调用```paddle.init```指定使用4卡GPU训练；调用```data_provider.Settings```配置数据预处理所需参数，其中```cfg.IMG_HEIGHT```和```cfg.IMG_WIDTH```在配置文件```config/vgg_config.py```中设置，这里均为300，300x300是一个典型配置，兼顾效率和检测精度，也可以通过修改配置文件扩展到500x500；调用```train```执行训练，其中```train_file_list```指定训练数据列表，```dev_file_list```指定评估数据列表，```init_model_path```指定预训练模型位置。训练过程中会打印一些日志信息，每训练10个batch会输出当前的轮数、当前batch的cost及mAP（mean Average Precision），每训练一个pass，会保存一次模型，默认保存在```checkpoints```目录下（注：需事先创建）。
1.Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian Szegedy, Scott Reed, Cheng-Yang Fu, Alexander C. Berg. "SSD: Single shot multibox detector." European conference on computer vision. Springer, Cham, 2016.
2.Simonyan, Karen, and Andrew Zisserman. "Very deep convolutional networks for large-scale image recognition." arXiv preprint arXiv:1409.1556 (2014).
1.[Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian Szegedy, Scott Reed, Cheng-Yang Fu, Alexander C. Berg. "SSD: Single shot multibox detector." European conference on computer vision. Springer, Cham, 2016.](https://arxiv.org/abs/1512.02325)
2.[Simonyan, Karen, and Andrew Zisserman. "Very deep convolutional networks for large-scale image recognition." arXiv preprint arXiv:1409.1556 (2014).](https://arxiv.org/abs/1409.1556)
调用```paddle.init```指定使用4卡GPU训练；调用```data_provider.Settings```配置数据预处理所需参数，其中```cfg.IMG_HEIGHT```和```cfg.IMG_WIDTH```在配置文件```config/vgg_config.py```中设置，这里均为300，300x300是一个典型配置，兼顾效率和检测精度，也可以通过修改配置文件扩展到500x500；调用```train```执行训练，其中```train_file_list```指定训练数据列表，```dev_file_list```指定评估数据列表，```init_model_path```指定预训练模型位置。训练过程中会打印一些日志信息，每训练10个batch会输出当前的轮数、当前batch的cost及mAP（mean Average Precision），每训练一个pass，会保存一次模型，默认保存在```checkpoints```目录下（注：需事先创建）。
1. Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian Szegedy, Scott Reed, Cheng-Yang Fu, Alexander C. Berg. "SSD: Single shot multibox detector." European conference on computer vision. Springer, Cham, 2016.
2. Simonyan, Karen, and Andrew Zisserman. "Very deep convolutional networks for large-scale image recognition." arXiv preprint arXiv:1409.1556 (2014).
3. The PASCAL Visual Object Classes Challenge 2007. http://host.robots.ox.ac.uk/pascal/VOC/voc2007/index.html
1. [Wei Liu, Dragomir Anguelov, Dumitru Erhan, Christian Szegedy, Scott Reed, Cheng-Yang Fu, Alexander C. Berg. "SSD: Single shot multibox detector." European conference on computer vision. Springer, Cham, 2016.](https://arxiv.org/abs/1512.02325)
2. [Simonyan, Karen, and Andrew Zisserman. "Very deep convolutional networks for large-scale image recognition." arXiv preprint arXiv:1409.1556 (2014).](https://arxiv.org/abs/1409.1556)
