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<div class="subTitle">org.opencv.features2d</div>
<h2 title="Class BOWTrainer" class="title">Class BOWTrainer</h2>
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<li>java.lang.Object</li>
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<pre>public class <span class="typeNameLabel">BOWTrainer</span>
extends java.lang.Object</pre>
<div class="block">Abstract base class for training the *bag of visual words* vocabulary from a set of descriptors.
For details, see, for example, *Visual Categorization with Bags of Keypoints* by Gabriella Csurka,
Christopher R. Dance, Lixin Fan, Jutta Willamowski, Cedric Bray, 2004. :</div>
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<td class="colFirst"><code>static <a href="../../../org/opencv/features2d/BOWTrainer.html" title="class in org.opencv.features2d">BOWTrainer</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.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/features2d/BOWTrainer.html#add-org.opencv.core.Mat-">add</a></span>(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;descriptors)</code>
<div class="block">Adds descriptors to a training set.</div>
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<td class="colFirst"><code>void</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.html#clear--">clear</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.html#cluster--">cluster</a></span>()</code>&nbsp;</td>
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<td class="colFirst"><code><a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.html#cluster-org.opencv.core.Mat-">cluster</a></span>(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;descriptors)</code>
<div class="block">Clusters train descriptors.</div>
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<td class="colFirst"><code>int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.html#descriptorsCount--">descriptorsCount</a></span>()</code>
<div class="block">Returns the count of all descriptors stored in the training set.</div>
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<td class="colFirst"><code>java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.html#getDescriptors--">getDescriptors</a></span>()</code>
<div class="block">Returns a training set of descriptors.</div>
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<td class="colFirst"><code>long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BOWTrainer.html#getNativeObjAddr--">getNativeObjAddr</a></span>()</code>&nbsp;</td>
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<h4>__fromPtr__</h4>
<pre>public static&nbsp;<a href="../../../org/opencv/features2d/BOWTrainer.html" title="class in org.opencv.features2d">BOWTrainer</a>&nbsp;__fromPtr__(long&nbsp;addr)</pre>
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<h4>add</h4>
<pre>public&nbsp;void&nbsp;add(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;descriptors)</pre>
<div class="block">Adds descriptors to a training set.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>descriptors</code> - Descriptors to add to a training set. Each row of the descriptors matrix is a
descriptor.
The training set is clustered using clustermethod to construct the vocabulary.</dd>
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<h4>clear</h4>
<pre>public&nbsp;void&nbsp;clear()</pre>
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<h4>cluster</h4>
<pre>public&nbsp;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;cluster()</pre>
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<h4>cluster</h4>
<pre>public&nbsp;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;cluster(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;descriptors)</pre>
<div class="block">Clusters train descriptors.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>descriptors</code> - Descriptors to cluster. Each row of the descriptors matrix is a descriptor.
Descriptors are not added to the inner train descriptor set.
The vocabulary consists of cluster centers. So, this method returns the vocabulary. In the first
variant of the method, train descriptors stored in the object are clustered. In the second variant,
input descriptors are clustered.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
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<pre>public&nbsp;int&nbsp;descriptorsCount()</pre>
<div class="block">Returns the count of all descriptors stored in the training set.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
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<h4>getDescriptors</h4>
<pre>public&nbsp;java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;getDescriptors()</pre>
<div class="block">Returns a training set of descriptors.</div>
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<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
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<h4>getNativeObjAddr</h4>
<pre>public&nbsp;long&nbsp;getNativeObjAddr()</pre>
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<p class="legalCopy"><small>Generated on 2021-12-25 08:13:27 / OpenCV 4.5.5</small></p>
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