Install Opencv issue

安裝完opencv-contrib-python後 import cv2 時出現:

Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/local/lib/python3.7/site-packages/cv2/__init__.py", line 3, in <module> from .cv2 import * ImportError: libhdf5_serial.so.103: cannot open shared object file: No such file or directory

— — — — — — 解決- — — — — — —

• Step1:

到 cv2 路徑下

>> cd /usr/local/lib/python3.7/site-packages/cv2

找到 cv2.cpython-37m-arm-linux-gnueabihf.so

• Step2:

尋找未安裝的套件

>> ldd cv2.cpython-37m-arm-linux-gnueabihf.so | grep "not found"

Out::

libQtTest.so.4 => not found

• Step3:

安裝 apt-file

>> sudo apt install apt-file

• Step4:

搜尋套件:

>> apt-file search libQtTest.so.4

Out::(冒號前面是套件名稱)

libqt4-test: /usr/lib/arm-linux-gnueabihf/libQtTest.so.4
libqt4-test: /usr/lib/arm-linux-gnueabihf/libQtTest.so.4.8
libqt4-test: /usr/lib/arm-linux-gnueabihf/libQtTest.so.4.8.7

• Step5:

安裝缺少的套件:

>> sudo apt install libqt-4-test

直到所有套件都安裝即可

— — — — — — — — — — — — — — — — — — -

• 若出現:

Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: /usr/local/lib/python3.7/site-packages/cv2/cv2.cpython-37m-arm-linux-gnueabihf.so: undefined symbol: __atomic_fetch_add_8

則可嘗試:

pip install opencv-python==3.4.6.27