mindspore/model_zoo/official/cv/googlenet/README.md

# Contents

- [GoogleNet Description](#googlenet-description)
- [Model Architecture](#model-architecture)
- [Dataset](#dataset)
- [Features](#features)
    - [Mixed Precision](#mixed-precision)
- [Environment Requirements](#environment-requirements)
- [Quick Start](#quick-start)    
- [Script Description](#script-description)
    - [Script and Sample Code](#script-and-sample-code)
    - [Script Parameters](#script-parameters)
    - [Training Process](#training-process)
        - [Training](#training)
        - [Distributed Training](#distributed-training)  
    - [Evaluation Process](#evaluation-process)
        - [Evaluation](#evaluation)
- [Model Description](#model-description)
    - [Performance](#performance)  
        - [Evaluation Performance](#evaluation-performance)
        - [Inference Performance](#evaluation-performance)
    - [How to use](#how-to-use)
        - [Inference](#inference) 
        - [Continue Training on the Pretrained Model](#continue-training-on-the-pretrained-model)
       - [Transfer Learning](#transfer-learning)
- [Description of Random Situation](#description-of-random-situation)
- [ModelZoo Homepage](#modelzoo-homepage)


# [GoogleNet Description](#contents)

GoogleNet, a 22 layers deep network, was proposed in 2014 and won the first place in the ImageNet Large-Scale Visual Recognition Challenge 2014 (ILSVRC14).  GoogleNet, also called Inception v1, has significant improvement over ZFNet (The winner in 2013) and AlexNet (The winner in 2012), and has relatively lower error rate compared to VGGNet.  Typically deeper deep learning network means larger number of parameters, which makes it more prone to overfitting. Furthermore, the increased network size leads to increased use of computational resources. To tackle these issues, GoogleNet adopts 1*1 convolution middle of the network to reduce dimension, and thus further reduce the computation. Global average pooling is used at the end of the network, instead of using fully connected layers.  Another technique, called inception module, is to have different sizes of convolutions for the same input and stacking all the outputs. 

[Paper](https://arxiv.org/abs/1409.4842):  Christian Szegedy, Wei Liu, Yangqing Jia, Pierre Sermanet, Scott Reed, Dragomir Anguelov, Dumitru Erhan, Vincent Vanhoucke, Andrew Rabinovich. "Going deeper with convolutions." *Proceedings of the IEEE conference on computer vision and pattern recognition*. 2015.


# [Model Architecture](#contents)

Specifically, the GoogleNet contains numerous inception modules, which are connected together to go deeper.  In general, an inception module with dimensionality reduction consists of **1×1 conv**, **3×3 conv**, **5×5 conv**, and **3×3 max pooling**, which are done altogether for the previous input, and stack together again at output. In our model architecture, the kernel size used in inception module is 3×3 instead of 5×5.



# [Dataset](#contents)
Note that you can run the scripts based on the dataset mentioned in original paper or widely used in relevant domain/network architecture. In the following sections, we will introduce how to run the scripts using the related dataset below.

Dataset used: [CIFAR-10](<http://www.cs.toronto.edu/~kriz/cifar.html>) 

- Dataset size：175M，60,000 32*32 colorful images in 10 classes
  - Train：146M，50,000 images  
  - Test：29M，10,000 images 
- Data format：binary files
  - Note：Data will be processed in src/dataset.py

Dataset used can refer to paper.

- Dataset size: 125G, 1250k colorful images in 1000 classes
	- Train: 120G, 1200k images
	- Test: 5G, 50k images
- Data format: RGB images.
	- Note: Data will be processed in src/dataset.py 

# [Features](#contents)

## Mixed Precision

The [mixed precision](https://www.mindspore.cn/tutorial/training/en/master/advanced_use/enable_mixed_precision.html) training method accelerates the deep learning neural network training process by using both the single-precision and half-precision data formats, and maintains the network precision achieved by the single-precision training at the same time. Mixed precision training can accelerate the computation process, reduce memory usage, and enable a larger model or batch size to be trained on specific hardware. 
For FP16 operators, if the input data type is FP32, the backend of MindSpore will automatically handle it with reduced precision. Users could check the reduced-precision operators by enabling INFO log and then searching ‘reduce precision’.



