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254 lines
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254 lines
17 KiB
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<!-- Generated by javadoc (17) on Wed Jul 02 13:16:04 UTC 2025 -->
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<title>BOWTrainer (OpenCV 4.12.0 Java documentation)</title>
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<meta name="description" content="declaration: package: org.opencv.features2d, class: BOWTrainer">
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<li>Constr | </li>
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<li><a href="#method-summary">Method</a></li>
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<li>Detail: </li>
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<li>Field | </li>
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<div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.opencv.features2d</a></div>
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<h1 title="Class BOWTrainer" class="title">Class BOWTrainer</h1>
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</div>
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<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
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<div class="inheritance">org.opencv.features2d.BOWTrainer</div>
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</div>
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<section class="class-description" id="class-description">
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<dl class="notes">
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<dt>Direct Known Subclasses:</dt>
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<dd><code><a href="BOWKMeansTrainer.html" title="class in org.opencv.features2d">BOWKMeansTrainer</a></code></dd>
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</dl>
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<hr>
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<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">BOWTrainer</span>
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<span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></span></div>
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<div class="block">Abstract base class for training the *bag of visual words* vocabulary from a set of descriptors.
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For details, see, for example, *Visual Categorization with Bags of Keypoints* by Gabriella Csurka,
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Christopher R. Dance, Lixin Fan, Jutta Willamowski, Cedric Bray, 2004. :</div>
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</section>
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<section class="summary">
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<ul class="summary-list">
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<!-- ========== METHOD SUMMARY =========== -->
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<li>
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<section class="method-summary" id="method-summary">
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<h2>Method Summary</h2>
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<div id="method-summary-table">
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<div class="table-tabs" role="tablist" aria-orientation="horizontal"><button id="method-summary-table-tab0" role="tab" aria-selected="true" aria-controls="method-summary-table.tabpanel" tabindex="0" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table', 3)" class="active-table-tab">All Methods</button><button id="method-summary-table-tab1" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab1', 3)" class="table-tab">Static Methods</button><button id="method-summary-table-tab2" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab2', 3)" class="table-tab">Instance Methods</button><button id="method-summary-table-tab4" role="tab" aria-selected="false" aria-controls="method-summary-table.tabpanel" tabindex="-1" onkeydown="switchTab(event)" onclick="show('method-summary-table', 'method-summary-table-tab4', 3)" class="table-tab">Concrete Methods</button></div>
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<div id="method-summary-table.tabpanel" role="tabpanel" aria-labelledby="method-summary-table-tab0">
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<div class="summary-table three-column-summary">
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<div class="table-header col-first">Modifier and Type</div>
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<div class="table-header col-second">Method</div>
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<div class="table-header col-last">Description</div>
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<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="BOWTrainer.html" title="class in org.opencv.features2d">BOWTrainer</a></code></div>
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<div class="col-second even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code><a href="#__fromPtr__(long)" class="member-name-link">__fromPtr__</a><wbr>(long addr)</code></div>
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<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"> </div>
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<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
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<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#add(org.opencv.core.Mat)" class="member-name-link">add</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a> descriptors)</code></div>
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<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
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<div class="block">Adds descriptors to a training set.</div>
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</div>
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<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
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<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#clear()" class="member-name-link">clear</a>()</code></div>
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<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div>
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<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../core/Mat.html" title="class in org.opencv.core">Mat</a></code></div>
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<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#cluster()" class="member-name-link">cluster</a>()</code></div>
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<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div>
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<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../core/Mat.html" title="class in org.opencv.core">Mat</a></code></div>
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<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#cluster(org.opencv.core.Mat)" class="member-name-link">cluster</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a> descriptors)</code></div>
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<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
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<div class="block">Clusters train descriptors.</div>
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</div>
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<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
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<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#descriptorsCount()" class="member-name-link">descriptorsCount</a>()</code></div>
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<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
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<div class="block">Returns the count of all descriptors stored in the training set.</div>
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</div>
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<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>></code></div>
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<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getDescriptors()" class="member-name-link">getDescriptors</a>()</code></div>
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<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
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<div class="block">Returns a training set of descriptors.</div>
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</div>
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<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>long</code></div>
