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<div class="title">diffusion.hpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright 2020 Olzhas Zhumabek <anonymous.from.applecity@gmail.com></span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Copyright 2021 Pranam Lashkari <plashkari628@gmail.com></span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// Use, modification and distribution are subject to the Boost Software License,</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>  </div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#ifndef BOOST_GIL_IMAGE_PROCESSING_DIFFUSION_HPP</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#define BOOST_GIL_IMAGE_PROCESSING_DIFFUSION_HPP</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>  </div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "boost/gil/detail/math.hpp"</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <boost/gil/algorithm.hpp></span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <boost/gil/color_base_algorithm.hpp></span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <boost/gil/image.hpp></span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <boost/gil/image_view.hpp></span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <boost/gil/image_view_factory.hpp></span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <boost/gil/pixel.hpp></span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <boost/gil/point.hpp></span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <boost/gil/typedefs.hpp></span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <functional></span></div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <numeric></span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <vector></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  </div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">namespace </span>boost { <span class="keyword">namespace </span>gil {</div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">namespace </span>conductivity {</div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">struct </span>perona_malik_conductivity</div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> {</div>
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<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">double</span> kappa;</div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  Pixel operator()(Pixel input)</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  {</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="keyword">using</span> channel_type = <span class="keyword">typename</span> channel_type<Pixel>::type;</div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="comment">// C++11 doesn't seem to capture members</span></div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  static_transform(input, input, [<span class="keyword">this</span>](channel_type value) {</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  value /= kappa;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">return</span> std::exp(-std::abs(value));</div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  });</div>
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<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  </div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> input;</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  }</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> };</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  </div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="keyword">struct </span>gaussian_conductivity</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> {</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">double</span> kappa;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  Pixel operator()(Pixel input)</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keyword">using</span> channel_type = <span class="keyword">typename</span> channel_type<Pixel>::type;</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// C++11 doesn't seem to capture members</span></div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  static_transform(input, input, [<span class="keyword">this</span>](channel_type value) {</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  value /= kappa;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">return</span> std::exp(-value * value);</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  });</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  </div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">return</span> input;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> };</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  </div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">struct </span>wide_regions_conductivity</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> {</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">double</span> kappa;</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  Pixel operator()(Pixel input)</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">using</span> channel_type = <span class="keyword">typename</span> channel_type<Pixel>::type;</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// C++11 doesn't seem to capture members</span></div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  static_transform(input, input, [<span class="keyword">this</span>](channel_type value) {</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  value /= kappa;</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> 1.0 / (1.0 + value * value);</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  });</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  </div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> input;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  }</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> };</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  </div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">struct </span>more_wide_regions_conductivity</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> {</div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordtype">double</span> kappa;</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  Pixel operator()(Pixel input)</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  {</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">using</span> channel_type = <span class="keyword">typename</span> channel_type<Pixel>::type;</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// C++11 doesn't seem to capture members</span></div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  static_transform(input, input, [<span class="keyword">this</span>](channel_type value) {</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  value /= kappa;</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">return</span> 1.0 / std::sqrt((1.0 + value * value));</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  });</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  </div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="keywordflow">return</span> input;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> };</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> } <span class="comment">// namespace diffusion</span></div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  </div>
