# Keras深度学习脚手架
本项目是在完成深度学习作业时,因实验较多,所以代码逐渐积累形成。当时解决的问题主要是对于分类问题可以方便的切换数据集和模型,并
清晰记录实验结果。
目前实现的feature:
- data loader和model模块化
- 通用的分类数据集处理工具,一键生成并读取分类数据集
- 自动从最近的checkpoint恢复训练或直接读取网络参数文件
## data loader
代码的`dataset`文件夹下存放各个数据集,每个数据集下需在`data_loader.py`中实现`DataLoader`类的`get`方法,具体可参考
`dataset/mnist/data_loader.py`
### 分类任务通用data loader
针对分类任务,有封装好`Process`和`ClassifyDataset`两个类分别用于生成分类数据集和读取分类数据,具体可参考
`dataset/cat_dog/data_loader.py`
首先将样本按照类别放在不同的文件夹中,`Process`会读取每个文件夹并记录对应标签,按照划分比例划分为训练集、验证集和测试集。
如果运行正确,会在目标文件夹下生成一个`JPEGImages`文件夹存放所有图片,和四个csv文件,分别对应所有样本和划分的三个集合。
`ClassifyDataset`则会将上面生成的图片和csv文件封装成`tf.data.Dataset`,所以只需实现自己的数据增强部分即可。
## model
所有的model需要在`models/__init__.py`中导出
**注意:建议在实现时使用`__all__`来控制导出,如:```__all__ = ('ResNet50', 'ResNet50V2')```**
## 实验记录
每一次执行都需要指定实验名称,每次实验的log都保存在`dataset/${dataset}/exp/${exp_name}`下,每个log目录又分为如下结构:
```
exp/
├── ckpt // 保存的checkpoint文件,当resume=ckpt的时候会自动从最近一次的ckpt恢复训练
├── log.txt // 训练日志
└── tb-logs // TensorBoard日志
```
## 运行试验
实验所需的全部参数在`utils/flags.py`中定义,快速开始可以参考`scripts`文件夹中的bash文件,例如:
```shell script
export CUDA_VISIBLE_DEVICES="0"
python3 main.py \
--batch_size=128 \
--exp_name="test" \
--dataset="mnist" \
--model="lenet" \
--mode="train_test" \
--early_stopping_patience=10 \
--epoch=20 \
--debug
```
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