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<title>Imgcodecs (OpenCV 4.5.5 Java documentation)</title>
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<div class="subTitle">org.opencv.imgcodecs</div>
<h2 title="Class Imgcodecs" class="title">Class Imgcodecs</h2>
</div>
<div class="contentContainer">
<ul class="inheritance">
<li>java.lang.Object</li>
<li>
<ul class="inheritance">
<li>org.opencv.imgcodecs.Imgcodecs</li>
</ul>
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<pre>public class <span class="typeNameLabel">Imgcodecs</span>
extends java.lang.Object</pre>
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</ul>
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<!-- =========== FIELD SUMMARY =========== -->
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<h3>Field Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Field Summary table, listing fields, and an explanation">
<caption><span>Fields</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Field and Description</th>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_ANYCOLOR">IMREAD_ANYCOLOR</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_ANYDEPTH">IMREAD_ANYDEPTH</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_COLOR">IMREAD_COLOR</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_GRAYSCALE">IMREAD_GRAYSCALE</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_IGNORE_ORIENTATION">IMREAD_IGNORE_ORIENTATION</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_LOAD_GDAL">IMREAD_LOAD_GDAL</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_REDUCED_COLOR_2">IMREAD_REDUCED_COLOR_2</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_REDUCED_COLOR_4">IMREAD_REDUCED_COLOR_4</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_REDUCED_COLOR_8">IMREAD_REDUCED_COLOR_8</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_REDUCED_GRAYSCALE_2">IMREAD_REDUCED_GRAYSCALE_2</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_REDUCED_GRAYSCALE_4">IMREAD_REDUCED_GRAYSCALE_4</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_REDUCED_GRAYSCALE_8">IMREAD_REDUCED_GRAYSCALE_8</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMREAD_UNCHANGED">IMREAD_UNCHANGED</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION">IMWRITE_EXR_COMPRESSION</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_B44">IMWRITE_EXR_COMPRESSION_B44</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_B44A">IMWRITE_EXR_COMPRESSION_B44A</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_DWAA">IMWRITE_EXR_COMPRESSION_DWAA</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_DWAB">IMWRITE_EXR_COMPRESSION_DWAB</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_NO">IMWRITE_EXR_COMPRESSION_NO</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_PIZ">IMWRITE_EXR_COMPRESSION_PIZ</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_PXR24">IMWRITE_EXR_COMPRESSION_PXR24</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_RLE">IMWRITE_EXR_COMPRESSION_RLE</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_ZIP">IMWRITE_EXR_COMPRESSION_ZIP</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_COMPRESSION_ZIPS">IMWRITE_EXR_COMPRESSION_ZIPS</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_TYPE">IMWRITE_EXR_TYPE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_TYPE_FLOAT">IMWRITE_EXR_TYPE_FLOAT</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_EXR_TYPE_HALF">IMWRITE_EXR_TYPE_HALF</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG_CHROMA_QUALITY">IMWRITE_JPEG_CHROMA_QUALITY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG_LUMA_QUALITY">IMWRITE_JPEG_LUMA_QUALITY</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG_OPTIMIZE">IMWRITE_JPEG_OPTIMIZE</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG_PROGRESSIVE">IMWRITE_JPEG_PROGRESSIVE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG_QUALITY">IMWRITE_JPEG_QUALITY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG_RST_INTERVAL">IMWRITE_JPEG_RST_INTERVAL</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_JPEG2000_COMPRESSION_X1000">IMWRITE_JPEG2000_COMPRESSION_X1000</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_FORMAT_BLACKANDWHITE">IMWRITE_PAM_FORMAT_BLACKANDWHITE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_FORMAT_GRAYSCALE">IMWRITE_PAM_FORMAT_GRAYSCALE</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_FORMAT_GRAYSCALE_ALPHA">IMWRITE_PAM_FORMAT_GRAYSCALE_ALPHA</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_FORMAT_NULL">IMWRITE_PAM_FORMAT_NULL</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_FORMAT_RGB">IMWRITE_PAM_FORMAT_RGB</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_FORMAT_RGB_ALPHA">IMWRITE_PAM_FORMAT_RGB_ALPHA</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PAM_TUPLETYPE">IMWRITE_PAM_TUPLETYPE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_BILEVEL">IMWRITE_PNG_BILEVEL</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_COMPRESSION">IMWRITE_PNG_COMPRESSION</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_STRATEGY">IMWRITE_PNG_STRATEGY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_STRATEGY_DEFAULT">IMWRITE_PNG_STRATEGY_DEFAULT</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_STRATEGY_FILTERED">IMWRITE_PNG_STRATEGY_FILTERED</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_STRATEGY_FIXED">IMWRITE_PNG_STRATEGY_FIXED</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_STRATEGY_HUFFMAN_ONLY">IMWRITE_PNG_STRATEGY_HUFFMAN_ONLY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PNG_STRATEGY_RLE">IMWRITE_PNG_STRATEGY_RLE</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_PXM_BINARY">IMWRITE_PXM_BINARY</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_TIFF_COMPRESSION">IMWRITE_TIFF_COMPRESSION</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_TIFF_RESUNIT">IMWRITE_TIFF_RESUNIT</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_TIFF_XDPI">IMWRITE_TIFF_XDPI</a></span></code>&nbsp;</td>
