Follow this article to carry out the detailed process of installing opencv-python on Raspberry Pi 4b.
Method 1: Compile and install, which will encounter many problems. I have installed and passed it once before, but after the python version became higher, I encountered many problems. There is currently no solution, and a solution is given for reference.
The first problem encountered when configuring cmake in 4.
This code will display the following error:
Solution: (Add two .. at the end)
cmake -D CMAKE_BUILD_TYPE=RELEASE \ -D CMAKE_INSTALL_PREFIX=/usr/local \ -D INSTALL_C_EXAMPLES=ON \ -D INSTALL_PYTHON_EXAMPLES=ON \ -D OPENCV_EXTRA_MODULES_PATH=/home/astray/opencv_contrib-4.1.0/modules \#This line needs to be modified according to the path of your own installation -D BUILD_EXAMPLES=ON \ -D WITH_LIBV4L=ON \ -D PYTHON3_EXECUTABLE=/usr/bin/python3.7 \ -D PYTHON_INCLUDE_DIR=/usr/include/python3.7 \ -D PYTHON_LIBRARY=/usr/lib/arm-linux-gnueabihf/libpython3.7m.so \ -D PYTHON3_NUMPY_INCLUDE_DIRS=/usr/lib/python3/dist-packages/numpy/core/include \ .. ####These two points are crucial! ! ! !
You can continue after that, and this is the second problem you encountered.
CMake Error at cmake/OpenCVCompilerOptions.cmake:477 (else):
Flow control statements are not properly nested.
Call Stack (most recent call first):
CMakeLists.txt:692 (include)
Solution: Refer to this article https://blog.csdn.net/qq_57061492/article/details/126171010
Open cmake/OpenCVCompilerOptimizations.cmake in the opencv folder (remember sudo), find line 477 and comment out that section of code.
If the configuration is successful, it will display:
Continue to make, and the third problem occurs:
c++: error: unrecognized command-line option –param=ipcp-unit-growth=100000’; did you mean –param=ipa-cp-unit-growth=’?
Solution: Refer to https://blog.csdn.net/jiugeshao/article/details/121522829
Modify the files in the prompt directory and replace ‘ipcp-unit-growth’ with ‘ipa-cp-unit-growth’
Subsequently, when compiling the old version of opencv with the new version of ffmeg/libav, errors occurred in which many functions were removed and modified. It was too troublesome to modify, so I gave up. . .
Method 2: (Finally completed the recording installation process on 2023.10.16)
For the problem that the Raspberry Pi terminal cannot directly pip install
Create a virtual environment
python3 -m venv test_env source ./test_env/bin/activate //Activate virtual environment
Install dependent libraries: piwheels – opencv-python, https://www.piwheels.org/project/opencv-contrib-python/
sudo pip3 install numpy
sudo apt-get install build-essential git cmake pkg-config -y sudo apt install libwebpmux3 libssl3 libva-drm2 libxfixes3 sudo apt install libcairo-gobject2 libvpx7 libvorbisenc2 libxcb-shm0 libxcb-render0 sudo apt install libwayland-client0 libhwy1 libicu72 sudo apt install libjbig0 libaom3 libwebp7 libxdamage1 libxcb-dri3-0 sudo apt install libsvtav1enc1 libfreetype6 libfribidi0 libsrt1.5-gnutls sudo apt install libgcrypt20 libcairo2 libavutil57 librabbitmq4 libepoxy0 sudo apt install libxrender1 libidn2-0 libsystemd0 libpango-1.0-0 libatk1.0-0 libzvbi0 sudo apt install libcodec2-1.0 libvdpau1 libavformat59 libchromaprint1 libdatrie1 sudo apt install libxcursor1 libatk-bridge2.0-0 libharfbuzz0b libp11-kit0 sudo apt install libxvidcore4 libglib2.0-0 libogg0 libnorm1 sudo apt install libtheora0 libmp3lame0 libx265-199 libsnappy1v5 libgme0 libopenmpt0 sudo apt install libmpg123-0 libgfortran5 libxinerama1 libxdmcp6 sudo apt install libxrandr2 libx11-xcb1 libxext6 libbluray2 libstdc++6 libdrm2 libva2 sudo apt install libatspi2.0-0 libswscale6 ocl-icd-libopencl1 libva-x11-2 sudo apt install libpgm-5.3-0 libxcb1 libk5crypto3 liblz4-1 sudo apt install libnettle8 libmd0 libjpeg62-turbo libgomp1 libsodium23 libwayland-egl1 sudo apt install librist4 libudfread0 libxkbcommon0 libtiff6 libatomic1 sudo apt install libssh-gcrypt-4 libhogweed6 libxml2 libthai0 librsvg2-2 sudo apt install libspeex1 libswresample4 libsoxr0 libfontconfig1 libgdk-pixbuf-2.0-0 sudo apt install libmount1 libffi8 libtasn1-6 libx264-164 libkrb5-3 libzmq5 libzstd1 sudo apt install libxcomposite1 libgnutls30 libpixman-1-0 libgraphite2-3 libgtk-3-0 sudo apt install libwayland-cursor0 libshine3 libtwolame0 sudo apt install libpng16-16 libgssapi-krb5-2 libdav1d6 libgmp10 sudo apt install libpangocairo-1.0-0 libpcre2-8-0 libgsm1 libavcodec59 libxau6 sudo apt install libvorbisfile3 libjxl0.7 libunistring2 libatlas3-base sudo apt install liblerc4 libopus0 libcjson1 libmbedcrypto7 libbrotli1 libxi6 sudo apt install libpangoft2-1.0-0 liblcms2-2 libblkid1 libdeflate0 sudo apt install libopenjp2-7 libvorbis0a libkrb5support0 librav1e0 libbsd0 libx11-6
Install opencv, opencv-contrib-python
pip3 install opencv-python pip3 install opencv-contrib-python
It takes a long, long time to succeed. (I’m sorry, the installation was successful and I can no longer use the server normally…)
After checking the reason, it was still a version incompatibility issue. The latest version installed was unstable.
Try to downgrade python and follow gpt exactly.
sudo apt-get update sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev \ libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev \ xz-utils tk-dev libffi-dev liblzma-dev python-openssl git
curl https://pyenv.run | bash
export PATH="~/.pyenv/bin:$PATH" eval "$(pyenv init -)" eval "$(pyenv virtualenv-init -)"
source ~/.bashrc
That doesn’t work. . Let me write another article, finally the installation was successful.
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