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瑞芯微1808模型转换（onnx$\to$rknn）环境配置

阅读本解决方案前，请读者确保已经根据官方的相关教程【rknn_model_zoo/common/rknn_converter at v1.5.0 · airockchip/rknn_model_zoo (github.com)】完成其他配置文件的修改，以便和您的模型参数相符合，才能转换成功

一、基本配置

1. 创建虚拟环境

   conda create -n rknn python=3.8 -y
   

2. 安装pytorch,该命令读者可在pytorch的历史版本【Previous PyTorch Versions | PyTorch】配置命令中找到

   conda install pytorch==1.10.0 torchvision==0.11.0 torchaudio==0.10.0 cpuonly -c pytorch
   

3. 修改requirements文件，将tensorflow-gpu1.14.0修改为tensorflow-gpu2.2.0

4. 安装对应包

   pip install -r requirements-gpu.txt
   

   或

   pip install -r requirements-cpu.txt
   

5. 定位到rknn_toolkit-1.7.5-cp38-cp38-linux_x86_64.whl所在目录下，执行

   pip install rknn_toolkit-1.7.5-cp38-cp38-linux_x86_64.whl
   

二、解决方案

1. 报错1

   Traceback (most recent call last):File "rknn_convert.py", line 14, in <module>from phase import convert_phase, validate_phaseFile "/17106/Pengcaiping/rknn_model_zoo/common/rknn_converter/phase.py", line 17, in <module>from image_utils.img_preprocesser_tools import Image_preprocessorFile "/17106/Pengcaiping/rknn_model_zoo/common/image_utils/img_preprocesser_tools.py", line 1, in <module>import cv2File "/root/anaconda3/envs/rknn/lib/python3.8/site-packages/cv2/__init__.py", line 181, in <module>bootstrap()File "/root/anaconda3/envs/rknn/lib/python3.8/site-packages/cv2/__init__.py", line 153, in bootstrapnative_module = importlib.import_module("cv2")File "/root/anaconda3/envs/rknn/lib/python3.8/importlib/__init__.py", line 127, in import_modulereturn _bootstrap._gcd_import(name[level:], package, level)
   ImportError: libGL.so.1: cannot open shared object file: No such file or directory
   

   解决方案：

   • 安装opencv-python-headless库

   pip install opencv-python-headless
   

   如果安装过后还是没能解决问题，可能是openGL库确实，先给他装上，下面的命令在非root用户下执行，如果是root用户，则去掉前缀sudo

   sudo apt-get update
   sudo apt-get install libgl1-mesa-glx
   

2. 报错2

   Traceback (most recent call last):File "rknn_convert.py", line 14, in <module>from phase import convert_phase, validate_phaseFile "/17106/Pengcaiping/rknn_model_zoo/common/rknn_converter/phase.py", line 17, in <module>from image_utils.img_preprocesser_tools import Image_preprocessorFile "/17106/Pengcaiping/rknn_model_zoo/common/image_utils/img_preprocesser_tools.py", line 1, in <module>import cv2File "/root/anaconda3/envs/rknn/lib/python3.8/site-packages/cv2/__init__.py", line 181, in <module>bootstrap()File "/root/anaconda3/envs/rknn/lib/python3.8/site-packages/cv2/__init__.py", line 175, in bootstrapif __load_extra_py_code_for_module("cv2", submodule, DEBUG):File "/root/anaconda3/envs/rknn/lib/python3.8/site-packages/cv2/__init__.py", line 28, in __load_extra_py_code_for_modulepy_module = importlib.import_module(module_name)File "/root/anaconda3/envs/rknn/lib/python3.8/importlib/__init__.py", line 127, in import_modulereturn _bootstrap._gcd_import(name[level:], package, level)File "/root/anaconda3/envs/rknn/lib/python3.8/site-packages/cv2/mat_wrapper/__init__.py", line 39, in <module>cv._registerMatType(Mat)
   AttributeError: partially initialized module 'cv2' has no attribute '_registerMatType' (most likely due to a circular import)

   解决方案

   卸载该库

   pip uninstall opencv-python
   

   重新安装该库

   pip install opencv-python
   

   如果还是不行，请再次卸载，重新安装其扩展版本

   pip install opencv-contrib-python
   

3. 报错3

   Collecting opencv-pythonUsing cached opencv_python-4.9.0.80-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl.metadata (20 kB)
   Requirement already satisfied: numpy>=1.17.0 in /root/anaconda3/envs/rknn/lib/python3.8/site-packages (from opencv-python) (1.19.5)
   WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ReadTimeoutError("HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out. (read timeout=15)")': /packages/d9/64/7fdfb9386511cd6805451e012c537073a79a958a58795c4e602e538c388c/opencv_python-4.9.0.80-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
   WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'ReadTimeoutError("HTTPSConnectionPool(host='files.pythonhosted.org', port=443): Read timed out. (read timeout=15)")': /packages/d9/64/7fdfb9386511cd6805451e012c537073a79a958a58795c4e602e538c388c/opencv_python-4.9.0.80-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl
   Downloading opencv_python-4.9.0.80-cp37-abi3-manylinux_2_17_x86_64.manylinux2014_x86_64.whl (62.2 MB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 62.2/62.2 MB 17.8 MB/s eta 0:00:00
   Installing collected packages: opencv-python
   ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
   rknn-toolkit 1.7.5 requires opencv-python==4.5.1.48, but you have opencv-python 4.9.0.80 which is incompatible.
   Successfully installed opencv-python-4.9.0.80
   WARNING: Running pip as the 'root' user can result in broken permissions and conflicting behaviour with the system package manager. It is recommended to use a virtual environment instead: https://pip.pypa.io/warnings/venv
   

   根据上述报错信息，是我们重新安装opencv版本与rknn-toolkit工具包不兼容，此时再次卸载opencv-python包，安装新的包，此时我们指定rknn-toolkit工具包要求的版本。

   pip install opencv-python==4.5.1.48
   

   具体安装哪个版本，以你的控制台报错信息提示为主。

三、祝贺

如果最后执行命令后出现了如下信息行

---> Export RKNN model
Convert Done! outpath: ./model_cvt/RK1808_3399pro/best_RK1808_3399pro_u8.rknn

那么要恭喜，此时模型转换成功。

四、注意事项

1. 时过境迁，当读者你看到此解决方案时，可能距离作者收笔此文相去已久，若未能解决你的问题，作者深感抱歉。当然，以上大部分问题我想，读者可以举一反三，完成符合技术标准的配置。