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技术解读

以下内容由 GitRead 中文社区 编辑团队基于项目 README 与官方资料整理, 结合中文开发者的常见使用场景补充技术选型建议。具体以项目官方文档为准。

[ECCV 2024] MOFA-Video: 可控制图像动画生成的创新技术

项目背景与痛点

MOFA-Video 项目由 MyNiuuu 团队推出,旨在提供一种通过生成运动场适应性在冻结的图像到视频扩散模型中实现可控图像动画的新方法。这个问题的核心在于如何在保持图像结构和细节的基础上,生成流畅自然的动画效果。传统的图像到视频的方法通常依赖于复杂的深度学习模型和大量的数据,但其生成结果往往容易出现不自然的运动轨迹或细节模糊。MOFA-Video 项目通过引入生成运动场的概念,能够在冻结的图像帧中插入自然的动态效果,从而创建逼真的动画图像。

核心技术揭秘

MOFA-Video 创新地采用了冻结的图像到视频扩散模型,并引入了生成运动场来实现动态效果。其背后的设计思想在于如何在保持图像高保真度的同时,通过可控的运动场实现图像动画化。项目的核心技术栈包括深度学习模型、图像处理技术以及运动场分析技术。

graph TD A[用户请求] --> B[图像输入] B --> C{"模型加载"} C -->|"成功"| D[生成运动场] C -->|"失败"| E[异常处理] D --> F[应用运动场] F --> G[输出动画] G --> H{"结果校验"} H -->|"通过"| I[视频导出] H -->|"失败"| J[错误日志]

技术架构与实现

MOFA-Video 的技术架构包括以下几个关键部分:

  1. 图像输入模块:负责接收和预处理输入图像。
  2. 模型加载模块:负责加载冻结的图像到视频扩散模型。
  3. 生成运动场模块:通过优化算法生成适宜的运动场以适应动画效果。
  4. 应用运动场模块:将生成的运动场应用到图像上,产生动画效果。
  5. 结果校验模块:检测生成的动画效果是否满足要求。
  6. 视频导出模块:输出符合要求的动图像或视频流。

功能亮点与差异

相较于同类竞品,MOFA-Video 的核心优势在于通过生成运动场技术实现了对图像动画化的可控调整。这种创新不仅在视觉效果上更自然流畅,同时还能更好地保持图像的高保真度。此外,MOFA-Video 在如何权衡生成效果和计算效率方面也取得了显著的进步,使得该技术不仅适用于高质量的动画生成,而且在计算资源有限的环境下也具备高效性。

应用场景与落地建议

MOFA-Video 适合在以下业务场景中应用:

  • 数字广告制作:创建动态图像广告,增强广告效果。
  • 虚拟现实与增强现实:实现更加逼真的虚拟或增强现实场景。
  • 数字艺术创作:艺术家可以通过该技术快速生成高质量的动画图像,进行创作。

在生产环境中使用 MOFA-Video 时,应关注以下几个方面:

  • 输入图像质量:高质量的输入图像是生成高质量动画的关键。
  • 计算资源:由于该技术需要进行复杂的图像处理和优化运算,因此需要充足的计算资源。
  • 结果验证:在生成动画效果后,需要进行严格的校验以保证输出结果的自然性和保真度。

综合评价

优点

  • 创新性:生成运动场技术开创了一种新的图像动画生成方式。
  • 高效性:在高保真度与计算效率之间找到了平衡点。
  • 可控制性:用户可以自由调整动画效果,实现更自然的动态表现。

缺点

  • 计算资源需求高:生成高质量的动画需要大量的计算资源。
  • 输入图像要求较高:为了保证最终效果的质量,输入图像需具备较高的分辨率和清晰度。

总体而言,MOFA-Video 项目无疑为图像动画领域带来了新的解决方案,其通过创新的方法和技术实现了更高的效率与更自然的动态效果,具备极高的应用价值。

关于

GitHub 原始描述(英文)

[ECCV 2024] MOFA-Video: Controllable Image Animation via Generative Motion Field Adaptions in Frozen Image-to-Video Diffusion Model.

描述取自 GitHub 官方 API,保持仓库作者书写的原文。

简要分析

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活跃

语言占比

CSS
Python
Shell

README

🦄️ MOFA-Video: Controllable Image Animation via Generative Motion Field Adaptions in Frozen Image-to-Video Diffusion Model (ECCV 2024)

1 The University of Tokyo   2 Tencent AI Lab   * Corresponding Author  

In European Conference on Computer Vision (ECCV) 2024

     

🔥🔥🔥 New Features/Updates

  • (2024.08.07) We have released the inference script for keypoint-based facial image animation! Please refer to Here for more instructions.

