openCV 程序编译错误“libopencv_core.so.2.4: cannot ope-C/C++问题

openCV program compile error quot;libopencv_core.so.2.4: cannot open shared object file: No such file or directoryquot; in ubuntu 12.04(openCV 程序编译错误“libopencv_core.so.2.4: cannot open shared object file: No such file or directory在 Ubuntu 12.04)

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问题描述

我在 ubuntu 12.04 中编译并安装了 openCV 2.4.2.在 /usr/local/include 下，我可以看到目录 /usr/local/opencv 和 /usr/local/opencv2.

I compiled and installed openCV 2.4.2 in ubuntu 12.04. Under /usr/local/include I can see the directories /usr/local/opencv and /usr/local/opencv2.

这是我写的代码:

#include <cv.h>
#include <highgui.h>
#include <iostream>
using namespace cv;
using namespace std;
int main(int argc,char **argv)
{
   Mat image;
   image = imread(argv[1],1);

   if(argc != 2 || !image.data)
   {
       cout << "No image data
";
       return -1;
   }

   namedWindow("Display Image",CV_WINDOW_AUTOSIZE);
   imshow("Display Image",image);
   waitKey(0);
   return 0;
}

我使用这个命令行编译它:

I compiled it using this command line:

g++ DisplayImage.cpp -o DisplayImage `pkg-config opencv --cflags --libs`

没有编译时错误，但是当我尝试使用 /DisplayImage code.png 运行生成的二进制文件时，我收到以下错误消息:

There were no compile time errors, however when I try to run the resulting binary with /DisplayImage code.png I get the following error message:

./DisplayImage: error while loading shared libraries: libopencv_core.so.2.4: cannot open shared object file: No such file or directory

推荐答案

您没有将共享库放在加载程序可以找到的位置.查看 /usr/local/opencv 和 /usr/local/opencv2 文件夹，看看它们是否包含任何共享库(以 lib<开头的文件)/code> 并且通常以 .so 结尾).找到它们后，创建一个名为 /etc/ld.so.conf.d/opencv.conf 的文件，并将存储库的文件夹的路径写入其中，每行一个.


You haven't put the shared library in a location where the loader can find it.  look inside the /usr/local/opencv and /usr/local/opencv2 folders and see if either of them contains any shared libraries (files beginning in lib and usually ending in .so).  when you find them, create a file called /etc/ld.so.conf.d/opencv.conf and write to it the paths to the folders where the libraries are stored, one per line. 
例如，如果库存储在 /usr/local/opencv/libopencv_core.so.2.4 下，那么我会将其写入我的 opencv.conf 文件:
for example, if the libraries were stored under /usr/local/opencv/libopencv_core.so.2.4 then I would write this to my opencv.conf file:
/usr/local/opencv/

然后运行
sudo ldconfig -v

如果找不到库，请尝试运行
If you can't find the libraries, try running
sudo updatedb && locate libopencv_core.so.2.4

在一个外壳中.如果您在编译 OpenCV 后重新启动，则不需要运行 updatedb.
in a shell.  You don't need to run updatedb if you've rebooted since compiling OpenCV.
参考文献:
关于 Linux 上的共享库:http://www.eyrie.org/~eagle/notes/rpath.html
About shared libraries on Linux: http://www.eyrie.org/~eagle/notes/rpath.html
关于添加 OpenCV 共享库:http://opencv.willowgarage.com/wiki/InstallGuide_Linux
About adding the OpenCV shared libraries: http://opencv.willowgarage.com/wiki/InstallGuide_Linux

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