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SSD: Single Shot MultiBox Detector(for apples)

用于亚太数模竞赛

本程序为2023亚太数模赛赛题一的部分程序源代码 主要基于SSD实现了对苹果的识别 同时进行了对每张图片的苹果的数量,位置,成熟度,质量等参数进行统计和制表 然而比赛时模型训练尚不成熟,有待修改

以下为原作者Readme,再次感谢

环境配置:

  • Python 3.6/3.7/3.8
  • Pytorch 1.7.1
  • pycocotools(Linux:pip install pycocotools; Windows:pip install pycocotools-windows(不需要额外安装vs))
  • Ubuntu或Centos(不建议Windows)
  • 最好使用GPU训练

文件结构:

├── src: 实现SSD模型的相关模块    
│     ├── resnet50_backbone.py   使用resnet50网络作为SSD的backbone  
│     ├── ssd_model.py           SSD网络结构文件 
│     └── utils.py               训练过程中使用到的一些功能实现
├── train_utils: 训练验证相关模块(包括cocotools)  
├── my_dataset.py: 自定义dataset用于读取VOC数据集    
├── train_ssd300.py: 以resnet50做为backbone的SSD网络进行训练    
├── train_multi_GPU.py: 针对使用多GPU的用户使用    
├── predict_test.py: 简易的预测脚本,使用训练好的权重进行预测测试    
├── pascal_voc_classes.json: pascal_voc标签文件    
├── plot_curve.py: 用于绘制训练过程的损失以及验证集的mAP
└── validation.py: 利用训练好的权重验证/测试数据的COCO指标,并生成record_mAP.txt文件

预训练权重下载地址(下载后放入src文件夹中):

数据集,本例程使用的是PASCAL VOC2012数据集(下载后放入项目当前文件夹中)

训练方法

  • 确保提前准备好数据集
  • 确保提前下载好对应预训练模型权重
  • 单GPU训练或CPU,直接使用train_ssd300.py训练脚本
  • 若要使用多GPU训练,使用 "python -m torch.distributed.launch --nproc_per_node=8 --use_env train_multi_GPU.py" 指令,nproc_per_node参数为使用GPU数量
  • 训练过程中保存的results.txt是每个epoch在验证集上的COCO指标,前12个值是COCO指标,后面两个值是训练平均损失以及学习率

如果对SSD算法原理不是很理解可参考原up的bilibili

进一步了解该项目,以及对SSD算法代码的分析可参考原up的bilibili

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