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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>grabcut: GStreamer Bad Plugins 1.0 Plugins Reference Manual</title>
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<td width="100%" align="left" class="shortcuts">
<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#gst-plugins-bad-plugins-grabcut.description" class="shortcut">Description</a></span><span id="nav_hierarchy">  <span class="dim">|</span> 
                  <a href="#gst-plugins-bad-plugins-grabcut.object-hierarchy" class="shortcut">Object Hierarchy</a></span><span id="nav_properties">  <span class="dim">|</span> 
                  <a href="#gst-plugins-bad-plugins-grabcut.properties" class="shortcut">Properties</a></span>
</td>
<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
<td><a accesskey="u" href="ch01.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td>
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</tr></table>
<div class="refentry">
<a name="gst-plugins-bad-plugins-grabcut"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-bad-plugins-grabcut.top_of_page"></a>grabcut</span></h2>
<p>grabcut</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.properties"></a><h2>Properties</h2>
<div class="informaltable"><table class="informaltable" border="0">
<colgroup>
<col width="150px" class="properties_type">
<col width="300px" class="properties_name">
<col width="200px" class="properties_flags">
</colgroup>
<tbody>
<tr>
<td class="property_type"><a href="../glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-grabcut.html#GstGrabcut--scale" title="The “scale” property">scale</a></td>
<td class="property_flags">Read / Write</td>
</tr>
<tr>
<td class="property_type"><a href="../glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></td>
<td class="property_name"><a class="link" href="gst-plugins-bad-plugins-grabcut.html#GstGrabcut--test-mode" title="The “test-mode” property">test-mode</a></td>
<td class="property_flags">Read / Write</td>
</tr>
</tbody>
</table></div>
</div>
<a name="GstGrabcut"></a><div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody><tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gst-plugins-bad-plugins-grabcut.html#GstGrabcut-struct" title="struct GstGrabcut">GstGrabcut</a></td>
</tr></tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">    <a href="../gobject/gobject-The-Base-Object-Type.html#GObject-struct">GObject</a>
    <span class="lineart">╰──</span> <a href="../gobject/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
        <span class="lineart">╰──</span> <a href="../gstreamer-1.0/GstObject.html#GstObject-struct">GstObject</a>
            <span class="lineart">╰──</span> <a href="../gstreamer-1.0/GstElement.html#GstElement-struct">GstElement</a>
                <span class="lineart">╰──</span> <a href="../gstreamer-libs-1.0/GstBaseTransform.html#GstBaseTransform-struct">GstBaseTransform</a>
                    <span class="lineart">╰──</span> <a href="../gst-plugins-base-libs-1.0/GstVideoFilter.html#GstVideoFilter-struct">GstVideoFilter</a>
                        <span class="lineart">╰──</span> GstOpencvVideoFilter
                            <span class="lineart">╰──</span> GstGrabcut
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.description"></a><h2>Description</h2>
<p>This element is a wrapper around OpenCV grabcut implementation. GrabCut is an
image segmentation method based on graph cuts technique. It can be seen as a
way of fine-grain segmenting the image from some FG and BG "seed" areas. The
OpenCV implementation follows the article [1].
