open cv 설치 하기 for libcamera

# open cv 설치 하기

https://qengineering.eu/install-opencv-4.5-on-raspberry-pi-4.html

 

1.     EEPROM 업데이트

# to get the current status

$ sudo rpi-eeprom-update

# if needed, to update the firmware

$ sudo rpi-eeprom-update -a

$ sudo reboot

 

2.     버전 확인

$ uname –a   # 결과가 ‘aarch64’ 이면 64bit OS , ‘armv7l’ 이면 32bit OS

 

 

 

 

3.     Swap memory

  : 2048 -> 4096  메모리변경   /etc/dphys-swapfile 은 변경하지 말 것. 데스크탑 동작 x

 

 

# edit the swap configuration

$ sudo nano /sbin/dphys-swapfile

$ sudo nano /etc/dphys-swapfile

# reboot

$ sudo reboot

 

# check your memory first
$ free -m
# you need at least a total of 6.5 GB!
# if not, enlarge your swap space as explained in the guide
$ wget https://github.com/Qengineering/Install-OpenCV-Raspberry-Pi-32-bits/raw/main/OpenCV-4-5-5.sh
$ sudo chmod 755 ./OpenCV-4-5-5.sh
$ ./OpenCV-4-5-5.sh