</tr>
<tr class="rowColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_TIFF_YDPI">IMWRITE_TIFF_YDPI</a></span></code>&nbsp;</td>
</tr>
<tr class="altColor">
<td class="colFirst"><code>static int</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#IMWRITE_WEBP_QUALITY">IMWRITE_WEBP_QUALITY</a></span></code>&nbsp;</td>
</tr>
</table>
</li>
</ul>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
<ul class="blockList">
<li class="blockList"><a name="constructor.summary">
<!-- -->
</a>
<h3>Constructor Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Constructor Summary table, listing constructors, and an explanation">
<caption><span>Constructors</span><span class="tabEnd">&nbsp;</span></caption>
<tr>
<th class="colOne" scope="col">Constructor and Description</th>
</tr>
<tr class="altColor">
<td class="colOne"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#Imgcodecs--">Imgcodecs</a></span>()</code>&nbsp;</td>
</tr>
</table>
</li>
</ul>
<!-- ========== METHOD SUMMARY =========== -->
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<li class="blockList"><a name="method.summary">
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</a>
<h3>Method Summary</h3>
<table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation">
<caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd">&nbsp;</span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd">&nbsp;</span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd">&nbsp;</span></span></caption>
<tr>
<th class="colFirst" scope="col">Modifier and Type</th>
<th class="colLast" scope="col">Method and Description</th>
</tr>
<tr id="i0" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#haveImageReader-java.lang.String-">haveImageReader</a></span>(java.lang.String&nbsp;filename)</code>
<div class="block">Returns true if the specified image can be decoded by OpenCV</div>
</td>
</tr>
<tr id="i1" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#haveImageWriter-java.lang.String-">haveImageWriter</a></span>(java.lang.String&nbsp;filename)</code>
<div class="block">Returns true if an image with the specified filename can be encoded by OpenCV</div>
</td>
</tr>
<tr id="i2" class="altColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imcount-java.lang.String-">imcount</a></span>(java.lang.String&nbsp;filename)</code>
<div class="block">Returns the number of images inside the give file
The function imcount will return the number of pages in a multi-page image, or 1 for single-page images</div>
</td>
</tr>
<tr id="i3" class="rowColor">
<td class="colFirst"><code>static long</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imcount-java.lang.String-int-">imcount</a></span>(java.lang.String&nbsp;filename,
int&nbsp;flags)</code>
<div class="block">Returns the number of images inside the give file
The function imcount will return the number of pages in a multi-page image, or 1 for single-page images</div>
</td>
</tr>
<tr id="i4" class="altColor">
<td class="colFirst"><code>static <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/imgcodecs/Imgcodecs.html#imdecode-org.opencv.core.Mat-int-">imdecode</a></span>(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;buf,
int&nbsp;flags)</code>
<div class="block">Reads an image from a buffer in memory.</div>
</td>
</tr>
<tr id="i5" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imencode-java.lang.String-org.opencv.core.Mat-org.opencv.core.MatOfByte-">imencode</a></span>(java.lang.String&nbsp;ext,
<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../../../org/opencv/core/MatOfByte.html" title="class in org.opencv.core">MatOfByte</a>&nbsp;buf)</code>
<div class="block">Encodes an image into a memory buffer.</div>
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<tr id="i6" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imencode-java.lang.String-org.opencv.core.Mat-org.opencv.core.MatOfByte-org.opencv.core.MatOfInt-">imencode</a></span>(java.lang.String&nbsp;ext,
<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../../../org/opencv/core/MatOfByte.html" title="class in org.opencv.core">MatOfByte</a>&nbsp;buf,
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<div class="block">Encodes an image into a memory buffer.</div>
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<tr id="i7" class="rowColor">
<td class="colFirst"><code>static <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/imgcodecs/Imgcodecs.html#imread-java.lang.String-">imread</a></span>(java.lang.String&nbsp;filename)</code>
