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<title>MultiFormatReader (ZXing 3.5.4 API)</title>
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<div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">com.google.zxing</a></div>
<h1 title="Class MultiFormatReader" class="title">Class MultiFormatReader</h1>
</div>
<div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a>
<div class="inheritance">com.google.zxing.MultiFormatReader</div>
</div>
<section class="class-description" id="class-description">
<dl class="notes">
<dt>All Implemented Interfaces:</dt>
<dd><code><a href="Reader.html" title="interface in com.google.zxing">Reader</a></code></dd>
</dl>
<hr>
<div class="type-signature"><span class="modifiers">public final class </span><span class="element-name type-name-label">MultiFormatReader</span>
<span class="extends-implements">extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a>
implements <a href="Reader.html" title="interface in com.google.zxing">Reader</a></span></div>
<div class="block">MultiFormatReader is a convenience class and the main entry point into the library for most uses.
By default it attempts to decode all barcode formats that the library supports. Optionally, you
can provide a hints object to request different behavior, for example only decoding QR codes.</div>
<dl class="notes">
<dt>Author:</dt>
<dd>Sean Owen, dswitkin@google.com (Daniel Switkin)</dd>
</dl>
</section>
<section class="summary">
<ul class="summary-list">
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<section class="constructor-summary" id="constructor-summary">
<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">MultiFormatReader</a>()</code></div>
<div class="col-last even-row-color"> </div>
</div>
</section>
</li>
<!-- ========== METHOD SUMMARY =========== -->
<li>
<section class="method-summary" id="method-summary">
<h2>Method Summary</h2>
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<div class="summary-table three-column-summary">
<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-tab2 method-summary-table-tab4"><code><a href="Result.html" title="class in com.google.zxing">Result</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#decode(com.google.zxing.BinaryBitmap)" class="member-name-link">decode</a><wbr>(<a href="BinaryBitmap.html" title="class in com.google.zxing">BinaryBitmap</a> image)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it
passes null as a hint to the decoders.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="Result.html" title="class in com.google.zxing">Result</a></code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#decode(com.google.zxing.BinaryBitmap,java.util.Map)" class="member-name-link">decode</a><wbr>(<a href="BinaryBitmap.html" title="class in com.google.zxing">BinaryBitmap</a> image,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a><<a href="DecodeHintType.html" title="enum in com.google.zxing">DecodeHintType</a>,<wbr>?> hints)</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Decode an image using the hints provided.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="Result.html" title="class in com.google.zxing">Result</a></code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#decodeWithState(com.google.zxing.BinaryBitmap)" class="member-name-link">decodeWithState</a><wbr>(<a href="BinaryBitmap.html" title="class in com.google.zxing">BinaryBitmap</a> image)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Decode an image using the state set up by calling setHints() previously.</div>
</div>
<div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#reset()" class="member-name-link">reset</a>()</code></div>
<div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">Resets any internal state the implementation has after a decode, to prepare it
for reuse.</div>
</div>
<div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>void</code></div>
<div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#setHints(java.util.Map)" class="member-name-link">setHints</a><wbr>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a><<a href="DecodeHintType.html" title="enum in com.google.zxing">DecodeHintType</a>,<wbr>?> hints)</code></div>
<div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4">
<div class="block">This method adds state to the MultiFormatReader.</div>
</div>
</div>
</div>
</div>
<div class="inherited-list">
<h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3>
<code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#clone--" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/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/javase/8/docs/api/java/lang/Object.html#finalize--" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#getClass--" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#hashCode--" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notify--" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#notifyAll--" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#toString--" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait--" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html#wait-long-" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/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="<init>()">
<h3>MultiFormatReader</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="element-name">MultiFormatReader</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="decode(com.google.zxing.BinaryBitmap)">
<h3>decode</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="Result.html" title="class in com.google.zxing">Result</a></span> <span class="element-name">decode</span><wbr><span class="parameters">(<a href="BinaryBitmap.html" title="class in com.google.zxing">BinaryBitmap</a> image)</span>
throws <span class="exceptions"><a href="NotFoundException.html" title="class in com.google.zxing">NotFoundException</a></span></div>
<div class="block">This version of decode honors the intent of Reader.decode(BinaryBitmap) in that it
passes null as a hint to the decoders. However, that makes it inefficient to call repeatedly.
