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FastDeploy/examples/vision/segmentation/paddleseg/python/README.md
huangjianhui 625845c7d6 Update ppseg with eigen functions (#238)
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Co-authored-by: Jason <jiangjiajun@baidu.com>
2022-09-22 21:21:47 +08:00

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# PaddleSeg Python部署示例
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/environment.md)
- 2. FastDeploy Python whl包安装参考[FastDeploy Python安装](../../../../../docs/quick_start)
本目录下提供`infer.py`快速完成Unet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 FastDeploy/examples/vision/segmentation/paddleseg/python
# 下载Unet模型文件和测试图片
wget https://bj.bcebos.com/paddlehub/fastdeploy/Unet_cityscapes_without_argmax_infer.tgz
tar -xvf Unet_cityscapes_without_argmax_infer.tgz
wget https://paddleseg.bj.bcebos.com/dygraph/demo/cityscapes_demo.png
# CPU推理
python infer.py --model Unet_cityscapes_without_argmax_infer --image cityscapes_demo.png --device cpu
# GPU推理
python infer.py --model Unet_cityscapes_without_argmax_infer --image cityscapes_demo.png --device gpu
# GPU上使用TensorRT推理 注意TensorRT推理第一次运行有序列化模型的操作有一定耗时需要耐心等待
python infer.py --model Unet_cityscapes_without_argmax_infer --image cityscapes_demo.png --device gpu --use_trt True
```
运行完成可视化结果如下图所示
<div align="center">
<img src="https://user-images.githubusercontent.com/16222477/191712880-91ae128d-247a-43e0-b1e3-cafae78431e0.jpg", width=512px, height=256px />
</div>
## PaddleSegModel Python接口
```python
fd.vision.segmentation.PaddleSegModel(model_file, params_file, config_file, runtime_option=None, model_format=ModelFormat.PADDLE)
```
PaddleSeg模型加载和初始化其中model_file, params_file以及config_file为训练模型导出的Paddle inference文件具体请参考其文档说明[模型导出](https://github.com/PaddlePaddle/PaddleSeg/blob/release/2.6/docs/model_export_cn.md)
**参数**
> * **model_file**(str): 模型文件路径
> * **params_file**(str): 参数文件路径
> * **config_file**(str): 推理部署配置文件
> * **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格式
### predict函数
> ```python
> PaddleSegModel.predict(input_image)
> ```
>
> 模型预测结口,输入图像直接输出检测结果。
>
> **参数**
>
> > * **input_image**(np.ndarray): 输入数据注意需为HWCBGR格式
> **返回**
>
> > 返回`fastdeploy.vision.SegmentationResult`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
> > * **is_vertical_screen**(bool): PP-HumanSeg系列模型通过设置此参数为`true`表明输入图片是竖屏即height大于width的图片
#### 后处理参数
> > * **apply_softmax**(bool): 当模型导出时,并未指定`apply_softmax`参数,可通过此设置此参数为`true`将预测的输出分割标签label_map对应的概率结果(score_map)做softmax归一化处理
## 其它文档
- [PaddleSeg 模型介绍](..)
- [PaddleSeg 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/runtime/how_to_change_backend.md)