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<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getNativeObjAddr()" class="member-name-link">getNativeObjAddr</a>()</code></div>
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<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> </div>
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</div>
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</div>
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</div>
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<div class="inherited-list">
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<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
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<code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div>
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</section>
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</li>
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</ul>
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</section>
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<section class="details">
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<ul class="details-list">
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<!-- ============ METHOD DETAIL ========== -->
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<li>
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<section class="method-details" id="method-detail">
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<h2>Method Details</h2>
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<ul class="member-list">
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<li>
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<section class="detail" id="getNativeObjAddr()">
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<h3>getNativeObjAddr</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">long</span> <span class="element-name">getNativeObjAddr</span>()</div>
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</section>
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</li>
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<li>
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<section class="detail" id="__fromPtr__(long)">
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<h3>__fromPtr__</h3>
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<div class="member-signature"><span class="modifiers">public static</span> <span class="return-type"><a href="BOWTrainer.html" title="class in org.opencv.features2d">BOWTrainer</a></span> <span class="element-name">__fromPtr__</span><wbr><span class="parameters">(long addr)</span></div>
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</section>
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</li>
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<li>
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<section class="detail" id="add(org.opencv.core.Mat)">
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<h3>add</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">add</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a> descriptors)</span></div>
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<div class="block">Adds descriptors to a training set.</div>
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<dl class="notes">
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<dt>Parameters:</dt>
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<dd><code>descriptors</code> - Descriptors to add to a training set. Each row of the descriptors matrix is a
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descriptor.
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The training set is clustered using clustermethod to construct the vocabulary.</dd>
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</dl>
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</section>
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</li>
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<li>
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<section class="detail" id="getDescriptors()">
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<h3>getDescriptors</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">List</a><<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>></span> <span class="element-name">getDescriptors</span>()</div>
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<div class="block">Returns a training set of descriptors.</div>
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<dl class="notes">
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<dt>Returns:</dt>
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<dd>automatically generated</dd>
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</dl>
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</section>
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</li>
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<li>
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<section class="detail" id="descriptorsCount()">
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<h3>descriptorsCount</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">int</span> <span class="element-name">descriptorsCount</span>()</div>
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<div class="block">Returns the count of all descriptors stored in the training set.</div>
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<dl class="notes">
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<dt>Returns:</dt>
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<dd>automatically generated</dd>
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</dl>
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</section>
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</li>
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<li>
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<section class="detail" id="clear()">
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<h3>clear</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">clear</span>()</div>
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</section>
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</li>
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<li>
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<section class="detail" id="cluster()">
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<h3>cluster</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../core/Mat.html" title="class in org.opencv.core">Mat</a></span> <span class="element-name">cluster</span>()</div>
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</section>
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</li>
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<li>
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<section class="detail" id="cluster(org.opencv.core.Mat)">
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<h3>cluster</h3>
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<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../core/Mat.html" title="class in org.opencv.core">Mat</a></span> <span class="element-name">cluster</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a> descriptors)</span></div>
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<div class="block">Clusters train descriptors.</div>
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<dl class="notes">
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<dt>Parameters:</dt>
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<dd><code>descriptors</code> - Descriptors to cluster. Each row of the descriptors matrix is a descriptor.
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Descriptors are not added to the inner train descriptor set.
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The vocabulary consists of cluster centers. So, this method returns the vocabulary. In the first
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variant of the method, train descriptors stored in the object are clustered. In the second variant,
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input descriptors are clustered.</dd>
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<dt>Returns:</dt>
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<dd>automatically generated</dd>
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</dl>
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</section>
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</li>
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</ul>
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</section>
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</li>
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</ul>
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</section>
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<p class="legal-copy"><small>Generated on 2025-07-02 13:16:04 / OpenCV 4.12.0</small></p>
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