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pip3 install -i https://mirrors.aliyun.com/pypi/simple tensorflow
pip3 install -i https://pypi.tuna.tsinghua.edu.cn/simple tensorflow

Install OpenCV

Opencv windows install package page: https://opencv.org/releases/, the download link: https://nchc.dl.sourceforge.net/project/opencvlibrary/4.3.0/opencv-4.3.0-vc14_vc15.exe

click the opencv-4.3.0-vc14_vc15.exe the file , you shoule select the install path . I select the install path is d:\temp, so the opencv install the d:\ temp\opencv.

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Trian the model

The opencv set the environment variables script is the : setup_vars_opencv4.cmd

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At first, you must execute the script for setup the opencv environment variables,

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you can download the attachment file, for train the model,

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the train.py set up the 5 types of the gestures ,”0”, “1”, “2“, “3“, “4”, 500 pictures of data collected in each type. Hand.h5 file (tensorflow model file) and hand.tflite(tensorflow lite) will be created in the current directory。you press the 'Space' key to start the train .

SP7021 install the Tensorflow-lite and python opencv

Install the python3-opencv

pi@raspberrypi:~$ sudo apt install pyhton3-opencv

Install the tensorflow lite

pi@raspberrypi:~$ pip3 install https://dl.google.com/coral/python/tflite_runtime-2.1.0.post1-cp37-cp37m-linux_armv7l.whl

Insert the USB camera and download the attachment and copy the model file trained by tensorflow. Put these two files together and execute test.py.