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<div class="line"><a name="l00100"></a><span class="lineno"><a class="line" href="namespaceboost_1_1gil_1_1laplace__function.html"> 100</a></span> <span class="keyword">namespace </span>laplace_function {</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment">// The functions assume clockwise enumeration of stencil points, as such</span></div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// NW North NE 0 1 2 (-1, -1) (0, -1) (+1, -1)</span></div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment">// West East ===> 7 3 ===> (-1, 0) (+1, 0)</span></div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// SW South SE 6 5 4 (-1, +1) (0, +1) (+1, +1)</span></div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  </div>
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<div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="namespaceboost_1_1gil_1_1laplace__function.html#aabb7bfbc4ace7126a3c3c89717ce7a73"> 114</a></span> <span class="keyword">inline</span> std::array<gil::point_t, 8> <a class="code" href="namespaceboost_1_1gil_1_1laplace__function.html#aabb7bfbc4ace7126a3c3c89717ce7a73">get_directed_offsets</a>()</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> {</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="keywordflow">return</span> {<a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{-1, -1}, <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{0, -1}, <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{+1, -1}, <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{+1, 0},</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{+1, +1}, <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{0, +1}, <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{-1, +1}, <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a>{-1, 0}};</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> }</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  </div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="keyword">template</span> <<span class="keyword">typename</span> PixelType></div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="keyword">using</span> stencil_type = std::array<PixelType, 8>;</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  </div>
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<div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1laplace__function_1_1stencil__5points.html"> 128</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1laplace__function_1_1stencil__5points.html">stencil_5points</a></div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordtype">double</span> delta_t = 0.25;</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  </div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> SubImageView></div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  stencil_type<typename SubImageView::value_type> compute_laplace(SubImageView <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>,</div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a> origin)</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  {</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keyword">auto</span> current = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(origin);</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  stencil_type<typename SubImageView::value_type> stencil;</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a> = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type<typename SubImageView::value_type>::type</a>;</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  std::array<gil::point_t, 8> offsets(<a class="code" href="namespaceboost_1_1gil_1_1laplace__function.html#aabb7bfbc4ace7126a3c3c89717ce7a73">get_directed_offsets</a>());</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  <span class="keyword">typename</span> SubImageView::value_type zero_pixel;</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  static_fill(zero_pixel, 0);</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">for</span> (std::size_t index = 0; index < offsets.size(); ++index)</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">if</span> (index % 2 != 0)</div>
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|
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  {</div>
|
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  static_transform(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(origin.x + offsets[index].x, origin.y + offsets[index].y),</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  current, stencil[index], std::minus<channel_type>{});</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  {</div>
|
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  stencil[index] = zero_pixel;</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div>
|
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  }</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordflow">return</span> stencil;</div>
|
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  }</div>
|
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  </div>
|
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  Pixel reduce(<span class="keyword">const</span> stencil_type<Pixel>& stencil)</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  {</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a> = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type<Pixel>::type</a>;</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keyword">auto</span> result = []() {</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  Pixel zero_pixel;</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  static_fill(zero_pixel, <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a>(0));</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> zero_pixel;</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  }();</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  </div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">for</span> (std::size_t index : {1u, 3u, 5u, 7u})</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  {</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  static_transform(result, stencil[index], result, std::plus<channel_type>{});</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  }</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  Pixel delta_t_pixel;</div>
|
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  static_fill(delta_t_pixel, delta_t);</div>
|
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  static_transform(result, delta_t_pixel, result, std::multiplies<channel_type>{});</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  </div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">return</span> result;</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  }</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> };</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  </div>
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<div class="line"><a name="l00185"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1laplace__function_1_1stencil__9points__standard.html"> 185</a></span> <span class="keyword">struct </span><a class="code" href="structboost_1_1gil_1_1laplace__function_1_1stencil__9points__standard.html">stencil_9points_standard</a></div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> {</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordtype">double</span> delta_t = 0.125;</div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  </div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> SubImageView></div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  stencil_type<typename SubImageView::value_type> compute_laplace(SubImageView <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>,</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <a class="code" href="classboost_1_1gil_1_1point.html">point_t</a> origin)</div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  {</div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  stencil_type<typename SubImageView::value_type> stencil;</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keyword">auto</span> out = stencil.begin();</div>
