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<div class="subTitle">org.opencv.video</div>
<h2 title="Class BackgroundSubtractor" class="title">Class BackgroundSubtractor</h2>
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<ul class="inheritance">
<li>java.lang.Object</li>
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<li><a href="../../../org/opencv/core/Algorithm.html" title="class in org.opencv.core">org.opencv.core.Algorithm</a></li>
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<li>org.opencv.video.BackgroundSubtractor</li>
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<dt>Direct Known Subclasses:</dt>
<dd><a href="../../../org/opencv/video/BackgroundSubtractorKNN.html" title="class in org.opencv.video">BackgroundSubtractorKNN</a>, <a href="../../../org/opencv/video/BackgroundSubtractorMOG2.html" title="class in org.opencv.video">BackgroundSubtractorMOG2</a></dd>
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<pre>public class <span class="typeNameLabel">BackgroundSubtractor</span>
extends <a href="../../../org/opencv/core/Algorithm.html" title="class in org.opencv.core">Algorithm</a></pre>
<div class="block">Base class for background/foreground segmentation. :

 The class is only used to define the common interface for the whole family of background/foreground
 segmentation algorithms.</div>
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<td class="colFirst"><code>static <a href="../../../org/opencv/video/BackgroundSubtractor.html" title="class in org.opencv.video">BackgroundSubtractor</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/video/BackgroundSubtractor.html#Z:Z__fromPtr__-long-">__fromPtr__</a></span>(long&nbsp;addr)</code>&nbsp;</td>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/video/BackgroundSubtractor.html#apply-org.opencv.core.Mat-org.opencv.core.Mat-">apply</a></span>(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;image,
     <a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;fgmask)</code>
<div class="block">Computes a foreground mask.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/video/BackgroundSubtractor.html#apply-org.opencv.core.Mat-org.opencv.core.Mat-double-">apply</a></span>(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;image,
     <a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;fgmask,
     double&nbsp;learningRate)</code>
<div class="block">Computes a foreground mask.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/video/BackgroundSubtractor.html#getBackgroundImage-org.opencv.core.Mat-">getBackgroundImage</a></span>(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;backgroundImage)</code>
<div class="block">Computes a background image.</div>
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<h4>__fromPtr__</h4>
<pre>public static&nbsp;<a href="../../../org/opencv/video/BackgroundSubtractor.html" title="class in org.opencv.video">BackgroundSubtractor</a>&nbsp;__fromPtr__(long&nbsp;addr)</pre>
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<h4>apply</h4>
<pre>public&nbsp;void&nbsp;apply(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;image,
                  <a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;fgmask)</pre>
<div class="block">Computes a foreground mask.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>image</code> - Next video frame.</dd>
<dd><code>fgmask</code> - The output foreground mask as an 8-bit binary image.
     learnt. Negative parameter value makes the algorithm to use some automatically chosen learning
     rate. 0 means that the background model is not updated at all, 1 means that the background model
     is completely reinitialized from the last frame.</dd>
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<h4>apply</h4>
<pre>public&nbsp;void&nbsp;apply(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;image,
                  <a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;fgmask,
                  double&nbsp;learningRate)</pre>
<div class="block">Computes a foreground mask.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>image</code> - Next video frame.</dd>
<dd><code>fgmask</code> - The output foreground mask as an 8-bit binary image.</dd>
<dd><code>learningRate</code> - The value between 0 and 1 that indicates how fast the background model is
     learnt. Negative parameter value makes the algorithm to use some automatically chosen learning
     rate. 0 means that the background model is not updated at all, 1 means that the background model
     is completely reinitialized from the last frame.</dd>
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<h4>getBackgroundImage</h4>
<pre>public&nbsp;void&nbsp;getBackgroundImage(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;backgroundImage)</pre>
<div class="block">Computes a background image.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>backgroundImage</code> - The output background image.

     <b>Note:</b> Sometimes the background image can be very blurry, as it contain the average background
     statistics.</dd>
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<p class="legalCopy"><small>Generated on 2023-06-28 12:47:21 / OpenCV 4.8.0</small></p>
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