Use setHints() followed by decodeWithState() for continuous scan applications.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="Reader.html#decode(com.google.zxing.BinaryBitmap)">decode</a></code> in interface <code><a href="Reader.html" title="interface in com.google.zxing">Reader</a></code></dd>
<dt>Parameters:</dt>
<dd><code>image</code> - The pixel data to decode</dd>
<dt>Returns:</dt>
<dd>The contents of the image</dd>
<dt>Throws:</dt>
<dd><code><a href="NotFoundException.html" title="class in com.google.zxing">NotFoundException</a></code> - Any errors which occurred</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="decode(com.google.zxing.BinaryBitmap,java.util.Map)">
<h3>decode</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="Result.html" title="class in com.google.zxing">Result</a></span> <span class="element-name">decode</span><wbr><span class="parameters">(<a href="BinaryBitmap.html" title="class in com.google.zxing">BinaryBitmap</a> image,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a><<a href="DecodeHintType.html" title="enum in com.google.zxing">DecodeHintType</a>,<wbr>?> hints)</span>
throws <span class="exceptions"><a href="NotFoundException.html" title="class in com.google.zxing">NotFoundException</a></span></div>
<div class="block">Decode an image using the hints provided. Does not honor existing state.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="Reader.html#decode(com.google.zxing.BinaryBitmap,java.util.Map)">decode</a></code> in interface <code><a href="Reader.html" title="interface in com.google.zxing">Reader</a></code></dd>
<dt>Parameters:</dt>
<dd><code>image</code> - The pixel data to decode</dd>
<dd><code>hints</code> - The hints to use, clearing the previous state.</dd>
<dt>Returns:</dt>
<dd>The contents of the image</dd>
<dt>Throws:</dt>
<dd><code><a href="NotFoundException.html" title="class in com.google.zxing">NotFoundException</a></code> - Any errors which occurred</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="decodeWithState(com.google.zxing.BinaryBitmap)">
<h3>decodeWithState</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="Result.html" title="class in com.google.zxing">Result</a></span> <span class="element-name">decodeWithState</span><wbr><span class="parameters">(<a href="BinaryBitmap.html" title="class in com.google.zxing">BinaryBitmap</a> image)</span>
throws <span class="exceptions"><a href="NotFoundException.html" title="class in com.google.zxing">NotFoundException</a></span></div>
<div class="block">Decode an image using the state set up by calling setHints() previously. Continuous scan
clients will get a <b>large</b> speed increase by using this instead of decode().</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>image</code> - The pixel data to decode</dd>
<dt>Returns:</dt>
<dd>The contents of the image</dd>
<dt>Throws:</dt>
<dd><code><a href="NotFoundException.html" title="class in com.google.zxing">NotFoundException</a></code> - Any errors which occurred</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="setHints(java.util.Map)">
<h3>setHints</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">setHints</span><wbr><span class="parameters">(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html" title="class or interface in java.util" class="external-link">Map</a><<a href="DecodeHintType.html" title="enum in com.google.zxing">DecodeHintType</a>,<wbr>?> hints)</span></div>
<div class="block">This method adds state to the MultiFormatReader. By setting the hints once, subsequent calls
to decodeWithState(image) can reuse the same set of readers without reallocating memory. This
is important for performance in continuous scan clients.</div>
<dl class="notes">
<dt>Parameters:</dt>
<dd><code>hints</code> - The set of hints to use for subsequent calls to decode(image)</dd>
</dl>
</section>
</li>
<li>
<section class="detail" id="reset()">
<h3>reset</h3>
<div class="member-signature"><span class="modifiers">public</span> <span class="return-type">void</span> <span class="element-name">reset</span>()</div>
<div class="block"><span class="description-from-type-label">Description copied from interface: <code><a href="Reader.html#reset()">Reader</a></code></span></div>
<div class="block">Resets any internal state the implementation has after a decode, to prepare it
for reuse.</div>
<dl class="notes">
<dt>Specified by:</dt>
<dd><code><a href="Reader.html#reset()">reset</a></code> in interface <code><a href="Reader.html" title="interface in com.google.zxing">Reader</a></code></dd>
</dl>
</section>
</li>
</ul>
</section>
</li>
</ul>
</section>
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