ResNet50_INT8_OpenVINO™
## 1. 项目功能
项目主要功能实现通过OpenVINO™中的POT工具,将ResNet50模型转为INT8格式。
## 2. 源码实现
项目实现源码已经放置在python文件夹下,获取源码后,对以下位置进行修改:
- 模型信息
```python
model_config = Dict({
'model_name': 'flower_clas',
'model': "E:\\Text_Model\\flowerclas20220427\\flower_clas.xml",
'weights': "E:\\Text_Model\\flowerclas20220427\\flower_clas.bin"
})
```
将该字典中的模型信息修改为自己本地地址。
- 测试数据信息
```python
dataset_config = {
'data_source': "E:\\Text_dataset\\flowers102\\val_list.txt",
'path': "E:\\Text_dataset\\flowers102\\"
}
```
将测试数据集修改为本地数据位置
运行main_resnet50_int8_openvino.py文件,进行模型转换,结果如下:
```python
Load the model.
Initialize the data loader.
Initialize the metric.
Initialize the engine for metric calculation and statistics collection.
Create a pipeline of compression algorithms.
Execute the pipeline.
Compress model weights quantized precision
Save the compressed model to the desired path.
Accuracy of the original model: accuracy@top1: 0.0
Accuracy of the optimized model: accuracy@top1: 0.0
Compare accuracy of the original and quantized models.
```
转换后的模型在D盘根目录下:
![image-20220427140007923](.image/image-20220427140007923.png)
## 3. OpenVINO™工具实现
OpenVINO™提供了精度转换工具,位置在<./openvino/tools/>文件夹下,其中需要使用的配置文件在该项目下<configs>文件夹下:ResNet50.yaml,ResNet50.json
### 3.1 修改配置文件
首先需要对配置文件中的路径进行修改,改为自己电脑的本地路径:
- ResNet50.yaml
```yaml
datasets:
- name: classification_dataset
data_source: E:/Text_dataset/flowers102/jpg
annotation_conversion:
converter: imagenet
annotation_file: E:/Text_dataset/flowers102/train_list.txt
reader: pillow_imread
```
修改data_source与annotation_file路径地址。
- ResNet50.json
```json
"model": {
"model_name": "flower_clas",
"model": "E:\\Text_Model\\flowerclas20220427\\flower_clas.xml",
"weights": "E:\\Text_Model\\flowerclas20220427\\flower_clas.bin"
},
"engine": {
"config": "./ResNet50.yaml"
},
```
根据本地文件路径,修改以上信息。
### 3.2 模型精度检测
命令提示窗口打开一下位置:.\openvino\tools
![image-20220427141354684](.image/image-20220427141354684.png)
输入以下命令:
```
accuracy_check -c ResNet50.yaml -m E:\\Text_Model\\flowerclas20220427
```
运行结果如下:
```shell
(pycharm_openvino) D:\ProgramFiles\anacoonda3\envs\pycharm_openvino\Lib\site-packages\openvino\tools>accuracy_check -c ResNet50.yaml -m E:\\Text_Model\\flowerclas20220427
Processing info:
model: ResNet50
launcher: openvino
device: CPU
dataset: classification_dataset
OpenCV version: 4.5.5
Annotation conversion for classification_dataset dataset has been started
Parameters to be used for conversion:
converter: imagenet
annotation_file: E:/Text_dataset/flowers102/train_list.txt
Annotation conversion for classification_dataset dataset has been finished
IE version: 2022.1.0-7019-cdb9bec7210-releases/2022/1
Loaded CPU plugin version:
CPU - openvino_intel_cpu_plugin: 2022.1.2022.1.0-7019-cdb9bec7210-releases/2022/1
Found model E:\Text_Model\flowerclas20220427\flower_clas.xml
Found weights E:\Text_Model\flowerclas20220427\flower_clas.bin
Input info:
Node name: x
Tensor names: x
precision: f32
shape: (1, 3, 224, 224)
Output info
Node name: softmax_1.tmp_0/sink_port_0
Tensor names: softmax_1.tmp_0
precision: f32
shape: (1, 102)
1019 objects processed in 38.744 seconds
accuracy@top1: 0.98%
accuracy@top5: 4.22%
```
精度检测结果如上所示,不过精度比较低,目前不知道什么原因。
### 3.3 模型量化INT8
在命令提示行输入以下命令:
```shell
pot -c ResNet50.json -e
```
运行结果如下:
```shell
(pycharm_openvino) D:\ProgramFiles\anacoonda3\envs\pycharm_openvino\Lib\site-packages\openvino\tools>pot -c ResNet50.json -e
INFO:openvino.tools.pot.app.run:Output log dir: ./results\flower_clas_DefaultQuantization\2022-04-27_14-25-06
INFO:openvino.tools.pot.app.run:Creating pipeline:
Algorithm: DefaultQuantization
Parameters:
preset : mixed
stat_subset_size : 300
target_device : ANY
model_type : None
dump_intermediate_model : False
inplace_statistics : True
exec_log_dir : ./results\flower_clas_DefaultQuantization\2022-04-27_14-25-06
===========================================================================
IE version: 2022.1.0-7019-cdb9bec7210-releases/2022/1
Loaded CPU plugin version:
CPU - openvino_intel_cpu_plugin: 2022.1.2022.1.0-7019-cdb9bec7210-releases/2022/1
Annotation conversion for classification_dataset dataset has been started
Parameters to be used for conversion:
converter: imagenet
annotation_file: E:/Text_dataset/flowers102/train_list.txt
Annotation conversion for classification_dataset dataset has been finished
INFO:openvino.tools.pot.pipeline.pipeline:Inference Engine version: 2022.1.0-7019-cdb9bec7210-releases/2022/1
INFO:openvino.tools.pot.pipeline.pipeline:Model Optimizer version: 2022.1.0-7019-cdb9bec7210-releases/2022/1
INFO:openvino.tools.pot.pipeline.pipeline:Post-Training Optimization Tool version: 2022.1.0-7019-cdb9bec7210-releases/2022/1
INFO:openvino.tools.pot.statistics.collector:Start computing statistics for algorithms : DefaultQuantization
INFO:openvino.tools.pot.statistics.collector:Computing statistics finished
INFO:openvino.tools.pot.pipeline.pipeline:Start algorithm: DefaultQuantization
INFO:openvino.tools.pot.algorithms.quantization.default.algorithm:Start computing statistics for algorithm : ActivationChannelAlignment
INFO:openvino.tools.pot.algorithms.quantization.default.algorithm:Computing statistics finished
INFO:openvino.tools.pot.algorithms.quantization.default.algorithm:Start computing statistics for algorithms : MinMaxQuantization,FastBiasCorrection
INFO:openvino.tools.pot.algorithms.quantization.default.algorithm:Computing statistics finished
INFO:openvino.tools.pot.pipeline.pipeline:Finished: DefaultQuantization
===========================================================================
INFO:openvino.tools.pot.pipeline.pipeline:Evaluation of generated model
INFO:openvino.tools.pot.engines.ac_engine:Start inference on the whole dataset
Total dataset size: 1019
1000 / 1019 processed in 10.756s
1019 objects processed in 10.959 seconds
INFO:openvino.tools.pot.engines.ac_engine:Inference finished
INFO:openvino.tools.pot.app.run:accuracy@top1 : 0.009813542688910697
INFO:openvino.tools.pot.app.run:accuracy@top5 : 0.05103042198233562
```
生成的模型在<./results\flower_clas_DefaultQuantization\2022-04-27_14-25-06>路径下。
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