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<title>QRCodeDetector (OpenCV 4.12.0 Java documentation)</title>
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<div class="sub-title"><span class="package-label-in-type">Package</span>&nbsp;<a href="package-summary.html">org.opencv.objdetect</a></div>
<h1 title="Class QRCodeDetector" class="title">Class QRCodeDetector</h1>
</div>
<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>
<div class="inheritance"><a href="GraphicalCodeDetector.html" title="class in org.opencv.objdetect">org.opencv.objdetect.GraphicalCodeDetector</a>
<div class="inheritance">org.opencv.objdetect.QRCodeDetector</div>
</div>
</div>
<section class="class-description" id="class-description">
<hr>
<div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">QRCodeDetector</span>
<span class="extends-implements">extends <a href="GraphicalCodeDetector.html" title="class in org.opencv.objdetect">GraphicalCodeDetector</a></span></div>
</section>
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<h2>Constructor Summary</h2>
<div class="caption"><span>Constructors</span></div>
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<div class="table-header col-first">Constructor</div>
<div class="table-header col-last">Description</div>
<div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">QRCodeDetector</a>()</code></div>
<div class="col-last even-row-color">&nbsp;</div>
</div>
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<!-- ========== METHOD SUMMARY =========== -->
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<div class="table-header col-first">Modifier and Type</div>
<div class="table-header col-second">Method</div>
<div class="table-header col-last">Description</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4"><code>static <a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></code></div>
<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&nbsp;addr)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab1 method-summary-table-tab4">&nbsp;</div>
<div class="col-first odd-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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#decodeCurved(org.opencv.core.Mat,org.opencv.core.Mat)" class="member-name-link">decodeCurved</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Decodes QR code on a curved surface in image once it's found by the detect() method.</div>
</div>
<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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#decodeCurved(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)" class="member-name-link">decodeCurved</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;straight_qrcode)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Decodes QR code on a curved surface in image once it's found by the detect() method.</div>
</div>
<div class="col-first odd-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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#detectAndDecodeCurved(org.opencv.core.Mat)" class="member-name-link">detectAndDecodeCurved</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Both detects and decodes QR code on a curved surface</div>
</div>
<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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#detectAndDecodeCurved(org.opencv.core.Mat,org.opencv.core.Mat)" class="member-name-link">detectAndDecodeCurved</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Both detects and decodes QR code on a curved surface</div>
</div>
<div class="col-first odd-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/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#detectAndDecodeCurved(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)" class="member-name-link">detectAndDecodeCurved</a><wbr>(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;straight_qrcode)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Both detects and decodes QR code on a curved surface</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getEncoding()" class="member-name-link">getEncoding</a>()</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call
When REF: decode or REF: detectAndDecode is used, valid value is zero.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>int</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#getEncoding(int)" class="member-name-link">getEncoding</a><wbr>(int&nbsp;codeIdx)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#setEpsX(double)" class="member-name-link">setEpsX</a><wbr>(double&nbsp;epsX)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">sets the epsilon used during the horizontal scan of QR code stop marker detection.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#setEpsY(double)" class="member-name-link">setEpsY</a><wbr>(double&nbsp;epsY)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">sets the epsilon used during the vertical scan of QR code stop marker detection.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#setUseAlignmentMarkers(boolean)" class="member-name-link">setUseAlignmentMarkers</a><wbr>(boolean&nbsp;useAlignmentMarkers)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">use markers to improve the position of the corners of the QR code
alignmentMarkers using by default</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-org.opencv.objdetect.GraphicalCodeDetector">Methods inherited from class&nbsp;org.opencv.objdetect.<a href="GraphicalCodeDetector.html" title="class in org.opencv.objdetect">GraphicalCodeDetector</a></h3>
