OmniGen is a unified image generation model that can generate a wide range of images from multi-modal prompts. It is designed to be simple, flexible and easy to use. We provide inference code so that everyone can explore more functionalities of OmniGen.
Existing image generation models often require loading several additional network modules (such as ControlNet, IP-Adapter, Reference-Net, etc.) and performing extra preprocessing steps (e.g., face detection, pose estimation, cropping, etc.) to generate a satisfactory image. However, we believe that the future image generation paradigm should be more simple and flexible, that is, generating various images directly through arbitrarily multi-modal instructions without the need for additional plugins and operations, similar to how GPT works in language generation.
Due to the limited resources, OmniGen still has room for improvement. We will continue to optimize it, and hope it inspire more universal image generation models. You can also easily fine-tune OmniGen without worrying about designing networks for specific tasks; you just need to prepare the corresponding data, and then run the script. Imagination is no longer limited; everyone can construct any image generation task, and perhaps we can achieve very interesting, wonderful and creative things.
OmniGen is a unified image generation model that you can use to perform various tasks, including but not limited to text-to-image generation, subject-driven generation, Identity-Preserving Generation, image editing, and image-conditioned generation. OmniGen don't need additional plugins or operations, it can automatically identify the features (e.g., required object, human pose, depth mapping) in input images according the text prompt.
We showcase some examples in inference.ipynb. And in inference_demo.ipynb, we show a insteresting pipeline to generate and modify a image.
If you are not entirely satisfied with certain functionalities or wish to add new capabilities, you can try fine-tuning OmniGen.
1from OmniGen import OmniGenPipeline
23pipe = OmniGenPipeline.from_pretrained("Shitao/OmniGen-v1")45# Text to Image6images = pipe(7 prompt="A curly-haired man in a red shirt is drinking tea.",8 height=1024,9 width=1024,10 guidance_scale=2.5,11 seed=0,12)13images[0].save("example_t2i.png")# save output PIL Image1415# Multi-modal to Image16# In prompt, we use the placeholder to represent the image. The image placeholder should be in the format of <img><|image_*|></img>17# You can add multiple images in the input_images. Please ensure that each image has its placeholder. For example, for the list input_images [img1_path, img2_path], the prompt needs to have two placeholders: <img><|image_1|></img>, <img><|image_2|></img>.18images = pipe(19 prompt="A man in a black shirt is reading a book. The man is the right man in <img><|image_1|></img>."20 input_images=["./imgs/test_cases/two_man.jpg"]21 height=1024,22 width=1024,23 separate_cfg_infer=False,# if OOM, you can set separate_cfg_infer=True 24 guidance_scale=3,25 img_guidance_scale=1.626)27images[0].save("example_ti2i.png")# save output PIL image
If you find this repository useful, please consider giving a star ⭐ and citation
@article{xiao2024omnigen,
title={Omnigen: Unified image generation},
author={Xiao, Shitao and Wang, Yueze and Zhou, Junjie and Yuan, Huaying and Xing, Xingrun and Yan, Ruiran and Wang, Shuting and Huang, Tiejun and Liu, Zheng},
journal={arXiv preprint arXiv:2409.11340},
year={2024}
}
