从Python virtualenv运行OpenCV

Question

我正在尝试在我的Ubuntu Server 12.04上的virtualenv中安装OpenCV.我找到了一个讨论这个问题的线程,但设法从中提取没有信息.

我尝试使用pip install pyopencv但失败了.

...
package/extras/core/ndarray.cpp:598:1:   instantiated from here

package/extras/core/ndarray.cpp:546:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘Py_intptr_t {aka long int}’ [-Wformat]

package/extras/core/ndarray.cpp: In function ‘boost::python::api::object sdcpp::from_ndarray_impl(const sdcpp::ndarray&) [with T = cv::Scalar_<double>]’:

package/extras/core/ndarray.cpp:601:1:   instantiated from here

package/extras/core/ndarray.cpp:546:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘Py_intptr_t {aka long int}’ [-Wformat]

package/extras/core/ndarray.cpp: In function ‘boost::python::api::object sdcpp::from_ndarray_impl(const sdcpp::ndarray&) [with T = cv::Range]’:

package/extras/core/ndarray.cpp:604:1:   instantiated from here

package/extras/core/ndarray.cpp:546:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘Py_intptr_t {aka long int}’ [-Wformat]

error: command 'gcc' failed with exit status 1

此错误仅在我第二次运行时发生pip install.如果我删除了正在删除的build/文件夹,我会收到此错误.

-- Configuring incomplete, errors occurred!

Configuring PyOpenCV via CMake...

Error: error occurred while running CMake to configure PyOpenCV.

You may want to manually configure PyOpenCV by running cmake's tools:

    mkdir build

    cd build

    cmake-gui ..    OR    cmake ..

    cd ..

----------------------------------------
Command python setup.py egg_info failed with error code 255

我至少安装了以下apt包.

build-essential
uuid-dev
python-dev
python-pip
libpq-dev
cmake
libboost-dev
libcv-dev
libcvaux-dev
libboost-python-dev
libboost1.48-dev

如何在virtualenv中安装OpenCV？

Answer 1

解雇了virtualenv并遵循本指南:http://www.samontab.com/web/2011/06/installing-opencv-2-2-in-ubuntu-11-04/,直到操作和复制cv共享对象.相反,我将cv.so(从我的OpenCV-2.2.0/lib目录)复制到我的virtualenv site-packages(例如env/lib/python2.7/site-packages /).一旦cv.so在我的环境中,我就能在python中导入cv.

Answer 2

这是最干净的方法,使用pyenv和virtualenv插件.

使用共享库支持安装Python(因此我们在Mac OS X上获得libpython2.7.dylib或在Linux上获得libpython2.7.so).

env PYTHON_CONFIGURE_OPTS="--enable-shared" pyenv install -v 2.7.6

根据我们刚刚安装的python版本创建virtualenv.

pyenv virtualenv 2.7.6 myvirtualenv

激活virtualenv.

pyenv shell myvirtualenv
pyenv rehash

安装numpy.否则opencv将无法正确链接到Python.

pip install numpy

设置python安装的前缀.

PREFIX_MAIN=`pyenv virtualenv-prefix`

设置环境的前缀.(原文如此!这些pyenv命令的名称有点欺骗!)

PREFIX=`pyenv prefix`

现在配置并安装opencv.请注意,opencv二进制文件和包将安装在virtualenv中,同时使用动态库和Python安装包含.

cd openCV2.4
mkdir release
cd release
cmake -D CMAKE_BUILD_TYPE=RELEASE -D CMAKE_INSTALL_PREFIX="$PREFIX" -DPYTHON_EXECUTABLE="$PREFIX"/bin/python2.7 -DPYTHON_LIBRARY="$PREFIX_MAIN"/lib/libpython2.7.so -DPYTHON_INCLUDE_DIR="$PREFIX_MAIN"/include/python2.7 -DPYTHON_PACKAGES_PATH="$PREFIX"/lib/python2.7/site-packages/ ..
make install

(在OSX上,将libpython2.7.so替换为libpython2.7.dylib.)