<div class="block">Loads an image from a file.</div>
</td>
</tr>
<tr id="i8" class="altColor">
<td class="colFirst"><code>static <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/imgcodecs/Imgcodecs.html#imread-java.lang.String-int-">imread</a></span>(java.lang.String&nbsp;filename,
int&nbsp;flags)</code>
<div class="block">Loads an image from a file.</div>
</td>
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<tr id="i9" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imreadmulti-java.lang.String-java.util.List-">imreadmulti</a></span>(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;mats)</code>
<div class="block">Loads a multi-page image from a file.</div>
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<tr id="i10" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
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int&nbsp;flags)</code>
<div class="block">Loads a multi-page image from a file.</div>
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<tr id="i11" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imreadmulti-java.lang.String-java.util.List-int-int-">imreadmulti</a></span>(java.lang.String&nbsp;filename,
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<div class="block">Loads a of images of a multi-page image from a file.</div>
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<tr id="i12" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imreadmulti-java.lang.String-java.util.List-int-int-int-">imreadmulti</a></span>(java.lang.String&nbsp;filename,
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<div class="block">Loads a of images of a multi-page image from a file.</div>
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<tr id="i13" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imwrite-java.lang.String-org.opencv.core.Mat-">imwrite</a></span>(java.lang.String&nbsp;filename,
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<div class="block">Saves an image to a specified file.</div>
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<tr id="i14" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imwrite-java.lang.String-org.opencv.core.Mat-org.opencv.core.MatOfInt-">imwrite</a></span>(java.lang.String&nbsp;filename,
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<a href="../../../org/opencv/core/MatOfInt.html" title="class in org.opencv.core">MatOfInt</a>&nbsp;params)</code>
<div class="block">Saves an image to a specified file.</div>
</td>
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<tr id="i15" class="rowColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imwritemulti-java.lang.String-java.util.List-">imwritemulti</a></span>(java.lang.String&nbsp;filename,
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<tr id="i16" class="altColor">
<td class="colFirst"><code>static boolean</code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../org/opencv/imgcodecs/Imgcodecs.html#imwritemulti-java.lang.String-java.util.List-org.opencv.core.MatOfInt-">imwritemulti</a></span>(java.lang.String&nbsp;filename,
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<pre>public static final&nbsp;int IMWRITE_EXR_COMPRESSION_PIZ</pre>
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<pre>public static final&nbsp;int IMWRITE_EXR_COMPRESSION_ZIPS</pre>
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<pre>public static final&nbsp;int IMWRITE_JPEG_PROGRESSIVE</pre>
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<pre>public static final&nbsp;int IMWRITE_JPEG_QUALITY</pre>
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<pre>public static final&nbsp;int IMWRITE_JPEG_RST_INTERVAL</pre>
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<pre>public static final&nbsp;int IMWRITE_JPEG2000_COMPRESSION_X1000</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_FORMAT_BLACKANDWHITE</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_FORMAT_GRAYSCALE</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_FORMAT_GRAYSCALE_ALPHA</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_FORMAT_NULL</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_FORMAT_RGB</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_FORMAT_RGB_ALPHA</pre>
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<pre>public static final&nbsp;int IMWRITE_PAM_TUPLETYPE</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_BILEVEL</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_STRATEGY</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_STRATEGY_DEFAULT</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_STRATEGY_FILTERED</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_STRATEGY_FIXED</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_STRATEGY_HUFFMAN_ONLY</pre>
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<pre>public static final&nbsp;int IMWRITE_PNG_STRATEGY_RLE</pre>
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<pre>public static final&nbsp;int IMWRITE_PXM_BINARY</pre>
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<pre>public static final&nbsp;int IMWRITE_TIFF_COMPRESSION</pre>
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<pre>public static final&nbsp;int IMWRITE_TIFF_RESUNIT</pre>