# [Environment Requirements](#contents)

- Hardware（Ascend/GPU）
  - Prepare hardware environment with Ascend or GPU processor. If you want to try Ascend  , please send the [application form](https://obs-9be7.obs.cn-east-2.myhuaweicloud.com/file/other/Ascend%20Model%20Zoo%E4%BD%93%E9%AA%8C%E8%B5%84%E6%BA%90%E7%94%B3%E8%AF%B7%E8%A1%A8.docx) to ascend@huawei.com. Once approved, you can get the resources. 
- Framework
  - [MindSpore](https://www.mindspore.cn/install/en)
- For more information, please check the resources below：
  - [MindSpore Tutorials](https://www.mindspore.cn/tutorial/training/en/master/index.html)
  - [MindSpore Python API](https://www.mindspore.cn/doc/api_python/en/master/index.html)



# [Quick Start](#contents)

After installing MindSpore via the official website, you can start training and evaluation as follows: 

- runing on Ascend

  ```python
  # run training example
  python train.py > train.log 2>&1 & 
  
  # run distributed training example
  sh scripts/run_train.sh rank_table.json
  
  # run evaluation example
  python eval.py > eval.log 2>&1 & 
  OR
  sh run_eval.sh
  ```

  For distributed training, a hccl configuration file with JSON format needs to be created in advance.

  Please follow the instructions in the link below:

  https://gitee.com/mindspore/mindspore/tree/master/model_zoo/utils/hccl_tools.

- running on GPU

  For running on GPU, please change `device_target` from `Ascend` to `GPU` in configuration file src/config.py

  ```python
  # run training example
  export CUDA_VISIBLE_DEVICES=0
  python train.py > train.log 2>&1 & 
  
  # run distributed training example
  sh scripts/run_train_gpu.sh 8 0,1,2,3,4,5,6,7
  
  # run evaluation example
  python eval.py --checkpoint_path=[CHECKPOINT_PATH] > eval.log 2>&1 &  
  OR
  sh run_eval_gpu.sh [CHECKPOINT_PATH]
  ```


We use CIFAR-10 dataset by default. Your can also pass `$dataset_type` to the scripts so that select different datasets. For more details, please refer the specify script.


# [Script Description](#contents)

## [Script and Sample Code](#contents)

```
├── model_zoo
    ├── README.md                          // descriptions about all the models
    ├── googlenet        
        ├── README.md                    // descriptions about googlenet
        ├── scripts 
        │   ├──run_train.sh             // shell script for distributed on Ascend
        │   ├──run_train_gpu.sh         // shell script for distributed on GPU
        │   ├──run_eval.sh              // shell script for evaluation on Ascend
        │   ├──run_eval_gpu.sh          // shell script for evaluation on GPU
        ├── src 
        │   ├──dataset.py             // creating dataset
        │   ├──googlenet.py          // googlenet architecture
        │   ├──config.py            // parameter configuration 
        ├── train.py               // training script 
        ├── eval.py               //  evaluation script 
        ├── export.py            // export checkpoint files into air/onnx 
```

## [Script Parameters](#contents)

Parameters for both training and evaluation can be set in config.py

- config for GoogleNet, CIFAR-10 dataset

  ```python
  'pre_trained': 'False'    # whether training based on the pre-trained model
  'nump_classes': 10        # the number of classes in the dataset
  'lr_init': 0.1            # initial learning rate
  'batch_size': 128         # training batch size
  'epoch_size': 125         # total training epochs
  'momentum': 0.9           # momentum
  'weight_decay': 5e-4      # weight decay value
  'image_height': 224       # image height used as input to the model
  'image_width': 224        # image width used as input to the model
  'data_path': './cifar10'  # absolute full path to the train and evaluation datasets
  'device_target': 'Ascend' # device running the program
  'device_id': 0            # device ID used to train or evaluate the dataset. Ignore it when you use run_train.sh for distributed training
  'keep_checkpoint_max': 10 # only keep the last keep_checkpoint_max checkpoint
  'checkpoint_path': './train_googlenet_cifar10-125_390.ckpt'  # the absolute full path to save the checkpoint file
  'onnx_filename': 'googlenet.onnx' # file name of the onnx model used in export.py
  'air_filename': 'googlenet.air' # file name of the air model used in export.py
  ```

For more configuration details, please refer the script `config.py`.

## [Training Process](#contents)

### Training 

- running on Ascend

  ```
  python train.py > train.log 2>&1 & 
  ```
  
  The python command above will run in the background, you can view the results through the file `train.log`.
  
  After training, you'll get some checkpoint files under the script folder by default. The loss value will be achieved as follows:
  
  ```
  # grep "loss is " train.log
  epoch: 1 step: 390, loss is 1.4842823
  epcoh: 2 step: 390, loss is 1.0897788
  ...
  ```
  
  The model checkpoint will be saved in the current directory. 

