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<h2 title="Class BFMatcher" class="title">Class BFMatcher</h2>
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<pre>public class <span class="typeNameLabel">BFMatcher</span>
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extends <a href="../../../org/opencv/features2d/DescriptorMatcher.html" title="class in org.opencv.features2d">DescriptorMatcher</a></pre>
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<div class="block">Brute-force descriptor matcher.
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For each descriptor in the first set, this matcher finds the closest descriptor in the second set
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by trying each one. This descriptor matcher supports masking permissible matches of descriptor
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sets.</div>
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<h3>Fields inherited from class org.opencv.features2d.<a href="../../../org/opencv/features2d/DescriptorMatcher.html" title="class in org.opencv.features2d">DescriptorMatcher</a></h3>
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<code><a href="../../../org/opencv/features2d/DescriptorMatcher.html#BRUTEFORCE">BRUTEFORCE</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#BRUTEFORCE_HAMMING">BRUTEFORCE_HAMMING</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#BRUTEFORCE_HAMMINGLUT">BRUTEFORCE_HAMMINGLUT</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#BRUTEFORCE_L1">BRUTEFORCE_L1</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#BRUTEFORCE_SL2">BRUTEFORCE_SL2</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#FLANNBASED">FLANNBASED</a></code></li>
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<caption><span>Constructors</span><span class="tabEnd"> </span></caption>
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<th class="colOne" scope="col">Constructor and Description</th>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#BFMatcher--">BFMatcher</a></span>()</code>
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<div class="block">Brute-force matcher constructor (obsolete).</div>
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</td>
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<tr class="rowColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#BFMatcher-int-">BFMatcher</a></span>(int normType)</code>
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<div class="block">Brute-force matcher constructor (obsolete).</div>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#BFMatcher-int-boolean-">BFMatcher</a></span>(int normType,
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boolean crossCheck)</code>
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<div class="block">Brute-force matcher constructor (obsolete).</div>
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<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption>
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<td class="colFirst"><code>static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#Z:Z__fromPtr__-long-">__fromPtr__</a></span>(long addr)</code> </td>
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<td class="colFirst"><code>static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#create--">create</a></span>()</code>
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<div class="block">Brute-force matcher create method.</div>
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<td class="colFirst"><code>static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#create-int-">create</a></span>(int normType)</code>
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<div class="block">Brute-force matcher create method.</div>
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<tr id="i3" class="rowColor">
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<td class="colFirst"><code>static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/features2d/BFMatcher.html#create-int-boolean-">create</a></span>(int normType,
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boolean crossCheck)</code>
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<div class="block">Brute-force matcher create method.</div>
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<h3>Methods inherited from class org.opencv.features2d.<a href="../../../org/opencv/features2d/DescriptorMatcher.html" title="class in org.opencv.features2d">DescriptorMatcher</a></h3>
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<code><a href="../../../org/opencv/features2d/DescriptorMatcher.html#add-java.util.List-">add</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#clear--">clear</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#clone--">clone</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#clone-boolean-">clone</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#create-java.lang.String-">create</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#empty--">empty</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#getTrainDescriptors--">getTrainDescriptors</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#isMaskSupported--">isMaskSupported</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#knnMatch-org.opencv.core.Mat-java.util.List-int-">knnMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#knnMatch-org.opencv.core.Mat-java.util.List-int-java.util.List-">knnMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#knnMatch-org.opencv.core.Mat-java.util.List-int-java.util.List-boolean-">knnMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#knnMatch-org.opencv.core.Mat-org.opencv.core.Mat-java.util.List-int-">knnMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#knnMatch-org.opencv.core.Mat-org.opencv.core.Mat-java.util.List-int-org.opencv.core.Mat-">knnMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#knnMatch-org.opencv.core.Mat-org.opencv.core.Mat-java.util.List-int-org.opencv.core.Mat-boolean-">knnMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#match-org.opencv.core.Mat-org.opencv.core.Mat-org.opencv.core.MatOfDMatch-">match</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#match-org.opencv.core.Mat-org.opencv.core.Mat-org.opencv.core.MatOfDMatch-org.opencv.core.Mat-">match</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#match-org.opencv.core.Mat-org.opencv.core.MatOfDMatch-">match</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#match-org.opencv.core.Mat-org.opencv.core.MatOfDMatch-java.util.List-">match</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#radiusMatch-org.opencv.core.Mat-java.util.List-float-">radiusMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#radiusMatch-org.opencv.core.Mat-java.util.List-float-java.util.List-">radiusMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#radiusMatch-org.opencv.core.Mat-java.util.List-float-java.util.List-boolean-">radiusMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#radiusMatch-org.opencv.core.Mat-org.opencv.core.Mat-java.util.List-float-">radiusMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#radiusMatch-org.opencv.core.Mat-org.opencv.core.Mat-java.util.List-float-org.opencv.core.Mat-">radiusMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#radiusMatch-org.opencv.core.Mat-org.opencv.core.Mat-java.util.List-float-org.opencv.core.Mat-boolean-">radiusMatch</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#read-java.lang.String-">read</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#train--">train</a>, <a href="../../../org/opencv/features2d/DescriptorMatcher.html#write-java.lang.String-">write</a></code></li>
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<h3>Methods inherited from class org.opencv.core.<a href="../../../org/opencv/core/Algorithm.html" title="class in org.opencv.core">Algorithm</a></h3>