<code><a href="GraphicalCodeDetector.html#decode(org.opencv.core.Mat,org.opencv.core.Mat)">decode</a>, <a href="GraphicalCodeDetector.html#decode(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)">decode</a>, <a href="GraphicalCodeDetector.html#decodeBytes(org.opencv.core.Mat,org.opencv.core.Mat)">decodeBytes</a>, <a href="GraphicalCodeDetector.html#decodeBytes(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)">decodeBytes</a>, <a href="GraphicalCodeDetector.html#decodeBytesMulti(org.opencv.core.Mat,org.opencv.core.Mat,java.util.List)">decodeBytesMulti</a>, <a href="GraphicalCodeDetector.html#decodeBytesMulti(org.opencv.core.Mat,org.opencv.core.Mat,java.util.List,java.util.List)">decodeBytesMulti</a>, <a href="GraphicalCodeDetector.html#decodeMulti(org.opencv.core.Mat,org.opencv.core.Mat,java.util.List)">decodeMulti</a>, <a href="GraphicalCodeDetector.html#decodeMulti(org.opencv.core.Mat,org.opencv.core.Mat,java.util.List,java.util.List)">decodeMulti</a>, <a href="GraphicalCodeDetector.html#detect(org.opencv.core.Mat,org.opencv.core.Mat)">detect</a>, <a href="GraphicalCodeDetector.html#detectAndDecode(org.opencv.core.Mat)">detectAndDecode</a>, <a href="GraphicalCodeDetector.html#detectAndDecode(org.opencv.core.Mat,org.opencv.core.Mat)">detectAndDecode</a>, <a href="GraphicalCodeDetector.html#detectAndDecode(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)">detectAndDecode</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeBytes(org.opencv.core.Mat)">detectAndDecodeBytes</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeBytes(org.opencv.core.Mat,org.opencv.core.Mat)">detectAndDecodeBytes</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeBytes(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)">detectAndDecodeBytes</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeBytesMulti(org.opencv.core.Mat,java.util.List)">detectAndDecodeBytesMulti</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeBytesMulti(org.opencv.core.Mat,java.util.List,org.opencv.core.Mat)">detectAndDecodeBytesMulti</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeBytesMulti(org.opencv.core.Mat,java.util.List,org.opencv.core.Mat,java.util.List)">detectAndDecodeBytesMulti</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeMulti(org.opencv.core.Mat,java.util.List)">detectAndDecodeMulti</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeMulti(org.opencv.core.Mat,java.util.List,org.opencv.core.Mat)">detectAndDecodeMulti</a>, <a href="GraphicalCodeDetector.html#detectAndDecodeMulti(org.opencv.core.Mat,java.util.List,org.opencv.core.Mat,java.util.List)">detectAndDecodeMulti</a>, <a href="GraphicalCodeDetector.html#detectMulti(org.opencv.core.Mat,org.opencv.core.Mat)">detectMulti</a>, <a href="GraphicalCodeDetector.html#getNativeObjAddr()">getNativeObjAddr</a></code></div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class&nbsp;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>
<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>
</section>
</li>
</ul>
</section>
<section class="details">
<ul class="details-list">
<!-- ========= CONSTRUCTOR DETAIL ======== -->
<li>
<section class="constructor-details" id="constructor-detail">
<h2>Constructor Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="&lt;init&gt;()">
<h3>QRCodeDetector</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="element-name">QRCodeDetector</span>()</div>
</section>
</li>
</ul>
</section>
</li>
<!-- ============ METHOD DETAIL ========== -->
<li>
<section class="method-details" id="method-detail">
<h2>Method Details</h2>
<ul class="member-list">
<li>
<section class="detail" id="__fromPtr__(long)">
<h3>__fromPtr__</h3>
<div class="member-signature"><span class="modifiers">public static</span>&nbsp;<span class="return-type"><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></span>&nbsp;<span class="element-name">__fromPtr__</span><wbr><span class="parameters">(long&nbsp;addr)</span></div>
</section>
</li>
<li>
<section class="detail" id="setEpsX(double)">
<h3>setEpsX</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></span>&nbsp;<span class="element-name">setEpsX</span><wbr><span class="parameters">(double&nbsp;epsX)</span></div>
<div class="block">sets the epsilon used during the horizontal scan of QR code stop marker detection.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>epsX</code> - Epsilon neighborhood, which allows you to determine the horizontal pattern
of the scheme 1:1:3:1:1 according to QR code standard.</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setEpsY(double)">
<h3>setEpsY</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></span>&nbsp;<span class="element-name">setEpsY</span><wbr><span class="parameters">(double&nbsp;epsY)</span></div>
<div class="block">sets the epsilon used during the vertical scan of QR code stop marker detection.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>epsY</code> - Epsilon neighborhood, which allows you to determine the vertical pattern
of the scheme 1:1:3:1:1 according to QR code standard.</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setUseAlignmentMarkers(boolean)">
<h3>setUseAlignmentMarkers</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="QRCodeDetector.html" title="class in org.opencv.objdetect">QRCodeDetector</a></span>&nbsp;<span class="element-name">setUseAlignmentMarkers</span><wbr><span class="parameters">(boolean&nbsp;useAlignmentMarkers)</span></div>
<div class="block">use markers to improve the position of the corners of the QR code
alignmentMarkers using by default</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>useAlignmentMarkers</code> - automatically generated</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="decodeCurved(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)">
<h3>decodeCurved</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">decodeCurved</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;straight_qrcode)</span></div>
<div class="block">Decodes QR code on a curved surface in image once it's found by the detect() method.
