openCV程序编译错误“libopencv_core.so.2.4：无法打开共享对象文件：无此类文件或目录”在ubuntu 12.04 [英] openCV program compile error "libopencv_core.so.2.4: cannot open shared object file: No such file or directory" in ubuntu 12.04

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 / 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\n";
       return -1;
   }

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

使用此命令行编译它：

I compiled it using this command line:

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

没有编译时错误，但是当我尝试运行生成的二进制 / DisplayImage code.png I得到以下错误消息：

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

将共享库放在加载器可以找到它的位置。查看 / usr / local / opencv 和 / usr / local / opencv2 文件夹中是否包含任何共享库（以 lib 开头，通常以 .so 结尾的文件）。当您找到它们时，创建一个名为 /etc/ld.so.conf.d/opencv.conf 的文件，并向其中写入存储库文件夹的路径，每行一个。然后运行

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. Then run

sudo ldconfig -v

例如，如果库存储在 /usr/local/opencv/libopencv_core.so.2.4 下，那么我会将它写入我的 opencv.conf 档案：

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/

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

。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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