  • (2024.07.15) We have released the training code for trajectory-based image animation! Please refer to Here for more instructions.

  • MOFA-Video will be appeared in ECCV 2024! 🇮🇹🇮🇹🇮🇹

  • We have released the Gradio inference code and the checkpoints for Hybrid Controls! Please refer to Here for more instructions.

  • Free online demo via HuggingFace Spaces will be coming soon!

  • If you find this work interesting, please do not hesitate to give a ⭐!

📰 CODE RELEASE

  • (2024.05.31) Gradio demo and checkpoints for trajectory-based image animation
  • (2024.06.22) Gradio demo and checkpoints for image animation with hybrid control
  • (2024.07.15) Training scripts for trajectory-based image animation
  • (2024.08.07) Inference scripts and checkpoints for keypoint-based facial image animation
  • Training scripts for keypoint-based facial image animation

TL;DR

Image 🏞️ + Hybrid Controls 🕹️ = Videos 🎬🍿




Trajectory + Landmark Control




Trajectory Control





Landmark Control
Check the gallery of our project page for more visual results!

Introduction

We introduce MOFA-Video, a method designed to adapt motions from different domains to the frozen Video Diffusion Model. By employing sparse-to-dense (S2D) motion generation and flow-based motion adaptation, MOFA-Video can effectively animate a single image using various types of control signals, including trajectories, keypoint sequences, AND their combinations.

During the training stage, we generate sparse control signals through sparse motion sampling and then train different MOFA-Adapters to generate video via pre-trained SVD. During the inference stage, different MOFA-Adapters can be combined to jointly control the frozen SVD.

🕹️ Image Animation with Hybrid Controls

1. Clone the Repository
git clone https://github.com/MyNiuuu/MOFA-Video.git
cd ./MOFA-Video
2. Environment Setup

The demo has been tested on CUDA version of 11.7.

cd ./MOFA-Video-Hybrid
conda create -n mofa python==3.10
conda activate mofa
pip install -r requirements.txt
pip install opencv-python-headless
pip install "git+https://github.com/facebookresearch/pytorch3d.git"

IMPORTANT: ⚠️⚠️⚠️ Gradio Version of 4.5.0 in the requirements.txt should be strictly followed since other versions may cause errors.

3. Downloading Checkpoints
  1. Download the checkpoint of CMP from here and put it into ./MOFA-Video-Hybrid/models/cmp/experiments/semiauto_annot/resnet50_vip+mpii_liteflow/checkpoints.

  2. Download the ckpts folder from the huggingface repo which contains necessary pretrained checkpoints and put it under ./MOFA-Video-Hybrid. You may use git lfs to download the entire ckpts folder:

    1. Download git lfs from https://git-lfs.github.com. It is commonly used for cloning repositories with large model checkpoints on HuggingFace.
    2. Execute git clone https://huggingface.co/MyNiuuu/MOFA-Video-Hybrid to download the complete HuggingFace repository, which currently only includes the ckpts folder.
    3. Copy or move the ckpts folder to the GitHub repository.

    NOTE: If you encounter the error git: 'lfs' is not a git command on Linux, you can try this solution that has worked well for my case.

    Finally, the checkpoints should be orgnized as ./MOFA-Video-Hybrid/ckpt_tree.md.

4. Run Gradio Demo

Using audio to animate the facial part

cd ./MOFA-Video-Hybrid
python run_gradio_audio_driven.py

🪄🪄🪄 The Gradio Interface is displayed as below. Please refer to the instructions on the gradio interface during the inference process!

Using reference video to animate the facial part

cd ./MOFA-Video-Hybrid
python run_gradio_video_driven.py

🪄🪄🪄 The Gradio Interface is displayed as below. Please refer to the instructions on the gradio interface during the inference process!

💫 Trajectory-based Image Animation

Please refer to Here for instructions.

Training your own MOFA-Adapter

Please refer to Here for more instructions.

Citation

@article{niu2024mofa,
  title={MOFA-Video: Controllable Image Animation via Generative Motion Field Adaptions in Frozen Image-to-Video Diffusion Model},
  author={Niu, Muyao and Cun, Xiaodong and Wang, Xintao and Zhang, Yong and Shan, Ying and Zheng, Yinqiang},
  journal={arXiv preprint arXiv:2405.20222},
  year={2024}
}

Acknowledgements

We sincerely appreciate the code release of the following projects: DragNUWA, SadTalker, AniPortrait, Diffusers, SVD_Xtend, Conditional-Motion-Propagation, and Unimatch.

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