Returns UTF8-encoded output string or empty string if the code cannot be decoded.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>img</code> - grayscale or color (BGR) image containing QR code.</dd>
<dd><code>points</code> - Quadrangle vertices found by detect() method (or some other algorithm).</dd>
<dd><code>straight_qrcode</code> - The optional output image containing rectified and binarized QR code</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="decodeCurved(org.opencv.core.Mat,org.opencv.core.Mat)">
<h3>decodeCurved</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">decodeCurved</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points)</span></div>
<div class="block">Decodes QR code on a curved surface in image once it's found by the detect() method.
Returns UTF8-encoded output string or empty string if the code cannot be decoded.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>img</code> - grayscale or color (BGR) image containing QR code.</dd>
<dd><code>points</code> - Quadrangle vertices found by detect() method (or some other algorithm).</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="detectAndDecodeCurved(org.opencv.core.Mat,org.opencv.core.Mat,org.opencv.core.Mat)">
<h3>detectAndDecodeCurved</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">detectAndDecodeCurved</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;straight_qrcode)</span></div>
<div class="block">Both detects and decodes QR code on a curved surface</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>img</code> - grayscale or color (BGR) image containing QR code.</dd>
<dd><code>points</code> - optional output array of vertices of the found QR code quadrangle. Will be empty if not found.</dd>
<dd><code>straight_qrcode</code> - The optional output image containing rectified and binarized QR code</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="detectAndDecodeCurved(org.opencv.core.Mat,org.opencv.core.Mat)">
<h3>detectAndDecodeCurved</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">detectAndDecodeCurved</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;points)</span></div>
<div class="block">Both detects and decodes QR code on a curved surface</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>img</code> - grayscale or color (BGR) image containing QR code.</dd>
<dd><code>points</code> - optional output array of vertices of the found QR code quadrangle. Will be empty if not found.</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="detectAndDecodeCurved(org.opencv.core.Mat)">
<h3>detectAndDecodeCurved</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/String.html" title="class or interface in java.lang" class="external-link">String</a></span>&nbsp;<span class="element-name">detectAndDecodeCurved</span><wbr><span class="parameters">(<a href="../core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img)</span></div>
<div class="block">Both detects and decodes QR code on a curved surface</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>img</code> - grayscale or color (BGR) image containing QR code.</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getEncoding(int)">
<h3>getEncoding</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">getEncoding</span><wbr><span class="parameters">(int&nbsp;codeIdx)</span></div>
<div class="block">Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>codeIdx</code> - an index of the previously decoded QR code.
When REF: decode or REF: detectAndDecode is used, valid value is zero.
For REF: decodeMulti or REF: detectAndDecodeMulti use indices corresponding to the output order.</dd>
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="getEncoding()">
<h3>getEncoding</h3>
<div class="member-signature"><span class="modifiers">public</span>&nbsp;<span class="return-type">int</span>&nbsp;<span class="element-name">getEncoding</span>()</div>
<div class="block">Returns a kind of encoding for the decoded info from the latest REF: decode or REF: detectAndDecode call
When REF: decode or REF: detectAndDecode is used, valid value is zero.
For REF: decodeMulti or REF: detectAndDecodeMulti use indices corresponding to the output order.</div>
<dl class="notes">
<dt>Returns:</dt>
<dd>automatically generated</dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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