- running on GPU

  ```
  export CUDA_VISIBLE_DEVICES=0
  python train.py > train.log 2>&1 & 
  ```

  The python command above will run in the background, you can view the results through the file `train.log`.
  
  After training, you'll get some checkpoint files under the folder `./ckpt_0/` by default.


### Distributed Training

- running on Ascend

  ```
  sh scripts/run_train.sh rank_table.json
  ```
  
  The above shell script will run distribute training in the background. You can view the results through the file `train_parallel[X]/log`. The loss value will be achieved as follows:
  
  ```
  # grep "result: " train_parallel*/log
  train_parallel0/log:epoch: 1 step: 48, loss is 1.4302931
  train_parallel0/log:epcoh: 2 step: 48, loss is 1.4023874
  ...
  train_parallel1/log:epoch: 1 step: 48, loss is 1.3458025
  train_parallel1/log:epcoh: 2 step: 48, loss is 1.3729336
  ...
  ...
  ```

- running on GPU

  ```
  sh scripts/run_train_gpu.sh 8 0,1,2,3,4,5,6,7
  ```
  
  The above shell script will run distribute training in the background. You can view the results through the file `train/train.log`.


## [Evaluation Process](#contents)

### Evaluation

- evaluation on CIFAR-10 dataset when running on Ascend

  Before running the command below, please check the checkpoint path used for evaluation. Please set the checkpoint path to be the absolute full path, e.g., "username/googlenet/train_googlenet_cifar10-125_390.ckpt".
  
  ```
  python eval.py > eval.log 2>&1 &  
  OR
  sh scripts/run_eval.sh
  ```
  
  The above python command will run in the background. You can view the results through the file "eval.log". The accuracy of the test dataset will be as follows:
  
  ```
  # grep "accuracy: " eval.log
  accuracy: {'acc': 0.934}
  ```
  
  Note that for evaluation after distributed training, please set the checkpoint_path to be the last saved checkpoint file such as "username/googlenet/train_parallel0/train_googlenet_cifar10-125_48.ckpt". The accuracy of the test dataset will be as follows:
  
  ```
  # grep "accuracy: " eval.log
  accuracy: {'acc': 0.9217}
  ```

- evaluation on CIFAR-10 dataset when running on GPU

  Before running the command below, please check the checkpoint path used for evaluation. Please set the checkpoint path to be the absolute full path, e.g., "username/googlenet/train/ckpt_0/train_googlenet_cifar10-125_390.ckpt".
  
  ```
  python eval.py --checkpoint_path=[CHECKPOINT_PATH] > eval.log 2>&1 &  
  ```
  
  The above python command will run in the background. You can view the results through the file "eval.log". The accuracy of the test dataset will be as follows:
  
  ```
  # grep "accuracy: " eval.log
  accuracy: {'acc': 0.930}
  ```

  OR,

  ```
  sh scripts/run_eval_gpu.sh [CHECKPOINT_PATH]
  ```
  
  The above python command will run in the background. You can view the results through the file "eval/eval.log". The accuracy of the test dataset will be as follows:
  
  ```
  # grep "accuracy: " eval/eval.log
  accuracy: {'acc': 0.930}
  ```

 


# [Model Description](#contents)
## [Performance](#contents)

### Evaluation Performance 

#### GoogleNet on CIFAR-10
| Parameters                 | Ascend                                                      | GPU                    |
| -------------------------- | ----------------------------------------------------------- | ---------------------- |
| Model Version              | Inception V1                                                | Inception V1           |
| Resource                   | Ascend 910 ；CPU 2.60GHz，192cores；Memory，755G             | NV SMX2 V100-32G       |
| uploaded Date              | 10/28/2020 (month/day/year)                                 | 10/28/2020 (month/day/year) |
| MindSpore Version          | 1.0.0                                                       | 1.0.0                  |
| Dataset                    | CIFAR-10                                                    | CIFAR-10               |
| Training Parameters        | epoch=125, steps=390, batch_size = 128, lr=0.1              | epoch=125, steps=390, batch_size=128, lr=0.1    |
| Optimizer                  | Momentum                                                    | Momentum               |
| Loss Function              | Softmax Cross Entropy                                       | Softmax Cross Entropy  |
| outputs                    | probability                                                 | probobility            |
| Loss                       | 0.0016                                                      | 0.0016                 |
| Speed                      | 1pc: 79 ms/step;  8pcs: 82 ms/step                          | 1pc: 150 ms/step;  8pcs: 164 ms/step      |
| Total time                 | 1pc: 63.85 mins;  8pcs: 11.28 mins                          | 1pc: 126.87 mins;  8pcs: 21.65 mins      | 
| Parameters (M)             | 13.0                                                        | 13.0                   |
| Checkpoint for Fine tuning | 43.07M (.ckpt file)                                         | 43.07M (.ckpt file)    |
| Model for inference        | 21.50M (.onnx file),  21.60M(.air file)                     |      | 
| Scripts                    | [googlenet script](https://gitee.com/mindspore/mindspore/tree/master/model_zoo/official/cv/googlenet) | [googlenet script](https://gitee.com/mindspore/mindspore/tree/master/model_zoo/official/cv/googlenet) |

