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<p>If you have an existing OpenCV install, set its path via:</p>
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<pre class="pygments highlight"><code data-lang="bash"><span></span>cmake<span class="tok-w"> </span>..<span class="tok-w"> </span>-DOpenCV_DIR<span class="tok-o">=</span>/.../path/to/OpenCVConfig.cmake</code></pre>
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<h3 id="_run_the_c_demo">Run the C&#43;&#43; demo</h3>
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<p>If you built 