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|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keyword">auto</span> current = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(origin);</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a> = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type<typename SubImageView::value_type>::type</a>;</div>
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|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  std::array<gil::point_t, 8> offsets(<a class="code" href="namespaceboost_1_1gil_1_1laplace__function.html#aabb7bfbc4ace7126a3c3c89717ce7a73">get_directed_offsets</a>());</div>
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|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">for</span> (<span class="keyword">auto</span> offset : offsets)</div>
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|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  {</div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  static_transform(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(origin.x + offset.x, origin.y + offset.y), current, *out++,</div>
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|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  std::minus<channel_type>{});</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  }</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  </div>
|
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">return</span> stencil;</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  </div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  Pixel reduce(<span class="keyword">const</span> stencil_type<Pixel>& stencil)</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  {</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keyword">using</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a> = <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type<Pixel>::type</a>;</div>
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<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keyword">auto</span> result = []() {</div>
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|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  Pixel zero_pixel;</div>
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|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  static_fill(zero_pixel, <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a>(0));</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">return</span> zero_pixel;</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }();</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">for</span> (std::size_t index : {1u, 3u, 5u, 7u})</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  {</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  static_transform(result, stencil[index], result, std::plus<channel_type>{});</div>
|
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  }</div>
|
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  </div>
|
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">for</span> (std::size_t index : {0u, 2u, 4u, 6u})</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  {</div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  Pixel half_pixel;</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  static_fill(half_pixel, <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type</a>(1 / 2.0));</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  static_transform(stencil[index], half_pixel, half_pixel,</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  std::multiplies<channel_type>{});</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  static_transform(result, half_pixel, result, std::plus<channel_type>{});</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  }</div>
|
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  </div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  Pixel delta_t_pixel;</div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  static_fill(delta_t_pixel, delta_t);</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  static_transform(result, delta_t_pixel, result, std::multiplies<channel_type>{});</div>
|
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  </div>
|
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">return</span> result;</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  }</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> };</div>
|
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> } <span class="comment">// namespace laplace_function</span></div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  </div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="keyword">namespace </span>brightness_function {</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="keyword">using</span> laplace_function::stencil_type;</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="keyword">struct </span>identity</div>
|
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> {</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">template</span> <<span class="keyword">typename</span> Pixel></div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  stencil_type<Pixel> operator()(<span class="keyword">const</span> stencil_type<Pixel>& stencil)</div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  {</div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">return</span> stencil;</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> };</div>
|
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  </div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment">// TODO: Figure out how to implement color gradient brightness, as it</span></div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment">// seems to need dx and dy using sobel or scharr kernels</span></div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  </div>
|
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="keyword">struct </span>rgb_luminance</div>
|
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> {</div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keyword">using</span> pixel_type = rgb32f_pixel_t;</div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  stencil_type<pixel_type> operator()(<span class="keyword">const</span> stencil_type<pixel_type>& stencil)</div>
|
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  {</div>
|
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  stencil_type<pixel_type> output;</div>
|
|
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  std::transform(stencil.begin(), stencil.end(), output.begin(), [](<span class="keyword">const</span> pixel_type& pixel) {</div>
|
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  float32_t luminance = 0.2126f * pixel[0] + 0.7152f * pixel[1] + 0.0722f * pixel[2];</div>
|
|
