[LAB 10 · 从 RGB 图像训练小型检测器](/course/notebooks/a14237bfa9dd413d959ab4e458e11f42.html)

# 选读热身：四维分类的参数更新 · 实现代码
[独立阅读](/course/notebook-blocks/359eb6716e0e4a48b9c8477fcd25be5b.html)
主线阅读与优先实验

RGB图像、单特征层锚框检测器、分类/位置损失、NMS、独立检测评价
展开完整实现代码
```
import os, tempfile
from pathlib import Path
# Isolated ephemeral workspace supports detached runs with readonly project storage.
SPATIAL_RUN_DIR = Path(tempfile.mkdtemp(prefix='lecture03-'))
os.chdir(SPATIAL_RUN_DIR)
print('Ephemeral experiment directory:', SPATIAL_RUN_DIR)
```