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CLIP-GEN

[简体中文][English]

本项目在萤火二号集群上用 PyTorch 实现了论文 《CLIP-GEN: Language-Free Training of a Text-to-Image Generator with CLIP》。

clip-gen

CLIP-GEN 是一个 Language-Free 的文本生成图像的方法,它不依赖图文训练样本,通过预训练 CLIP 模型的强大表征能力,只需要图片数据就可以训练出一个文本生成图像的模型。该方法的基本原理是:CLIP-GEN 首先会训练一个 VQ-GAN,把图片映射到离散空间;然后再训练一个 GPT 模型,把 CLIP embedding 映射到 VQ-GAN 的离散空间;由于在 CLIP 中,文本和图像共享一个特征空间,在 inference 的时候我们就可以通过同样的方法把文本映射到 VQ-GAN 的离散空间,然后 decode 为 RGB 图像。

Requirements

Training

支持的数据集:coco, imagenet, googlecc

  1. 下载 CLIP 预训练模型

    下载 CLIP 后放至 pretrained/clip_vit_b32.pt,该预训练模型来自 OpenAI.

  2. 在 COCO 上训练 VQGAN

    提交任务至萤火集群:

    hfai python train_vqgan.py --ds coco -- -n 1 -p 30

    本地运行:

    python train_vqgan.py --ds coco
  3. 在 COCO 上训练 Conditional GPT

    提交任务至萤火集群:

    hfai python train_gpt.py --ds coco --vqgan_ckpt /path/to/vqgan/ckpt -- -n 4 -p 30

    本地运行:

    python train_gpt.py --ds coco --vqgan_ckpt /path/to/vqgan/ckpt

Demo

下载在 COCO 上训练好的 VQGANGPT 模型,分别放到 pretrained/vqgan_coco.ptpretrained/gpt_coco.pt;然后运行:

python demo.py --text "A city bus driving on the city street" --out "bus.jpg"

NOTE: demo 的运行不依赖 hfai,用户可以在装有 PyTorch 的环境下直接使用

Samples

下面是一些文本生成图像的样本:

tower bus living train skiing

References

Citation

@article{wang2022clip,
  title={CLIP-GEN: Language-Free Training of a Text-to-Image Generator with CLIP},
  author={Wang, Zihao and Liu, Wei and He, Qian and Wu, Xinglong and Yi, Zili},
  journal={arXiv preprint arXiv:2203.00386},
  year={2022}
}

TODO

  • 预训练模型
  • FFRecord 数据

clip-gen's People

Contributors

kinglittleq avatar vachelhu avatar

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