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<pre>public static final&nbsp;int IMWRITE_TIFF_XDPI</pre>
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<pre>public static final&nbsp;int IMWRITE_TIFF_YDPI</pre>
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<pre>public static final&nbsp;int IMWRITE_WEBP_QUALITY</pre>
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<pre>public&nbsp;Imgcodecs()</pre>
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<pre>public static&nbsp;boolean&nbsp;haveImageReader(java.lang.String&nbsp;filename)</pre>
<div class="block">Returns true if the specified image can be decoded by OpenCV</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - File name of the image</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
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<pre>public static&nbsp;boolean&nbsp;haveImageWriter(java.lang.String&nbsp;filename)</pre>
<div class="block">Returns true if an image with the specified filename can be encoded by OpenCV</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - File name of the image</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
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<pre>public static&nbsp;long&nbsp;imcount(java.lang.String&nbsp;filename)</pre>
<div class="block">Returns the number of images inside the give file
The function imcount will return the number of pages in a multi-page image, or 1 for single-page images</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
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<pre>public static&nbsp;long&nbsp;imcount(java.lang.String&nbsp;filename,
int&nbsp;flags)</pre>
<div class="block">Returns the number of images inside the give file
The function imcount will return the number of pages in a multi-page image, or 1 for single-page images</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dd><code>flags</code> - Flag that can take values of cv::ImreadModes, default with cv::IMREAD_ANYCOLOR.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
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<pre>public static&nbsp;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;imdecode(<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;buf,
int&nbsp;flags)</pre>
<div class="block">Reads an image from a buffer in memory.
The function imdecode reads an image from the specified buffer in the memory. If the buffer is too short or
contains invalid data, the function returns an empty matrix ( Mat::data==NULL ).
See cv::imread for the list of supported formats and flags description.
<b>Note:</b> In the case of color images, the decoded images will have the channels stored in <b>B G R</b> order.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>buf</code> - Input array or vector of bytes.</dd>
<dd><code>flags</code> - The same flags as in cv::imread, see cv::ImreadModes.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
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<pre>public static&nbsp;boolean&nbsp;imencode(java.lang.String&nbsp;ext,
<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../../../org/opencv/core/MatOfByte.html" title="class in org.opencv.core">MatOfByte</a>&nbsp;buf)</pre>
<div class="block">Encodes an image into a memory buffer.
The function imencode compresses the image and stores it in the memory buffer that is resized to fit the
result. See cv::imwrite for the list of supported formats and flags description.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ext</code> - File extension that defines the output format.</dd>
<dd><code>img</code> - Image to be written.</dd>
<dd><code>buf</code> - Output buffer resized to fit the compressed image.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
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<pre>public static&nbsp;boolean&nbsp;imencode(java.lang.String&nbsp;ext,
<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../../../org/opencv/core/MatOfByte.html" title="class in org.opencv.core">MatOfByte</a>&nbsp;buf,
<a href="../../../org/opencv/core/MatOfInt.html" title="class in org.opencv.core">MatOfInt</a>&nbsp;params)</pre>
<div class="block">Encodes an image into a memory buffer.
The function imencode compresses the image and stores it in the memory buffer that is resized to fit the
result. See cv::imwrite for the list of supported formats and flags description.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>ext</code> - File extension that defines the output format.</dd>
<dd><code>img</code> - Image to be written.</dd>
<dd><code>buf</code> - Output buffer resized to fit the compressed image.</dd>
<dd><code>params</code> - Format-specific parameters. See cv::imwrite and cv::ImwriteFlags.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
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<pre>public static&nbsp;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;imread(java.lang.String&nbsp;filename)</pre>
<div class="block">Loads an image from a file.
imread
The function imread loads an image from the specified file and returns it. If the image cannot be
read (because of missing file, improper permissions, unsupported or invalid format), the function
returns an empty matrix ( Mat::data==NULL ).