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  pixel_type result_pixel;</div>
|
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  static_fill(result_pixel, luminance);</div>
|
|
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  return result_pixel;</div>
|
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  });</div>
|
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">return</span> output;</div>
|
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<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  }</div>
|
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> };</div>
|
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  </div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> } <span class="comment">// namespace brightness_function</span></div>
|
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  </div>
|
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">enum class</span> matlab_connectivity</div>
|
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> {</div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  minimal,</div>
|
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  maximal</div>
|
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<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> };</div>
|
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<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  </div>
|
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="keyword">enum class</span> matlab_conduction_method</div>
|
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> {</div>
|
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  exponential,</div>
|
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  quadratic</div>
|
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<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> };</div>
|
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<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  </div>
|
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<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="keyword">template</span> <<span class="keyword">typename</span> InputView, <span class="keyword">typename</span> OutputView></div>
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<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="keywordtype">void</span> classic_anisotropic_diffusion(<span class="keyword">const</span> InputView& input, <span class="keyword">const</span> OutputView& output,</div>
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<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> num_iter, <span class="keywordtype">double</span> kappa)</div>
|
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<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> {</div>
|
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<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  anisotropic_diffusion(input, output, num_iter, laplace_function::stencil_5points{},</div>
|
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<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  brightness_function::identity{},</div>
|
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<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  conductivity::perona_malik_conductivity{kappa});</div>
|
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<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> }</div>
|
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<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  </div>
|
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="keyword">template</span> <<span class="keyword">typename</span> InputView, <span class="keyword">typename</span> OutputView></div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="keywordtype">void</span> matlab_anisotropic_diffusion(<span class="keyword">const</span> InputView& input, <span class="keyword">const</span> OutputView& output,</div>
|
|
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> num_iter, <span class="keywordtype">double</span> kappa,</div>
|
|
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  matlab_connectivity connectivity,</div>
|
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  matlab_conduction_method conduction_method)</div>
|
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> {</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">if</span> (connectivity == matlab_connectivity::minimal)</div>
|
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<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  {</div>
|
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">if</span> (conduction_method == matlab_conduction_method::exponential)</div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  {</div>
|
|
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  anisotropic_diffusion(input, output, num_iter, laplace_function::stencil_5points{},</div>
|
|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  brightness_function::identity{},</div>
|
|
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  conductivity::gaussian_conductivity{kappa});</div>
|
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  }</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (conduction_method == matlab_conduction_method::quadratic)</div>
|
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<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  {</div>
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<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  anisotropic_diffusion(input, output, num_iter, laplace_function::stencil_5points{},</div>
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|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  brightness_function::identity{},</div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  conductivity::gaussian_conductivity{kappa});</div>
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<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  }</div>
|
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<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">else</span></div>
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<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  {</div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"unhandled conduction method found"</span>);</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  }</div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  }</div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (connectivity == matlab_connectivity::maximal)</div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  {</div>
|
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordflow">if</span> (conduction_method == matlab_conduction_method::exponential)</div>
|
|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  {</div>
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<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  anisotropic_diffusion(input, output, num_iter, laplace_function::stencil_5points{},</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  brightness_function::identity{},</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  conductivity::gaussian_conductivity{kappa});</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  }</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (conduction_method == matlab_conduction_method::quadratic)</div>