The "seed" areas are taken in this element from either an input bounding box
coming from a face detection, or from alpha channel values. The input box is
taken from a "face" event such as the one generated from the 'facedetect'
element. The Alpha channel values should be one of the following (cv.hpp):
enum{
 GC_BGD    = 0,  //!&lt; background
 GC_FGD    = 1,  //!&lt; foreground
 GC_PR_BGD = 2,  //!&lt; most probably background
 GC_PR_FGD = 3   //!&lt; most probably foreground
};
with values over GC_PR_FGD interpreted as GC_PR_FGD. IN CASE OF no alpha mask
input (all 0's or all 1's), the 'GstOpenCvFaceDetect-face' downstream event
is used to create a bbox of PR_FG elements. If both foreground alpha
is not specified and there is no face detection, nothing is done.</p>
<p>[1] C. Rother, V. Kolmogorov, and A. Blake, "GrabCut: Interactive foreground
extraction using iterated graph cuts, ACM Trans. Graph., vol. 23, pp. 309–314,
2004.</p>
<div class="refsect2">
<a name="id-1.2.105.7.4"></a><h3>Example launch line</h3>
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">--</span>gst<span class="gtkdoc opt">-</span>debug<span class="gtkdoc opt">=</span>grabcut<span class="gtkdoc opt">=</span><span class="number">4</span>  v4l2src device<span class="gtkdoc opt">=/</span>dev<span class="gtkdoc opt">/</span>video0 <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> grabcut <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>width<span class="gtkdoc opt">=</span><span class="number">320</span><span class="gtkdoc opt">,</span>height<span class="gtkdoc opt">=</span><span class="number">240</span> <span class="gtkdoc opt">!</span> ximagesink</pre></td>
      </tr>
    </tbody>
  </table>
</div>

Another example launch line
<div class="informalexample">
  <table class="listing_frame" border="0" cellpadding="0" cellspacing="0">
    <tbody>
      <tr>
        <td class="listing_lines" align="right"><pre>1</pre></td>
        <td class="listing_code"><pre class="programlisting">gst<span class="gtkdoc opt">-</span>launch<span class="gtkdoc opt">-</span><span class="number">1.0</span> <span class="gtkdoc opt">--</span>gst<span class="gtkdoc opt">-</span>debug<span class="gtkdoc opt">=</span>grabcut<span class="gtkdoc opt">=</span><span class="number">4</span>  v4l2src device<span class="gtkdoc opt">=/</span>dev<span class="gtkdoc opt">/</span>video0 <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> facedetect display<span class="gtkdoc opt">=</span><span class="number">0</span> <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> grabcut test<span class="gtkdoc opt">-</span>mode<span class="gtkdoc opt">=</span><span class="keyword">true</span> <span class="gtkdoc opt">!</span> videoconvert <span class="gtkdoc opt">!</span> video<span class="gtkdoc opt">/</span>x<span class="gtkdoc opt">-</span>raw<span class="gtkdoc opt">,</span>width<span class="gtkdoc opt">=</span><span class="number">320</span><span class="gtkdoc opt">,</span>height<span class="gtkdoc opt">=</span><span class="number">240</span> <span class="gtkdoc opt">!</span> ximagesink</pre></td>
      </tr>
    </tbody>
  </table>
</div>

</div>
<div class="refsynopsisdiv">
<h2>Synopsis</h2>
<div class="refsect2">
<a name="id-1.2.105.7.5.1"></a><h3>Element Information</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">plugin</span></p></td>
<td>
            <a class="link" href="gst-plugins-bad-plugins-plugin-opencv.html#plugin-opencv">opencv</a>
          </td>
</tr>
<tr>
<td><p><span class="term">author</span></p></td>
<td>Miguel Casas-Sanchez &lt;miguelecasassanchez@gmail.com&gt;</td>
</tr>
<tr>
<td><p><span class="term">class</span></p></td>
<td>Filter/Effect/Video</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="id-1.2.105.7.5.2"></a><h3>Element Pads</h3>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>sink</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>sink</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>video/x-raw, format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
</tr>
</tbody>
</table></div>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term">name</span></p></td>
<td>src</td>
</tr>
<tr>
<td><p><span class="term">direction</span></p></td>
<td>source</td>
</tr>
<tr>
<td><p><span class="term">presence</span></p></td>
<td>always</td>
</tr>
<tr>
<td><p><span class="term">details</span></p></td>
<td>video/x-raw, format=(string)RGBA, width=(int)[ 1, 2147483647 ], height=(int)[ 1, 2147483647 ], framerate=(fraction)[ 0/1, 2147483647/1 ]</td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.functions_details"></a><h2>Functions</h2>
<p></p>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstGrabcut-struct"></a><h3>struct GstGrabcut</h3>
<pre class="programlisting">struct GstGrabcut;</pre>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-plugins-grabcut.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstGrabcut--scale"></a><h3>The <code class="literal">“scale”</code> property</h3>
<pre class="programlisting">  “scale”                    <a href="../glib/glib-Basic-Types.html#gfloat"><span class="type">gfloat</span></a></pre>
<p>Grow factor for the face bounding box, if present.</p>
<p>Flags: Read / Write</p>
<p>Allowed values: [1,4]</p>
<p>Default value: 1.6</p>
</div>
<hr>
<div class="refsect2">
<a name="GstGrabcut--test-mode"></a><h3>The <code class="literal">“test-mode”</code> property</h3>
<pre class="programlisting">  “test-mode”                <a href="../glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a></pre>
<p>If true, the output RGB is overwritten with the segmented foreground. Alpha channel same as normal case .</p>
<p>Flags: Read / Write</p>
<p>Default value: FALSE</p>
</div>
</div>
</div>
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