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<h4>compute</h4>
<pre>public&nbsp;void&nbsp;compute(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
                    <a href="../../../org/opencv/core/MatOfFloat.html" title="class in org.opencv.core">MatOfFloat</a>&nbsp;descriptors,
                    <a href="../../../org/opencv/core/Size.html" tit