Databases
StackOverflow2013
Postsdbo
POUsing Eigen Library with OpenCV 2.3.1
Body
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POUsing Eigen Library with OpenCV 2.3.1
    text
    copied!<p>I have trouble in using <strong>Eigen3</strong> Library along with <strong>OpenCV</strong> application in <strong>C++</strong>. I have installed Eigen3 library on my Ubuntu using the following command:</p> <pre><code>sudo apt-get install libeigen3-dev </code></pre> <p>I am able to compile and use <strong>sample Eigen3 applications</strong> (Eigen3 library is installed and it works) when I use the following command to compile.</p> <pre><code>g++ -I/usr/include/eigen3 Eig.cpp -o Eig </code></pre> <p>I want to use the installed Eigen library with OpenCV.</p> <p>I compiled OpenCV source with following flags:</p> <pre><code>cmake -D WITH_TBB=ON -D BUILD_NEW_PYTHON_SUPPORT=ON -D WITH_V4L=OFF -D INSTALL_C_EXAMPLES=ON -D INSTALL_PYTHON_EXAMPLES=ON -D BUILD_EXAMPLES=ON USE_EIGEN=/usr/include/eigen3 .. </code></pre> <p>My OpenCV code includes the following headers and namespace:</p> <pre><code>#include &lt;opencv2/core/core.hpp&gt; #include &lt;opencv2/imgproc/imgproc.hpp&gt; #include &lt;opencv2/highgui/highgui.hpp&gt; #include &lt;assert.h&gt; #include &lt;opencv2/core/eigen.hpp&gt; using namespace cv; using namespace std; using namespace Eigen; </code></pre> <p><strong>However, when I normally compile OpenCV application, my compiler gives me the following error:</strong></p> <pre><code>In file included from Read.cpp:6: /usr/local/include/opencv2/core/eigen.hpp:54: error: expected ‘,’ or ‘...’ before ‘::’ token /usr/local/include/opencv2/core/eigen.hpp: In function ‘void cv::eigen2cv(int)’: /usr/local/include/opencv2/core/eigen.hpp:56: error: ‘src’ was not declared in this scope /usr/local/include/opencv2/core/eigen.hpp:56: error: ‘Eigen’ is not a class or namespace /usr/local/include/opencv2/core/eigen.hpp:60: error: ‘dst’ was not declared in this scope /usr/local/include/opencv2/core/eigen.hpp:66: error: ‘dst’ was not declared in this scope </code></pre> <p>How do I solve this problem?</p>
 

Querying!

 
Guidance
An individual column

Larger individual text columns get their own page to allow for proper reading.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload