sciences},
  title = {Adding Conditional Control to Text-to-Image Diffusion Models},
  publisher = {arXiv},
  year = {2023},
  copyright = {arXiv.org perpetual, non-exclusive license}
}