#### GoogleNet on 1200k images
| Parameters                 | Ascend                                                      |
| -------------------------- | ----------------------------------------------------------- |
| Model Version              | Inception V1                                                |
| Resource                   | Ascend 910, CPU 2.60GHz, 56cores, Memory 314G               |
| uploaded Date              | 10/28/2020 (month/day/year)                                 |
| MindSpore Version          | 1.0.0                                                       |
| Dataset                    | 1200k images                                                |
| Training Parameters        | epoch=300, steps=5000, batch_size=256, lr=0.1               |
| Optimizer                  | Momentum                                                    |
| Loss Function              | Softmax Cross Entropy                                       |
| outputs                    | probability                                                 |
| Loss                       | 2.0                                                         |
| Speed                      | 1pc: 152 ms/step;  8pcs: 171 ms/step                        |
| Total time                 | 8pcs: 8.8 hours                                             |
| Parameters (M)             | 13.0                                                        |
| Checkpoint for Fine tuning | 52M (.ckpt file)                                            |
| Scripts                    | [googlenet script](https://gitee.com/mindspore/mindspore/tree/r0.7/model_zoo/official/cv/googlenet) | 


### Inference Performance

#### GoogleNet on CIFAR-10
| Parameters          | Ascend                      | GPU                         |
| ------------------- | --------------------------- | --------------------------- |
| Model Version       | Inception V1                | Inception V1                |
| Resource            | Ascend 910                  | GPU                         |
| Uploaded Date       | 10/28/2020 (month/day/year) | 10/28/2020 (month/day/year) |
| MindSpore Version   | 1.0.0                       | 1.0.0                       |
| Dataset             | CIFAR-10, 10,000 images     | CIFAR-10, 10,000 images     |
| batch_size          | 128                         | 128                         |
| outputs             | probability                 | probability                 |
| Accuracy            | 1pc: 93.4%;  8pcs: 92.17%   | 1pc: 93%, 8pcs: 92.89%      |
| Model for inference | 21.50M (.onnx file)         |  |

#### GoogleNet on 1200k images
| Parameters          | Ascend                      |
| ------------------- | --------------------------- |
| Model Version       | Inception V1                |
| Resource            | Ascend 910                  |
| Uploaded Date       | 10/28/2020 (month/day/year) |
| MindSpore Version   | 1.0.0                       |
| Dataset             | 1200k images                |
| batch_size          | 256                         |
| outputs             | probability                 |
| Accuracy            | 8pcs: 71.81%                |

## [How to use](#contents)
### Inference

If you need to use the trained model to perform inference on multiple hardware platforms, such as GPU, Ascend 910 or Ascend 310, you can refer to this [Link](https://www.mindspore.cn/tutorial/training/en/master/advanced_use/migrate_3rd_scripts.html). Following the steps below, this is a simple example:

- Running on Ascend

  ```
  # Set context
  context.set_context(mode=context.GRAPH_HOME, device_target=cfg.device_target)
  context.set_context(device_id=cfg.device_id)
  
  # Load unseen dataset for inference
  dataset = dataset.create_dataset(cfg.data_path, 1, False)
  
  # Define model 
  net = GoogleNet(num_classes=cfg.num_classes)
  opt = Momentum(filter(lambda x: x.requires_grad, net.get_parameters()), 0.01,
                 cfg.momentum, weight_decay=cfg.weight_decay)
  loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True, reduction='mean', 
                                          is_grad=False)
  model = Model(net, loss_fn=loss, optimizer=opt, metrics={'acc'})
  
  # Load pre-trained model
  param_dict = load_checkpoint(cfg.checkpoint_path)
  load_param_into_net(net, param_dict)
  net.set_train(False)
  
  # Make predictions on the unseen dataset
  acc = model.eval(dataset)
  print("accuracy: ", acc)
  ```

