用于opencv cmake安装的错误python软件包路径 [英] Wrong python packages path for opencv cmake installation

问题描述

我一直在尝试从

I've been trying to follow the opencv installation steps from pyimagesearch.com with virtualenv. Everything works fine except for the packages path: it should be /Users/JLee/Envs/cv/lib/python2.7/site-packages but it's configured as lib/python2.7/site-packages

在Python中，import cv2在全局设置中运行良好，但在'cv'虚拟环境中不起作用.

In Python, import cv2 works well in the global setting but doesn't work in the 'cv' virtual environment.

按照网站上的步骤进行操作时，我首先没有安装virtualenv，然后意识到我没有安装它，所以我后来安装了它，然后再次执行步骤.这可能是个问题吗?

While following the steps from the site, I first proceeded without installing virtualenv, then realized I haven't installed it so I installed it later and followed the steps again. Could this be a problem?

 Python 2:
--     Interpreter:                 /Users/JLee/Envs/cv/bin/python2.7 (ver 2.7.10)
--     Libraries:                   /usr/lib/libpython2.7.dylib (ver 2.7.10)
--     numpy:                       /Users/JLee/Envs/cv/lib/python2.7/site-packages/numpy/core/include (ver 1.11.1)
--     packages path:               lib/python2.7/site-packages

这是cmake配置构建的代码:

This is the code for cmake to configure the build:

cmake -D CMAKE_BUILD_TYPE=RELEASE 
-D CMAKE_INSTALL_PREFIX=/usr/local \ 
-D PYTHON2_PACKAGES_PATH=/Users/JLee/Envs/cv/lib/python2.7/site-packages \ 
-D PYTHON2_LIBRARY=/usr/local/Cellar/python/2.7.11/Frameworks/Python.framework/Versions/2.7/bin \ 
-D PYTHON2_INCLUDE_DIR=/usr/local/Frameworks/Python.framework/Headers \ 
-D INSTALL_C_EXAMPLES=OFF -D INSTALL_PYTHON_EXAMPLES=ON \ -D BUILD_EXAMPLES=ON \ 
-D OPENCV_EXTRA_MODULES_PATH=/Users/JLee/Developer/opencv_project/opencv_contrib/modules ..

谢谢您的帮助！

推荐答案

由于某种原因，CMake似乎没有自动确定虚拟环境的site-packages目录.不过，这不是问题，因为您要做的只是cv2.so文件中的符号链接.

For some reason it looks like CMake didn't automatically determine your site-packages directory for your virtual environment. That's not an issue though, because all you need to do is sym-link in the cv2.so file.

在磁盘上找到您的cv2.so文件(根据您的输出，它似乎在lib/python2.7/site-packages中)，然后符号链接到您的Python虚拟环境site-packages目录中.从那里开始，一切都会按预期进行.

Find your cv2.so file on disk (based on your output, it seems to be in lib/python2.7/site-packages) and then sym-link into your Python virtual environment site-packages directory. From there, everything will work as expected.

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