61 lines
12 KiB
HTML
61 lines
12 KiB
HTML
<!-- HTML header for doxygen 1.8.13-->
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html xmlns="http://www.w3.org/1999/xhtml">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
|
|
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
|
|
<meta name="generator" content="Doxygen 1.8.15"/>
|
|
<meta name="viewport" content="width=device-width, initial-scale=1"/>
|
|
<title>Generic Image Library: hessian.hpp Source File</title>
|
|
<link href="tabs.css" rel="stylesheet" type="text/css"/>
|
|
<script type="text/javascript" src="jquery.js"></script>
|
|
<script type="text/javascript" src="dynsections.js"></script>
|
|
<link href="doxygen.css" rel="stylesheet" type="text/css" />
|
|
<link href="doxygen-boost.css" rel="stylesheet" type="text/css"/>
|
|
</head>
|
|
<body>
|
|
<div class="boost-header">
|
|
<table border="0" cellpadding="7" cellspacing="0" width="100%" summary="header">
|
|
<tr>
|
|
<td valign="top" width="300">
|
|
<h3><a href="../index.html"><img alt="Boost GIL" src="../_static/gil.png" border="0"></a></h3>
|
|
</td>
|
|
<td ><h1 align="center"><a href="../index.html"></a></h1></td>
|
|
<td></td>
|
|
</tr>
|
|
</table>
|
|
</div>
|
|
<hr/>
|
|
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
|
|
<!-- Generated by Doxygen 1.8.15 -->
|
|
<script type="text/javascript" src="menudata.js"></script>
|
|
<script type="text/javascript" src="menu.js"></script>
|
|
<script type="text/javascript">
|
|
/* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */
|
|
$(function() {
|
|
initMenu('',false,false,'search.php','Search');
|
|
});
|
|
/* @license-end */</script>
|
|
<div id="main-nav"></div>
|
|
<div id="nav-path" class="navpath">
|
|
<ul>
|
|
<li class="navelem"><a class="el" href="dir_d44c64559bbebec7f509842c48db8b23.html">include</a></li><li class="navelem"><a class="el" href="dir_1878a3f4746a95c6aad317458cc7ef80.html">boost</a></li><li class="navelem"><a class="el" href="dir_df4750f408086f9b9c1b5ee4251365ff.html">gil</a></li><li class="navelem"><a class="el" href="dir_29d7d1879aced8e7726ea9a11f3c7333.html">image_processing</a></li> </ul>
|
|
</div>
|
|
</div><!-- top -->
|
|
<div class="header">
|
|
<div class="headertitle">
|
|
<div class="title">hessian.hpp</div> </div>
|
|
</div><!--header-->
|
|
<div class="contents">
|
|
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="preprocessor">#ifndef BOOST_GIL_IMAGE_PROCESSING_HESSIAN_HPP</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="preprocessor">#define BOOST_GIL_IMAGE_PROCESSING_HESSIAN_HPP</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> </div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="preprocessor">#include <boost/gil/image_view.hpp></span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include <boost/gil/typedefs.hpp></span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include <boost/gil/extension/numeric/kernel.hpp></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#include <stdexcept></span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> </div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">template</span> <<span class="keyword">typename</span> GradientView, <span class="keyword">typename</span> T, <span class="keyword">typename</span> Allocator, <span class="keyword">typename</span> OutputView></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> compute_hessian_responses(</div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span>  GradientView ddxx,</div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span>  GradientView dxdy,</div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span>  GradientView ddyy,</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  <span class="keyword">const</span> detail::kernel_2d<T, Allocator>& weights,</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  OutputView dst)</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> {</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  <span class="keywordflow">if</span> (ddxx.dimensions() != ddyy.dimensions()</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  || ddyy.dimensions() != dxdy.dimensions()</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  || dxdy.dimensions() != dst.dimensions()</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  || weights.center_x() != weights.center_y())</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  {</div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  <span class="keywordflow">throw</span> std::invalid_argument(<span class="stringliteral">"dimensions of views are not the same"</span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="stringliteral">" or weights don't have equal width and height"</span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="stringliteral">" or weights' dimensions are not odd"</span>);</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  }</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">// Use pixel type of output, as values will be written to output</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">using</span> pixel_t = <span class="keyword">typename</span> std::remove_reference<decltype(std::declval<OutputView>()(0, 0))>::type;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">using</span> channel_t = <span class="keyword">typename</span> std::remove_reference</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  decltype(std::declval<pixel_t>().at(std::integral_constant<int, 0>{}))</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  >::type;</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> </div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="keyword">auto</span> center = weights.center_y();</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> y = center; y < dst.height() - center; ++y)</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  {</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> x = center; x < dst.width() - center; ++x)</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  {</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">auto</span> ddxx_i = channel_t();</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">auto</span> ddyy_i = channel_t();</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keyword">auto</span> dxdy_i = channel_t();</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">for</span> (<span class="keyword">typename</span> OutputView::coord_t w_y = 0; w_y < weights.size(); ++w_y)</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  {</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">for</span> (<span class="keyword">typename</span> OutputView::coord_t w_x = 0; w_x < weights.size(); ++w_x)</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  {</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  ddxx_i += ddxx(x + w_x - center, y + w_y - center)</div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  .at(std::integral_constant<int, 0>{}) * weights.at(w_x, w_y);</div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  ddyy_i += ddyy(x + w_x - center, y + w_y - center)</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  .at(std::integral_constant<int, 0>{}) * weights.at(w_x, w_y);</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  dxdy_i += dxdy(x + w_x - center, y + w_y - center)</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  .at(std::integral_constant<int, 0>{}) * weights.at(w_x, w_y);</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  }</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  }</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">auto</span> determinant = ddxx_i * ddyy_i - dxdy_i * dxdy_i;</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  dst(x, y).at(std::integral_constant<int, 0>{}) = determinant;</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  }</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  }</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> }} <span class="comment">// namespace boost::gil</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#endif</span></div></div><!-- fragment --></div><!-- contents -->
|
|
<!-- HTML footer for doxygen 1.8.13-->
|
|
<!-- start footer part -->
|
|
<hr class="footer"/>
|
|
<address class="footer">
|
|
<small>
|
|
Generated by  <a href="http://www.doxygen.org/index.html">doxygen</a> 1.8.15
|
|
</small>
|
|
</address>
|
|
</body>
|
|
</html>
|