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# AdaFace Python部署示例
本目录下提供infer_xxx.py快速完成AdaFace模型在CPU/GPU以及GPU上通过TensorRT加速部署的示例。
在部署前,需确认以下两个步骤
- 1. 软硬件环境满足要求,参考[FastDeploy环境要求](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)
- 2. FastDeploy Python whl包安装参考[FastDeploy Python安装](../../../../../docs/cn/build_and_install/download_prebuilt_libraries.md)
以AdaFace为例子, 提供`infer.py`快速完成AdaFace在CPU/GPU以及GPU上通过TensorRT加速部署的示例。执行如下脚本即可完成
```bash
#下载部署示例代码
git clone https://github.com/PaddlePaddle/FastDeploy.git
cd examples/vision/faceid/adaface/python/
#下载AdaFace模型文件和测试图片
#下载测试图片
wget https://bj.bcebos.com/paddlehub/fastdeploy/rknpu2/face_demo.zip
unzip face_demo.zip
# 如果为Paddle模型运行以下代码
wget https://bj.bcebos.com/paddlehub/fastdeploy/mobilefacenet_adaface.tgz
tar zxvf mobilefacenet_adaface.tgz -C ./
# CPU推理
python infer.py --model mobilefacenet_adaface/mobilefacenet_adaface.pdmodel \
--params_file mobilefacenet_adaface/mobilefacenet_adaface.pdiparams \
--face face_0.jpg \
--face_positive face_1.jpg \
--face_negative face_2.jpg \
--device cpu
# GPU推理
python infer.py --model mobilefacenet_adaface/mobilefacenet_adaface.pdmodel \
--params_file mobilefacenet_adaface/mobilefacenet_adaface.pdiparams \
--face face_0.jpg \
--face_positive face_1.jpg \
--face_negative face_2.jpg \
--device gpu
# GPU上使用TensorRT推理
python infer.py --model mobilefacenet_adaface/mobilefacenet_adaface.pdmodel \
--params_file mobilefacenet_adaface/mobilefacenet_adaface.pdiparams \
--face face_0.jpg \
--face_positive face_1.jpg \
--face_negative face_2.jpg \
--device gpu \
--use_trt True
# 昆仑芯XPU推理
python infer.py --model mobilefacenet_adaface/mobilefacenet_adaface.pdmodel \
--params_file mobilefacenet_adaface/mobilefacenet_adaface.pdiparams \
--face test_lite_focal_arcface_0.JPG \
--face_positive test_lite_focal_arcface_1.JPG \
--face_negative test_lite_focal_arcface_2.JPG \
--device kunlunxin
```
运行完成可视化结果如下图所示
<div width="700">
<img width="220" float="left" src="https://user-images.githubusercontent.com/67993288/184321537-860bf857-0101-4e92-a74c-48e8658d838c.JPG">
<img width="220" float="left" src="https://user-images.githubusercontent.com/67993288/184322004-a551e6e4-6f47-454e-95d6-f8ba2f47b516.JPG">
<img width="220" float="left" src="https://user-images.githubusercontent.com/67993288/184321622-d9a494c3-72f3-47f1-97c5-8a2372de491f.JPG">
</div>
```bash
FaceRecognitionResult: [Dim(512), Min(-0.133213), Max(0.148838), Mean(0.000293)]
FaceRecognitionResult: [Dim(512), Min(-0.102777), Max(0.120130), Mean(0.000615)]
FaceRecognitionResult: [Dim(512), Min(-0.116685), Max(0.142919), Mean(0.001595)]
Cosine 01: 0.7483505506964364
Cosine 02: -0.09605773855893639
```
## AdaFace Python接口
```python
fastdeploy.vision.faceid.AdaFace(model_file, params_file=None, runtime_option=None, model_format=ModelFormat.PADDLE)
```
AdaFace模型加载和初始化其中model_file为导出的ONNX模型格式或PADDLE静态图格式
**参数**
> * **model_file**(str): 模型文件路径
> * **params_file**(str): 参数文件路径当模型格式为ONNX格式时此参数无需设定
> * **runtime_option**(RuntimeOption): 后端推理配置默认为None即采用默认配置
> * **model_format**(ModelFormat): 模型格式默认为PADDLE
### predict函数
> ```python
> AdaFace.predict(image_data)
> ```
>
> 模型预测结口,输入图像直接输出检测结果。
>
> **参数**
>
> > * **image_data**(np.ndarray): 输入数据注意需为HWCBGR格式
> **返回**
>
> > 返回`fastdeploy.vision.FaceRecognitionResult`结构体,结构体说明参考文档[视觉模型预测结果](../../../../../docs/api/vision_results/)
### 类成员属性
#### 预处理参数
用户可按照自己的实际需求,修改下列预处理参数,从而影响最终的推理和部署效果
#### AdaFacePreprocessor的成员变量
以下变量为AdaFacePreprocessor的成员变量
> > * **size**(list[int]): 通过此参数修改预处理过程中resize的大小包含两个整型元素表示[width, height], 默认值为[112, 112]
> > * **alpha**(list[float]): 预处理归一化的alpha值计算公式为`x'=x*alpha+beta`alpha默认为[1. / 127.5, 1.f / 127.5, 1. / 127.5]
> > * **beta**(list[float]): 预处理归一化的beta值计算公式为`x'=x*alpha+beta`beta默认为[-1.f, -1.f, -1.f]
> > * **swap_rb**(bool): 预处理是否将BGR转换成RGB默认True
#### AdaFacePostprocessor的成员变量
以下变量为AdaFacePostprocessor的成员变量
> > * **l2_normalize**(bool): 输出人脸向量之前是否执行l2归一化默认False
## 其它文档
- [AdaFace 模型介绍](..)
- [AdaFace C++部署](../cpp)
- [模型预测结果说明](../../../../../docs/api/vision_results/)
- [如何切换模型推理后端引擎](../../../../../docs/cn/faq/how_to_change_backend.md)