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|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  {</div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  anisotropic_diffusion(input, output, num_iter, laplace_function::stencil_5points{},</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  brightness_function::identity{},</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  conductivity::gaussian_conductivity{kappa});</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  }</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">else</span></div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  {</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"unhandled conduction method found"</span>);</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  }</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">else</span></div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  {</div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">throw</span> std::logic_error(<span class="stringliteral">"unhandled connectivity found"</span>);</div>
|
|
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  }</div>
|
|
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> }</div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  </div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="keyword">template</span> <<span class="keyword">typename</span> InputView, <span class="keyword">typename</span> OutputView></div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="keywordtype">void</span> default_anisotropic_diffusion(<span class="keyword">const</span> InputView& input, <span class="keyword">const</span> OutputView& output,</div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> num_iter, <span class="keywordtype">double</span> kappa)</div>
|
|
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> {</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  anisotropic_diffusion(input, output, num_iter, laplace_function::stencil_9points_standard{},</div>
|
|
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  brightness_function::identity{}, conductivity::gaussian_conductivity{kappa});</div>
|
|
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> }</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  </div>
|
|
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="keyword">template</span> <<span class="keyword">typename</span> InputView, <span class="keyword">typename</span> OutputView,</div>
|
|
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keyword">typename</span> LaplaceStrategy = laplace_function::stencil_9points_standard,</div>
|
|
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keyword">typename</span> BrightnessFunction = brightness_function::identity,</div>
|
|
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <span class="keyword">typename</span> DiffusivityFunction = conductivity::gaussian_conductivity></div>
|
|
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="keywordtype">void</span> anisotropic_diffusion(<span class="keyword">const</span> InputView& input, <span class="keyword">const</span> OutputView& output, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> num_iter,</div>
|
|
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  LaplaceStrategy laplace, BrightnessFunction brightness,</div>
|
|
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  DiffusivityFunction diffusivity)</div>
|
|
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> {</div>
|
|
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keyword">using</span> input_pixel_type = <span class="keyword">typename</span> InputView::value_type;</div>
|
|
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keyword">using</span> pixel_type = <span class="keyword">typename</span> OutputView::value_type;</div>
|
|
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keyword">using</span> channel_type = <span class="keyword">typename</span> channel_type<pixel_type>::type;</div>
|
|
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keyword">using</span> computation_image = image<pixel_type>;</div>
|
|
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keyword">const</span> <span class="keyword">auto</span> width = input.width();</div>
|
|
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keyword">const</span> <span class="keyword">auto</span> height = input.height();</div>
|
|
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  <span class="keyword">const</span> point_t dims(width, height);</div>
|
|
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="keyword">const</span> <span class="keyword">auto</span> zero_pixel = []() {</div>
|
|
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  pixel_type pixel;</div>
|
|
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  static_fill(pixel, <span class="keyword">static_cast<</span>channel_type<span class="keyword">></span>(0));</div>
|
|
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  </div>
|
|
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">return</span> pixel;</div>
|
|
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  }();</div>
|
|
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  computation_image result_image(width + 2, height + 2, zero_pixel);</div>
|
|
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keyword">auto</span> result = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(result_image);</div>
|
|
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  computation_image scratch_result_image(width + 2, height + 2, zero_pixel);</div>
|
|
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keyword">auto</span> scratch_result = <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(scratch_result_image);</div>
|
|
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <a class="code" href="group___image_view_s_t_l_algorithms_transform_pixels.html#ga13302ec07014cc5731eac12af31dcbf2">transform_pixels</a>(input, <a class="code" href="group___image_view_transformations_subimage.html#ga0984936cff639dbc5644305b6c632487">subimage_view</a>(result, 1, 1, width, height),</div>
|
|
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  [](<span class="keyword">const</span> input_pixel_type& pixel) {</div>
|
|
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  pixel_type converted;</div>
|
|
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">for</span> (std::size_t i = 0; i < num_channels<pixel_type>{}; ++i)</div>
|
|
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  {</div>
|
|
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  converted[i] = pixel[i];</div>
|
|
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  }</div>
|
|
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keywordflow">return</span> converted;</div>
|
|
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  });</div>
|
|
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  </div>
|
|
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> iteration = 0; iteration < num_iter; ++iteration)</div>
|
|
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  {</div>
|
|
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">for</span> (std::ptrdiff_t relative_y = 0; relative_y < height; ++relative_y)</div>
|
|
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  {</div>
|
|
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  <span class="keywordflow">for</span> (std::ptrdiff_t relative_x = 0; relative_x < width; ++relative_x)</div>
|
|
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  {</div>
