树莓派4B Buster上OpenCV跟踪器与OpenVINO、NCS2配置故障求助

在树莓派4B-Buster系统上，需要实现OpenCV跟踪器与已淘汰的Intel NCS2及OpenVINO的结合部署，已知最后支持NCS2的OpenVINO版本为v2020.3。

首次尝试：交叉编译安装OpenCV/OpenCV-contrib 4.5.5 #

验证情况：

$ python3
Python 3.7.3 (default, Oct 31 2022, 14:04:00) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
'4.5.5'
>>> tracker = cv2.TrackerCSRT_create()
>>> 

但测试脚本执行以下代码时出错：

...
import cv2
net = cv2.dnn.readNetFromCaffe(_weights, _model)
net.setPreferableTarget(cv2.dnn.DNN_TARGET_MYRIAD)
...
detections = net.forward()

错误信息：

cv2.error: OpenCV(4.5.5) /home/pi/opencv/modules/dnn/src/dnn.cpp:1414: error: (-215:Assertion failed) preferableBackend != DNN_BACKEND_OPENCV || preferableTarget == DNN_TARGET_CPU || preferableTarget == DNN_TARGET_OPENCL || preferableTarget == DNN_TARGET_OPENCL_FP16 in function 'setUpNet'

二次尝试：安装OpenVINO 2020.3版本 #

配置路径：

$ export PYTHONPATH=/home/pi/Desktop/opencv_install/lib/python2.7/dist-packages/:$PYTHONPATH
$ export PYTHONPATH=/home/pi/Desktop/opencv_install/lib/python3.7/site-packages/:$PYTHONPATH
$ export LD_LIBRARY_PATH=/home/pi/Desktop/opencv_install/lib/:$LD_LIBRARY_PATH

完成NCS2配置：

$ sudo usermod -a -G users "$(whoami)"
$ sh /opt/intel/openvino_2020.3/install_dependencies/install_NCS_udev_rules.sh
$ source /opt/intel/openvino_2020.3/bin/setupvars.sh

验证时发现：

$ python3
Python 3.7.3 (default, Oct 31 2022, 14:04:00) 
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import cv2
>>> cv2.__version__
'4.3.0-openvino-2020.3.0'
>>> tracker = cv2.TrackerCSRT_create()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: module 'cv2' has no attribute 'TrackerCSRT_create'
>>>

运行测试脚本时还出现段错误。目前未修改任何配置脚本，请求解决该问题，让NCS2正常工作，同时能使用OpenCV跟踪器。

内容的提问来源于stack exchange，提问作者Thou Maker