Currently, the following file formats are supported:
<ul>
<li>
Windows bitmaps - \*.bmp, \*.dib (always supported)
</li>
<li>
JPEG files - \*.jpeg, \*.jpg, \*.jpe (see the *Note* section)
</li>
<li>
JPEG 2000 files - \*.jp2 (see the *Note* section)
</li>
<li>
Portable Network Graphics - \*.png (see the *Note* section)
</li>
<li>
WebP - \*.webp (see the *Note* section)
</li>
<li>
Portable image format - \*.pbm, \*.pgm, \*.ppm \*.pxm, \*.pnm (always supported)
</li>
<li>
PFM files - \*.pfm (see the *Note* section)
</li>
<li>
Sun rasters - \*.sr, \*.ras (always supported)
</li>
<li>
TIFF files - \*.tiff, \*.tif (see the *Note* section)
</li>
<li>
OpenEXR Image files - \*.exr (see the *Note* section)
</li>
<li>
Radiance HDR - \*.hdr, \*.pic (always supported)
</li>
<li>
Raster and Vector geospatial data supported by GDAL (see the *Note* section)
</li>
</ul>
<b>Note:</b>
<ul>
<li>
The function determines the type of an image by the content, not by the file extension.
</li>
<li>
In the case of color images, the decoded images will have the channels stored in <b>B G R</b> order.
</li>
<li>
When using IMREAD_GRAYSCALE, the codec's internal grayscale conversion will be used, if available.
Results may differ to the output of cvtColor()
</li>
<li>
On Microsoft Windows\* OS and MacOSX\*, the codecs shipped with an OpenCV image (libjpeg,
libpng, libtiff, and libjasper) are used by default. So, OpenCV can always read JPEGs, PNGs,
and TIFFs. On MacOSX, there is also an option to use native MacOSX image readers. But beware
that currently these native image loaders give images with different pixel values because of
the color management embedded into MacOSX.
</li>
<li>
On Linux\*, BSD flavors and other Unix-like open-source operating systems, OpenCV looks for
codecs supplied with an OS image. Install the relevant packages (do not forget the development
files, for example, "libjpeg-dev", in Debian\* and Ubuntu\*) to get the codec support or turn
on the OPENCV_BUILD_3RDPARTY_LIBS flag in CMake.
</li>
<li>
In the case you set *WITH_GDAL* flag to true in CMake and REF: IMREAD_LOAD_GDAL to load the image,
then the [GDAL](http://www.gdal.org) driver will be used in order to decode the image, supporting
the following formats: [Raster](http://www.gdal.org/formats_list.html),
[Vector](http://www.gdal.org/ogr_formats.html).
</li>
<li>
If EXIF information is embedded in the image file, the EXIF orientation will be taken into account
and thus the image will be rotated accordingly except if the flags REF: IMREAD_IGNORE_ORIENTATION
or REF: IMREAD_UNCHANGED are passed.
</li>
<li>
Use the IMREAD_UNCHANGED flag to keep the floating point values from PFM image.
</li>
<li>
By default number of pixels must be less than 2^30. Limit can be set using system
variable OPENCV_IO_MAX_IMAGE_PIXELS
</li>
</ul></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;imread(java.lang.String&nbsp;filename,
int&nbsp;flags)</pre>
<div class="block">Loads an image from a file.
imread
The function imread loads an image from the specified file and returns it. If the image cannot be
read (because of missing file, improper permissions, unsupported or invalid format), the function
returns an empty matrix ( Mat::data==NULL ).
Currently, the following file formats are supported:
<ul>
<li>
Windows bitmaps - \*.bmp, \*.dib (always supported)
</li>
<li>
JPEG files - \*.jpeg, \*.jpg, \*.jpe (see the *Note* section)
</li>
<li>
JPEG 2000 files - \*.jp2 (see the *Note* section)
</li>
<li>
Portable Network Graphics - \*.png (see the *Note* section)
</li>
<li>
WebP - \*.webp (see the *Note* section)
</li>
<li>
Portable image format - \*.pbm, \*.pgm, \*.ppm \*.pxm, \*.pnm (always supported)
</li>
<li>
PFM files - \*.pfm (see the *Note* section)
</li>
<li>
Sun rasters - \*.sr, \*.ras (always supported)
</li>
<li>
TIFF files - \*.tiff, \*.tif (see the *Note* section)
</li>
<li>
OpenEXR Image files - \*.exr (see the *Note* section)
</li>
<li>
Radiance HDR - \*.hdr, \*.pic (always supported)
</li>
<li>
Raster and Vector geospatial data supported by GDAL (see the *Note* section)
</li>
</ul>
<b>Note:</b>
<ul>
<li>
The function determines the type of an image by the content, not by the file extension.
</li>
<li>
In the case of color images, the decoded images will have the channels stored in <b>B G R</b> order.