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<code><a href="../../../org/opencv/core/Algorithm.html#getDefaultName--">getDefaultName</a>, <a href="../../../org/opencv/core/Algorithm.html#getNativeObjAddr--">getNativeObjAddr</a>, <a href="../../../org/opencv/core/Algorithm.html#save-java.lang.String-">save</a></code></li>
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<h3>Methods inherited from class java.lang.Object</h3>
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<h4>BFMatcher</h4>
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<pre>public BFMatcher()</pre>
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<div class="block">Brute-force matcher constructor (obsolete). Please use BFMatcher.create()</div>
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<h4>BFMatcher</h4>
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<pre>public BFMatcher(int normType)</pre>
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<div class="block">Brute-force matcher constructor (obsolete). Please use BFMatcher.create()</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>normType</code> - automatically generated</dd>
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<h4>BFMatcher</h4>
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<pre>public BFMatcher(int normType,
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boolean crossCheck)</pre>
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<div class="block">Brute-force matcher constructor (obsolete). Please use BFMatcher.create()</div>
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<dt><span class="paramLabel">Parameters:</span></dt>
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<dd><code>normType</code> - automatically generated</dd>
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<dd><code>crossCheck</code> - automatically generated</dd>
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<h4>__fromPtr__</h4>
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<pre>public static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a> __fromPtr__(long addr)</pre>
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<h4>create</h4>
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<pre>public static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a> create()</pre>
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<div class="block">Brute-force matcher create method.
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preferable choices for SIFT and SURF descriptors, NORM_HAMMING should be used with ORB, BRISK and
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BRIEF, NORM_HAMMING2 should be used with ORB when WTA_K==3 or 4 (see ORB::ORB constructor
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description).
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nearest neighbors for each query descriptor. If crossCheck==true, then the knnMatch() method with
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k=1 will only return pairs (i,j) such that for i-th query descriptor the j-th descriptor in the
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matcher's collection is the nearest and vice versa, i.e. the BFMatcher will only return consistent
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pairs. Such technique usually produces best results with minimal number of outliers when there are
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enough matches. This is alternative to the ratio test, used by D. Lowe in SIFT paper.</div>
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<dl>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>automatically generated</dd>
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<a name="create-int-">
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<h4>create</h4>
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<pre>public static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a> create(int normType)</pre>
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<div class="block">Brute-force matcher create method.</div>
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
|
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<dd><code>normType</code> - One of NORM_L1, NORM_L2, NORM_HAMMING, NORM_HAMMING2. L1 and L2 norms are
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preferable choices for SIFT and SURF descriptors, NORM_HAMMING should be used with ORB, BRISK and
|
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BRIEF, NORM_HAMMING2 should be used with ORB when WTA_K==3 or 4 (see ORB::ORB constructor
|
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description).
|
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nearest neighbors for each query descriptor. If crossCheck==true, then the knnMatch() method with
|
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k=1 will only return pairs (i,j) such that for i-th query descriptor the j-th descriptor in the
|
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matcher's collection is the nearest and vice versa, i.e. the BFMatcher will only return consistent
|
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pairs. Such technique usually produces best results with minimal number of outliers when there are
|
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enough matches. This is alternative to the ratio test, used by D. Lowe in SIFT paper.</dd>
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>automatically generated</dd>
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</dl>
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</li>
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</ul>
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<a name="create-int-boolean-">
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<h4>create</h4>
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<pre>public static <a href="../../../org/opencv/features2d/BFMatcher.html" title="class in org.opencv.features2d">BFMatcher</a> create(int normType,
|
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boolean crossCheck)</pre>
|
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<div class="block">Brute-force matcher create method.</div>
|
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<dl>
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<dt><span class="paramLabel">Parameters:</span></dt>
|
||
|
<dd><code>normType</code> - One of NORM_L1, NORM_L2, NORM_HAMMING, NORM_HAMMING2. L1 and L2 norms are
|
||
|
preferable choices for SIFT and SURF descriptors, NORM_HAMMING should be used with ORB, BRISK and
|
||
|
BRIEF, NORM_HAMMING2 should be used with ORB when WTA_K==3 or 4 (see ORB::ORB constructor
|
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|
description).</dd>
|
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<dd><code>crossCheck</code> - If it is false, this is will be default BFMatcher behaviour when it finds the k
|
||
|
nearest neighbors for each query descriptor. If crossCheck==true, then the knnMatch() method with
|
||
|
k=1 will only return pairs (i,j) such that for i-th query descriptor the j-th descriptor in the
|
||
|
matcher's collection is the nearest and vice versa, i.e. the BFMatcher will only return consistent
|
||
|
pairs. Such technique usually produces best results with minimal number of outliers when there are
|
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|
enough matches. This is alternative to the ratio test, used by D. Lowe in SIFT paper.</dd>
|
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<dt><span class="returnLabel">Returns:</span></dt>
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<dd>automatically generated</dd>
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</dl>
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</li>
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</ul>
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</li>
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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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