- Running on GPU:

  ```
  # Set context
  context.set_context(mode=context.GRAPH_HOME, device_target="GPU")
  
  # Load unseen dataset for inference
  dataset = dataset.create_dataset(cfg.data_path, 1, False)
  
  # Define model 
  net = GoogleNet(num_classes=cfg.num_classes)
  opt = Momentum(filter(lambda x: x.requires_grad, net.get_parameters()), 0.01,
                 cfg.momentum, weight_decay=cfg.weight_decay)
  loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True, reduction='mean', 
                                          is_grad=False)
  model = Model(net, loss_fn=loss, optimizer=opt, metrics={'acc'})
  
  # Load pre-trained model
  param_dict = load_checkpoint(args_opt.checkpoint_path)
  load_param_into_net(net, param_dict)
  net.set_train(False)
  
  # Make predictions on the unseen dataset
  acc = model.eval(dataset)
  print("accuracy: ", acc)

  ```

### Continue Training on the Pretrained Model 

- running on Ascend

  ```
  # Load dataset
  dataset = create_dataset(cfg.data_path, 1)
  batch_num = dataset.get_dataset_size()
  
  # Define model
  net = GoogleNet(num_classes=cfg.num_classes)
  # Continue training if set pre_trained to be True
  if cfg.pre_trained:
      param_dict = load_checkpoint(cfg.checkpoint_path)
      load_param_into_net(net, param_dict)
  lr = lr_steps(0, lr_max=cfg.lr_init, total_epochs=cfg.epoch_size,    
                steps_per_epoch=batch_num)
  opt = Momentum(filter(lambda x: x.requires_grad, net.get_parameters()), 
                 Tensor(lr), cfg.momentum, weight_decay=cfg.weight_decay)
  loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True, reduction='mean', is_grad=False)
  model = Model(net, loss_fn=loss, optimizer=opt, metrics={'acc'},
                amp_level="O2", keep_batchnorm_fp32=False, loss_scale_manager=None)
  
  # Set callbacks 
  config_ck = CheckpointConfig(save_checkpoint_steps=batch_num * 5, 
                               keep_checkpoint_max=cfg.keep_checkpoint_max)
  time_cb = TimeMonitor(data_size=batch_num)
  ckpoint_cb = ModelCheckpoint(prefix="train_googlenet_cifar10", directory="./", 
                               config=config_ck)
  loss_cb = LossMonitor()
  
  # Start training
  model.train(cfg.epoch_size, dataset, callbacks=[time_cb, ckpoint_cb, loss_cb])
  print("train success")
  ```

- running on GPU

  ```
  # Load dataset
  dataset = create_dataset(cfg.data_path, 1)
  batch_num = dataset.get_dataset_size()
  
  # Define model
  net = GoogleNet(num_classes=cfg.num_classes)
  # Continue training if set pre_trained to be True
  if cfg.pre_trained:
      param_dict = load_checkpoint(cfg.checkpoint_path)
      load_param_into_net(net, param_dict)
  lr = lr_steps(0, lr_max=cfg.lr_init, total_epochs=cfg.epoch_size,    
                steps_per_epoch=batch_num)
  opt = Momentum(filter(lambda x: x.requires_grad, net.get_parameters()), 
                 Tensor(lr), cfg.momentum, weight_decay=cfg.weight_decay)
  loss = nn.SoftmaxCrossEntropyWithLogits(sparse=True, reduction='mean', is_grad=False)
  model = Model(net, loss_fn=loss, optimizer=opt, metrics={'acc'},
                amp_level="O2", keep_batchnorm_fp32=False, loss_scale_manager=None)
  
  # Set callbacks 
  config_ck = CheckpointConfig(save_checkpoint_steps=batch_num * 5, 
                               keep_checkpoint_max=cfg.keep_checkpoint_max)
  time_cb = TimeMonitor(data_size=batch_num)
  ckpoint_cb = ModelCheckpoint(prefix="train_googlenet_cifar10", directory="./ckpt_" + str(get_rank()) + "/", 
                               config=config_ck)
  loss_cb = LossMonitor()
  
  # Start training
  model.train(cfg.epoch_size, dataset, callbacks=[time_cb, ckpoint_cb, loss_cb])
  print("train success")
  ```

### Transfer Learning
To be added.


# [Description of Random Situation](#contents)

In dataset.py, we set the seed inside “create_dataset" function. We also use random seed in train.py. 


# [ModelZoo Homepage](#contents)  
 Please check the official [homepage](https://gitee.com/mindspore/mindspore/tree/master/model_zoo).