</li>
<li>
When using IMREAD_GRAYSCALE, the codec's internal grayscale conversion will be used, if available.
Results may differ to the output of cvtColor()
</li>
<li>
On Microsoft Windows\* OS and MacOSX\*, the codecs shipped with an OpenCV image (libjpeg,
libpng, libtiff, and libjasper) are used by default. So, OpenCV can always read JPEGs, PNGs,
and TIFFs. On MacOSX, there is also an option to use native MacOSX image readers. But beware
that currently these native image loaders give images with different pixel values because of
the color management embedded into MacOSX.
</li>
<li>
On Linux\*, BSD flavors and other Unix-like open-source operating systems, OpenCV looks for
codecs supplied with an OS image. Install the relevant packages (do not forget the development
files, for example, "libjpeg-dev", in Debian\* and Ubuntu\*) to get the codec support or turn
on the OPENCV_BUILD_3RDPARTY_LIBS flag in CMake.
</li>
<li>
In the case you set *WITH_GDAL* flag to true in CMake and REF: IMREAD_LOAD_GDAL to load the image,
then the [GDAL](http://www.gdal.org) driver will be used in order to decode the image, supporting
the following formats: [Raster](http://www.gdal.org/formats_list.html),
[Vector](http://www.gdal.org/ogr_formats.html).
</li>
<li>
If EXIF information is embedded in the image file, the EXIF orientation will be taken into account
and thus the image will be rotated accordingly except if the flags REF: IMREAD_IGNORE_ORIENTATION
or REF: IMREAD_UNCHANGED are passed.
</li>
<li>
Use the IMREAD_UNCHANGED flag to keep the floating point values from PFM image.
</li>
<li>
By default number of pixels must be less than 2^30. Limit can be set using system
variable OPENCV_IO_MAX_IMAGE_PIXELS
</li>
</ul></div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dd><code>flags</code> - Flag that can take values of cv::ImreadModes</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;boolean&nbsp;imreadmulti(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;mats)</pre>
<div class="block">Loads a multi-page image from a file.
The function imreadmulti loads a multi-page image from the specified file into a vector of Mat objects.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dd><code>mats</code> - A vector of Mat objects holding each page, if more than one.
SEE: cv::imread</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;boolean&nbsp;imreadmulti(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;mats,
int&nbsp;flags)</pre>
<div class="block">Loads a multi-page image from a file.
The function imreadmulti loads a multi-page image from the specified file into a vector of Mat objects.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dd><code>flags</code> - Flag that can take values of cv::ImreadModes, default with cv::IMREAD_ANYCOLOR.</dd>
<dd><code>mats</code> - A vector of Mat objects holding each page, if more than one.
SEE: cv::imread</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;boolean&nbsp;imreadmulti(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;mats,
int&nbsp;start,
int&nbsp;count)</pre>
<div class="block">Loads a of images of a multi-page image from a file.
The function imreadmulti loads a specified range from a multi-page image from the specified file into a vector of Mat objects.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dd><code>start</code> - Start index of the image to load</dd>
<dd><code>count</code> - Count number of images to load</dd>
<dd><code>mats</code> - A vector of Mat objects holding each page, if more than one.
SEE: cv::imread</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;boolean&nbsp;imreadmulti(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;mats,
int&nbsp;start,
int&nbsp;count,
int&nbsp;flags)</pre>
<div class="block">Loads a of images of a multi-page image from a file.
The function imreadmulti loads a specified range from a multi-page image from the specified file into a vector of Mat objects.</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of file to be loaded.</dd>
<dd><code>start</code> - Start index of the image to load</dd>
<dd><code>count</code> - Count number of images to load</dd>
<dd><code>flags</code> - Flag that can take values of cv::ImreadModes, default with cv::IMREAD_ANYCOLOR.</dd>
<dd><code>mats</code> - A vector of Mat objects holding each page, if more than one.
SEE: cv::imread</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
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<pre>public static&nbsp;boolean&nbsp;imwrite(java.lang.String&nbsp;filename,
<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img)</pre>
<div class="block">Saves an image to a specified file.
