This is the full setup of OpenCV for the Raspberry Pi 64-bits.
For more information see Q-engineering - Install OpenCV Raspberry Pi
You must have allocated enough memory, otherwise the compilation, unfortunately, crashes after 2 hours at 100%
# check your total memory (RAM + swap) first. You need at least a total of:
# OpenCV 4.5.2 -> 6.5 GB!
# OpenCV 4.5.1 -> 5.5 GB
# OpenCV 4.5.0 -> 5.5 GB
# if not, enlarge your swap space as explained in the guide
$ free -m
$ wget https://github.com/Qengineering/Install-OpenCV-Raspberry-Pi-64-bits/raw/main/OpenCV-4-5-x.sh
$ sudo chmod 755 ./OpenCV-4-5-x.sh
$ ./OpenCV-4-5-x.sh
👉 Don't forget to reset your swap memory afterwards.
If you want to beautify OpenCV with the Qt5 GUI you need to
- $ sudo apt-get install qt5-default
- Set the -D WITH_QT=ON \ (± line 54) in the script
before running the script on your RPi