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    <p>I ran into some difficulty as well - the documentation is just slightly out of date. </p> <p>This solution is based on this tutorial: <a href="http://opencv.willowgarage.com/wiki/VisualC%2B%2B_VS2010_CMake" rel="nofollow">http://opencv.willowgarage.com/wiki/VisualC%2B%2B_VS2010_CMake</a></p> <p>Here's the exact steps I took to get an opencv 2.4.2 hello world example working with Visual C++ 2010 Express:</p> <p><strong>Grab the source code</strong></p> <p>Download opencv.</p> <p>Extract opencv to C:\</p> <p><strong>Building the binaries</strong></p> <p>Download cmake. Open the cmake gui..</p> <p>Where is the source code: C:/opencv</p> <p>Where to build the binaries: C:/opencv/build</p> <p>Click Configure - for the generator choose Visual Studio 10 Click Generate.</p> <p>In C:\opencv\build you should now see OpenCV.sln.</p> <p>Open the solution file with VS C++ Express and build it.</p> <p><strong>Setting up the hello world project</strong></p> <p>Create a new project in VS. Choose console application and leave precompiled headers ticked. Right-click on solution file and choose properties.</p> <p>In the VC++ Directories window, add the following:</p> <p>Include Directories: C:\opencv\build\include;C:\opencv\build\include\opencv;C:\opencv\build\include\opencv2</p> <p>Library Directories: C:\opencv\build\lib\Debug</p> <p>Source Directories: C:\opencv\build\include</p> <p>In C++ -> Linker -> Input, add the following to Additional Dependencies:</p> <pre><code>opencv_core242d.lib opencv_highgui242d.lib </code></pre> <p><strong>Hello World Content</strong></p> <p>Change the content as suggested in the tutorial to:</p> <pre><code>#include "stdafx.h" #include &lt;cv.h&gt; #include &lt;cxcore.h&gt; #include &lt;highgui.h&gt; int _tmain(int argc, _TCHAR* argv[]) { IplImage *img = cvLoadImage("funny-pictures-cat-goes-pew.jpg"); cvNamedWindow("Image:",1); cvShowImage("image:",img); cvWaitKey(); cvDestroyWindow("Image:"); cvReleaseImage(&amp;img); return 0; } </code></pre> <p>Place the image (or any image) in your project directory.</p> <p>Now build and hit Debug, and it should work. Hope this helps someone.</p>
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    1. POInstalling openCV 2.4 for C/C++ for Visual Studio
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