【发布时间】：2018-08-16 03:11:38
【问题描述】：
OpenCV 论坛告诉我我的问题与 Linux 相关，而不是 OpenCV，因此我在这里问。
我有import cv2 错误，请参阅下面的描述：
cv2.so 在路径下：
/usr/local/lib/python2.7/dist-packages/cv2.so
/usr/local/lib/python3.5/dist-packages/cv2.so
我不知道为什么我在每个python版本下都有cv2.so，我用python3构建opencv
我添加到~/.bashrc 文件中：
export PYTHONPATH=/usr/local/lib/python3.5/dist-packages:$PYTHONPATH
但是，当我在python3运行时：
import cv2
它给了我这个信息：
Traceback (most recent call last):File "<stdin>", line 1, in <module>ImportError: libopencv_hdf.so.3.4: cannot open shared object file: No such file or directory
我该如何解决这个问题？谢谢。
环境：
Ubuntu 16.04
OpenCV 3.4.0 build with `contrib`, `python3`, `python3-numpy`.
构建OpenCV3.4.0时的代码
PS：我已经安装了两次 OpenCV3。如果您需要我的第一次 CMake 命令，请关注link
我使用ldd检查共享依赖发现了一个问题：
ldd /usr/local/lib/python3.5/dist-packages/cv2.so
linux-vdso.so.1 => (0x00007fffacda1000)
libopencv_hdf.so.3.4 => not found
libopencv_reg.so.3.4 => not found
libopencv_surface_matching.so.3.4 => not found
libopencv_xphoto.so.3.4 => not found
libopencv_freetype.so.3.4 => not found
libopencv_fuzzy.so.3.4 => not found
libopencv_img_hash.so.3.4 => not found
libopencv_bioinspired.so.3.4 => not found
libopencv_saliency.so.3.4 => not found
libopencv_ccalib.so.3.4 => not found
libopencv_rgbd.so.3.4 => not found
libopencv_structured_light.so.3.4 => not found
libopencv_aruco.so.3.4 => not found
libopencv_bgsegm.so.3.4 => not found
libopencv_face.so.3.4 => not found
libopencv_optflow.so.3.4 => not found
libopencv_stitching.so.3.4 => not found
libopencv_objdetect.so.3.4 => not found
libopencv_photo.so.3.4 => not found
libopencv_tracking.so.3.4 => not found
libopencv_plot.so.3.4 => not found
libopencv_text.so.3.4 => not found
libopencv_dnn.so.3.4 => not found
libopencv_ximgproc.so.3.4 => not found
libopencv_xfeatures2d.so.3.4 => not found
libopencv_ml.so.3.4 => not found
libopencv_shape.so.3.4 => not found
libopencv_video.so.3.4 => not found
libopencv_calib3d.so.3.4 => not found
libopencv_features2d.so.3.4 => not found
libopencv_flann.so.3.4 => not found
libopencv_highgui.so.3.4 => not found
libopencv_videoio.so.3.4 => not found
libopencv_imgcodecs.so.3.4 => not found
libopencv_imgproc.so.3.4 => not found
libopencv_core.so.3.4 => not found
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007ff9d06b2000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007ff9d03a9000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007ff9d0193000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007ff9cfdc9000)
/lib64/ld-linux-x86-64.so.2 (0x00007ff9d10cd000)
谁能给出非常详细的说明来解决这个问题？
更新：
将 ...gitclone.../opencv/build/lib 添加到 $LD_LIBRARY_PATH，并导入 cv2，它给出了这个：
Traceback (most recent call last):File "<stdin>", line 1, in <module>ImportError: /usr/local/lib/python3.5/dist-packages/cv2.so: undefined symbol: _ZTIN2cv3dnn19experimental_dnn_v35LayerE
【问题讨论】：
-
问题是我第二次安装OpenCV的时候，其实是安装了opencv2，而不是opencv3。解决方法：检查是否安装了所有依赖，重新安装OpenCV3。
标签： ubuntu-16.04 opencv3.0 ldd