The function imwrite saves the image to the specified file. The image format is chosen based on the
filename extension (see cv::imread for the list of extensions). In general, only 8-bit
single-channel or 3-channel (with 'BGR' channel order) images
can be saved using this function, with these exceptions:
<ul>
<li>
16-bit unsigned (CV_16U) images can be saved in the case of PNG, JPEG 2000, and TIFF formats
</li>
<li>
32-bit float (CV_32F) images can be saved in PFM, TIFF, OpenEXR, and Radiance HDR formats;
3-channel (CV_32FC3) TIFF images will be saved using the LogLuv high dynamic range encoding
(4 bytes per pixel)
</li>
<li>
PNG images with an alpha channel can be saved using this function. To do this, create
8-bit (or 16-bit) 4-channel image BGRA, where the alpha channel goes last. Fully transparent pixels
should have alpha set to 0, fully opaque pixels should have alpha set to 255/65535 (see the code sample below).
</li>
<li>
Multiple images (vector of Mat) can be saved in TIFF format (see the code sample below).
</li>
</ul>
If the image format is not supported, the image will be converted to 8-bit unsigned (CV_8U) and saved that way.
If the format, depth or channel order is different, use
Mat::convertTo and cv::cvtColor to convert it before saving. Or, use the universal FileStorage I/O
functions to save the image to XML or YAML format.
The sample below shows how to create a BGRA image, how to set custom compression parameters and save it to a PNG file.
It also demonstrates how to save multiple images in a TIFF file:
INCLUDE: snippets/imgcodecs_imwrite.cpp</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of the file.</dd>
<dd><code>img</code> - (Mat or vector of Mat) Image or Images to be saved.</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;boolean&nbsp;imwrite(java.lang.String&nbsp;filename,
<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&nbsp;img,
<a href="../../../org/opencv/core/MatOfInt.html" title="class in org.opencv.core">MatOfInt</a>&nbsp;params)</pre>
<div class="block">Saves an image to a specified file.
The function imwrite saves the image to the specified file. The image format is chosen based on the
filename extension (see cv::imread for the list of extensions). In general, only 8-bit
single-channel or 3-channel (with 'BGR' channel order) images
can be saved using this function, with these exceptions:
<ul>
<li>
16-bit unsigned (CV_16U) images can be saved in the case of PNG, JPEG 2000, and TIFF formats
</li>
<li>
32-bit float (CV_32F) images can be saved in PFM, TIFF, OpenEXR, and Radiance HDR formats;
3-channel (CV_32FC3) TIFF images will be saved using the LogLuv high dynamic range encoding
(4 bytes per pixel)
</li>
<li>
PNG images with an alpha channel can be saved using this function. To do this, create
8-bit (or 16-bit) 4-channel image BGRA, where the alpha channel goes last. Fully transparent pixels
should have alpha set to 0, fully opaque pixels should have alpha set to 255/65535 (see the code sample below).
</li>
<li>
Multiple images (vector of Mat) can be saved in TIFF format (see the code sample below).
</li>
</ul>
If the image format is not supported, the image will be converted to 8-bit unsigned (CV_8U) and saved that way.
If the format, depth or channel order is different, use
Mat::convertTo and cv::cvtColor to convert it before saving. Or, use the universal FileStorage I/O
functions to save the image to XML or YAML format.
The sample below shows how to create a BGRA image, how to set custom compression parameters and save it to a PNG file.
It also demonstrates how to save multiple images in a TIFF file:
INCLUDE: snippets/imgcodecs_imwrite.cpp</div>
<dl>
<dt><span class="paramLabel">Parameters:</span></dt>
<dd><code>filename</code> - Name of the file.</dd>
<dd><code>img</code> - (Mat or vector of Mat) Image or Images to be saved.</dd>
<dd><code>params</code> - Format-specific parameters encoded as pairs (paramId_1, paramValue_1, paramId_2, paramValue_2, ... .) see cv::ImwriteFlags</dd>
<dt><span class="returnLabel">Returns:</span></dt>
<dd>automatically generated</dd>
</dl>
</li>
</ul>
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<pre>public static&nbsp;boolean&nbsp;imwritemulti(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;img)</pre>
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<pre>public static&nbsp;boolean&nbsp;imwritemulti(java.lang.String&nbsp;filename,
java.util.List&lt;<a href="../../../org/opencv/core/Mat.html" title="class in org.opencv.core">Mat</a>&gt;&nbsp;img,
<a href="../../../org/opencv/core/MatOfInt.html" title="class in org.opencv.core">MatOfInt</a>&nbsp;params)</pre>
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