|
|
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  <span class="keyword">auto</span> x = relative_x + 1;</div>
|
|
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keyword">auto</span> y = relative_y + 1;</div>
|
|
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  <span class="keyword">auto</span> stencil = laplace.compute_laplace(result, point_t(x, y));</div>
|
|
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keyword">auto</span> brightness_stencil = brightness(stencil);</div>
|
|
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  laplace_function::stencil_type<pixel_type> diffusivity_stencil;</div>
|
|
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  std::transform(brightness_stencil.begin(), brightness_stencil.end(),</div>
|
|
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  diffusivity_stencil.begin(), diffusivity);</div>
|
|
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  laplace_function::stencil_type<pixel_type> product_stencil;</div>
|
|
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  std::transform(stencil.begin(), stencil.end(), diffusivity_stencil.begin(),</div>
|
|
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  product_stencil.begin(), [](pixel_type lhs, pixel_type rhs) {</div>
|
|
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  static_transform(lhs, rhs, lhs, std::multiplies<channel_type>{});</div>
|
|
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keywordflow">return</span> lhs;</div>
|
|
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  });</div>
|
|
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  static_transform(result(x, y), laplace.reduce(product_stencil),</div>
|
|
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  scratch_result(x, y), std::plus<channel_type>{});</div>
|
|
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  }</div>
|
|
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  }</div>
|
|
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keyword">using</span> <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a>;</div>
|
|
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <a class="code" href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">swap</a>(result, scratch_result);</div>
|
|
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  }</div>
|
|
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  </div>
|
|
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <a class="code" href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga15f144a6ff49ab684f8cbf58d9b7ced4">copy_pixels</a>(<a class="code" href="group___image_view_transformations_subimage.html#ga0984936cff639dbc5644305b6c632487">subimage_view</a>(result, 1, 1, width, height), output);</div>
|
|
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> }</div>
|
|
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  </div>
|
|
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> }} <span class="comment">// namespace boost::gil</span></div>
|
|
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  </div>
|
|
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="preprocessor">#endif</span></div>
|
|
</div><!-- fragment --></div><!-- contents -->
|
|
<div class="ttc" id="astructboost_1_1gil_1_1laplace__function_1_1stencil__9points__standard_html"><div class="ttname"><a href="structboost_1_1gil_1_1laplace__function_1_1stencil__9points__standard.html">boost::gil::laplace_function::stencil_9points_standard</a></div><div class="ttdoc">9 point stencil approximation of Laplacian</div><div class="ttdef"><b>Definition:</b> diffusion.hpp:185</div></div>
|
|
<div class="ttc" id="astructboost_1_1gil_1_1laplace__function_1_1stencil__5points_html"><div class="ttname"><a href="structboost_1_1gil_1_1laplace__function_1_1stencil__5points.html">boost::gil::laplace_function::stencil_5points</a></div><div class="ttdoc">5 point stencil approximation of Laplacian</div><div class="ttdef"><b>Definition:</b> diffusion.hpp:128</div></div>
|
|
<div class="ttc" id="agroup___packed_channel_reference_model_html_ga70de3c85964650c16afcc42c02bd5df9"><div class="ttname"><a href="group___packed_channel_reference_model.html#ga70de3c85964650c16afcc42c02bd5df9">std::swap</a></div><div class="ttdeci">void swap(boost::gil::packed_channel_reference< BF, FB, NB, M > const x, R &y)</div><div class="ttdoc">swap for packed_channel_reference</div><div class="ttdef"><b>Definition:</b> channel.hpp:529</div></div>
|
|
<div class="ttc" id="agroup___image_view_s_t_l_algorithms_transform_pixels_html_ga13302ec07014cc5731eac12af31dcbf2"><div class="ttname"><a href="group___image_view_s_t_l_algorithms_transform_pixels.html#ga13302ec07014cc5731eac12af31dcbf2">boost::gil::transform_pixels</a></div><div class="ttdeci">BOOST_FORCEINLINE F transform_pixels(const View1 &src, const View2 &dst, F fun)</div><div class="ttdoc">std::transform for image views</div><div class="ttdef"><b>Definition:</b> algorithm.hpp:1122</div></div>
|
|
<div class="ttc" id="agroup___image_view_s_t_l_algorithms_copy_pixels_html_ga15f144a6ff49ab684f8cbf58d9b7ced4"><div class="ttname"><a href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga15f144a6ff49ab684f8cbf58d9b7ced4">boost::gil::copy_pixels</a></div><div class="ttdeci">BOOST_FORCEINLINE void copy_pixels(const View1 &src, const View2 &dst)</div><div class="ttdoc">std::copy for image views</div><div class="ttdef"><b>Definition:</b> algorithm.hpp:288</div></div>
|
|
<div class="ttc" id="agroup___image_model_html_ga633557dbbff2d21c784b73412b47bb38"><div class="ttname"><a href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">boost::gil::view</a></div><div class="ttdeci">const image< Pixel, IsPlanar, Alloc >::view_t & view(image< Pixel, IsPlanar, Alloc > &img)</div><div class="ttdoc">Returns the non-constant-pixel view of an image.</div><div class="ttdef"><b>Definition:</b> image.hpp:549</div></div>
|
|
<div class="ttc" id="aclassboost_1_1gil_1_1point_html"><div class="ttname"><a href="classboost_1_1gil_1_1point.html">boost::gil::point< std::ptrdiff_t ></a></div></div>
|
|
<div class="ttc" id="anamespaceboost_1_1gil_1_1laplace__function_html_aabb7bfbc4ace7126a3c3c89717ce7a73"><div class="ttname"><a href="namespaceboost_1_1gil_1_1laplace__function.html#aabb7bfbc4ace7126a3c3c89717ce7a73">boost::gil::laplace_function::get_directed_offsets</a></div><div class="ttdeci">std::array< gil::point_t, 8 > get_directed_offsets()</div><div class="ttdoc">This function makes sure all Laplace functions enumerate values in the same order and direction.</div><div class="ttdef"><b>Definition:</b> diffusion.hpp:114</div></div>
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|
<div class="ttc" id="astructboost_1_1gil_1_1channel__type_html"><div class="ttname"><a href="structboost_1_1gil_1_1channel__type.html">boost::gil::channel_type</a></div><div class="ttdef"><b>Definition:</b> color_convert.hpp:31</div></div>
|
|
<div class="ttc" id="agroup___image_view_transformations_subimage_html_ga0984936cff639dbc5644305b6c632487"><div class="ttname"><a href="group___image_view_transformations_subimage.html#ga0984936cff639dbc5644305b6c632487">boost::gil::subimage_view</a></div><div class="ttdeci">View subimage_view(View const &src, typename View::point_t const &topleft, typename View::point_t const &dimensions)</div><div class="ttdef"><b>Definition:</b> image_view_factory.hpp:254</div></div>
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