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# 微表情识别与检测
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**中文文档** | [English](README.md)
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基于 PyTorch 的端到端**微表情识别**(短片段)与**长视频微表情检测**框架,内置 Web 可视化平台。
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支持数据集:CASME2 / SAMM / SMIC-HS / CAS(ME)³
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---
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## 快速开始
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### 1. 配置环境
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```bash
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conda create -n me-env python=3.10
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conda activate me-env
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# GPU(CUDA 12.1)
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conda install pytorch torchvision torchaudio pytorch-cuda=12.1 -c pytorch -c nvidia
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# 仅 CPU
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# conda install pytorch torchvision torchaudio cpuonly -c pytorch
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pip install -r requirements.txt
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```
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### 2. 下载模型权重
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```python
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from huggingface_hub import snapshot_download
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snapshot_download(
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repo_id="ghy-cmd/micro-expression-weights",
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local_dir=".", # 自动还原 checkpoints/ 和 weights/ 目录
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)
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```
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### 3. 启动 Web 平台
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```bash
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python -m webapp.app
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# 浏览器访问 http://localhost:5001
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```
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---
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## 功能说明
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| 功能 | 说明 |
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|------|------|
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| **微表情识别** | 上传短视频片段,自动预处理后用模型进行情绪分类 |
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| **长视频微表情检测** | 上传任意长视频,自动人脸裁剪 + 滑窗推理,定位所有微表情区间 |
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---
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## 模型说明
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### 功能一 · 微表情识别
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对短片段分类为 **3 类情绪**:正向 / 负向 / 惊讶
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- HRNet 特征提取器,作用于 onset + apex 帧 → (2, 256, 64, 64)
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- TV-L1 光流(u, v, strain)→ (3, 256, 256)
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- Transformer 编码器,注意力融合(16 头 × 4 阶段,full guidance)
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- LOSO 交叉验证训练,训练集:Composite(CASME2 + SMIC-HS + SAMM)
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### 功能二 · 长视频微表情检测
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对任意长度视频定位所有微表情区间,并分类为 **4 类**:正向 / 负向 / 惊讶 / 其他
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- 滑窗推理(窗口 0.4s,步长 0.2s,@ 30fps)
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- 6 种尺度的多尺度时序特征
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- 双任务预测头:检测分数 + 情绪分类
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- 训练集:CAS(ME)³-LV
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- 评估指标:有重叠即 TP 的 F1
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---
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## 预处理流水线
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两个功能共用同一套预处理,与数据集预处理保持一致:
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1. **人脸裁剪**(dlib 68点关键点)→ 256×256
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2. **顶点帧检测**(光应变 + UPC)— 仅功能一
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3. **HRNet 特征提取** → (2, 256, 64, 64)
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4. **光流提取**(TV-L1)→ (3, 256, 256)
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---
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## 训练
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```bash
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# 识别 — LOSO 训练
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python train_loso.py --config configs/train_loso.yaml --dataset composite
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# 检测 — LOSO 训练
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python detection/train_detection.py --config configs/detection_config.yaml
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```
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详见 [docs/TRAINING_GUIDE.md](docs/TRAINING_GUIDE.md)。
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---
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## 项目结构
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```
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├── webapp/ # Web 可视化平台(Flask)
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│ ├── app.py # 入口 → http://localhost:5000
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│ ├── api/ # REST API(识别 + 检测)
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│ └── core/ # 推理封装
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├── models/ # 模型结构
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├── detection/ # 检测训练与评估
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├── trainers/ # 识别训练工具
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├── configs/ # YAML 配置文件
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├── datasets/ # 数据集加载器
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├── utils/ # 公共工具
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├── docs/ # 文档与可视化脚本
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├── train_loso.py # 识别 LOSO 训练脚本
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└── requirements.txt
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```
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---
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## 许可证
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[CC BY-NC 4.0](https://creativecommons.org/licenses/by-nc/4.0/) — 允许学术研究与个人使用,**禁止商业用途**。
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