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<div class="title">morphology.hpp</div> </div>
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<div class="contents">
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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 2021 Prathamesh Tagore <prathameshtagore@gmail.com></span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</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="l00005"></a><span class="lineno"> 5</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="l00006"></a><span class="lineno"> 6</span> <span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>  </div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#ifndef BOOST_GIL_IMAGE_PROCESSING_MORPHOLOGY_HPP</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define BOOST_GIL_IMAGE_PROCESSING_MORPHOLOGY_HPP</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>  </div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include <boost/gil/image_processing/kernel.hpp></span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include <boost/gil/gray.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/image_processing/threshold.hpp></span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>  </div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="keyword">namespace </span>boost</div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> {</div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">namespace </span>gil</div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> {</div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">namespace </span>detail</div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> {</div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">enum class</span> morphological_operation</div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  dilation,</div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  erosion,</div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> };</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="l00042"></a><span class="lineno"> 42</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="group___image_processing.html#gabf43b4d47f9db3431a5307242e555173"> 43</a></span> <span class="keywordtype">void</span> <a class="code" href="group___image_processing.html#gabf43b4d47f9db3431a5307242e555173">morph_impl</a>(SrcView <span class="keyword">const</span>& src_view, DstView <span class="keyword">const</span>& dst_view, Kernel <span class="keyword">const</span>& kernel,</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  morphological_operation identifier)</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> {</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  std::ptrdiff_t flip_ker_row, flip_ker_col, row_boundary, col_boundary;</div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keyword">typename</span> <a class="code" href="structboost_1_1gil_1_1channel__type.html">channel_type<typename SrcView::value_type>::type</a> target_element;</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">for</span> (std::ptrdiff_t view_row = 0; view_row < src_view.height(); ++view_row)</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  {</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">for</span> (std::ptrdiff_t view_col = 0; view_col < src_view.width(); ++view_col)</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  target_element = src_view(view_col, view_row);</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">for</span> (std::size_t kernel_row = 0; kernel_row < kernel.size(); ++kernel_row)</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  {</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  flip_ker_row = kernel.size() - 1 - kernel_row; <span class="comment">// row index of flipped kernel</span></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>  <span class="keywordflow">for</span> (std::size_t kernel_col = 0; kernel_col < kernel.size(); ++kernel_col)</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  {</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  flip_ker_col = kernel.size() - 1 - kernel_col; <span class="comment">// column index of flipped kernel</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>  <span class="comment">// We ensure that we consider only those pixels which are overlapped</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// on a non-zero kernel_element as</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">if</span> (kernel.at(flip_ker_row, flip_ker_col) == 0)</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  {</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordflow">continue</span>;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  }</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="comment">// index of input signal, used for checking boundary</span></div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  row_boundary = view_row + (kernel.center_y() - flip_ker_row);</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  col_boundary = view_col + (kernel.center_x() - flip_ker_col);</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  </div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="comment">// ignore input samples which are out of bound</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">if</span> (row_boundary >= 0 && row_boundary < src_view.height() &&</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  col_boundary >= 0 && col_boundary < src_view.width())</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>  </div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  <span class="keywordflow">if</span> (identifier == morphological_operation::dilation)</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>  target_element =</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  (std::max)(src_view(col_boundary, row_boundary)[0], target_element);</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="keywordflow">else</span> <span class="keywordflow">if</span> (identifier == morphological_operation::erosion)</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  {</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  target_element =</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  (std::min)(src_view(col_boundary, row_boundary)[0], target_element);</div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  }</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  }</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  }</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  dst_view(view_col, view_row) = target_element;</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> }</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="l00105"></a><span class="lineno"> 105</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="group___image_processing.html#ga8b8a87747a80f42b41a320b58ce3e1a2"> 106</a></span> <span class="keywordtype">void</span> <a class="code" href="group___image_processing.html#ga8b8a87747a80f42b41a320b58ce3e1a2">morph</a>(SrcView <span class="keyword">const</span>& src_view, DstView <span class="keyword">const</span>& dst_view, Kernel <span class="keyword">const</span>& ker_mat,</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  morphological_operation identifier)</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> {</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  BOOST_ASSERT(ker_mat.size() != 0 && src_view.dimensions() == dst_view.dimensions());</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  gil_function_requires<ImageViewConcept<SrcView>>();</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  gil_function_requires<MutableImageViewConcept<DstView>>();</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  </div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  gil_function_requires<ColorSpacesCompatibleConcept<typename color_space_type<SrcView>::type,</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="keyword">typename</span> color_space_type<DstView>::type>>();</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>  <a class="code" href="classboost_1_1gil_1_1image.html">gil::image<typename DstView::value_type></a> intermediate_img(src_view.dimensions());</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  </div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">for</span> (std::size_t i = 0; i < src_view.num_channels(); i++)</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>  <a class="code" href="group___image_processing.html#gabf43b4d47f9db3431a5307242e555173">morph_impl</a>(<a class="code" href="group___image_view_transformations_nth_channel.html#gad976e8c51016d9cdbb47d57ab2ce8717">nth_channel_view</a>(src_view, i), <a class="code" href="group___image_view_transformations_nth_channel.html#gad976e8c51016d9cdbb47d57ab2ce8717">nth_channel_view</a>(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(intermediate_img), i),</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  ker_mat, identifier);</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="l00123"></a><span class="lineno"> 123</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_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(intermediate_img), dst_view);</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> }</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  </div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DiffView></div>
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<div class="line"><a name="l00135"></a><span class="lineno"><a class="line" href="group___image_processing.html#ga66625772f357c3dd401cb606364deabd"> 135</a></span> <span class="keywordtype">void</span> <a class="code" href="group___image_processing.html#ga66625772f357c3dd401cb606364deabd">difference_impl</a>(SrcView <span class="keyword">const</span>& src_view1, SrcView <span class="keyword">const</span>& src_view2, DiffView <span class="keyword">const</span>& diff_view)</div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> {</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">for</span> (std::ptrdiff_t view_row = 0; view_row < src_view1.height(); ++view_row)</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordflow">for</span> (std::ptrdiff_t view_col = 0; view_col < src_view1.width(); ++view_col)</div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  diff_view(view_col, view_row) =</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  src_view1(view_col, view_row) - src_view2(view_col, view_row);</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> }</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  </div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DiffView></div>
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<div class="line"><a name="l00151"></a><span class="lineno"><a class="line" href="group___image_processing.html#ga4ab8ac2b7e6922f065c2179d86fb546f"> 151</a></span> <span class="keywordtype">void</span> <a class="code" href="group___image_processing.html#ga4ab8ac2b7e6922f065c2179d86fb546f">difference</a>(SrcView <span class="keyword">const</span>& src_view1, SrcView <span class="keyword">const</span>& src_view2, DiffView <span class="keyword">const</span>& diff_view)</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>  gil_function_requires<ImageViewConcept<SrcView>>();</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  gil_function_requires<MutableImageViewConcept<DiffView>>();</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>  gil_function_requires<<a class="code" href="structboost_1_1gil_1_1_color_spaces_compatible_concept.html">ColorSpacesCompatibleConcept</a><</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keyword">typename</span> color_space_type<SrcView>::type, <span class="keyword">typename</span> color_space_type<DiffView>::type>>();</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  </div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">for</span> (std::size_t i = 0; i < src_view1.num_channels(); i++)</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  {</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <a class="code" href="group___image_processing.html#ga66625772f357c3dd401cb606364deabd">difference_impl</a>(<a class="code" href="group___image_view_transformations_nth_channel.html#gad976e8c51016d9cdbb47d57ab2ce8717">nth_channel_view</a>(src_view1, i), <a class="code" href="group___image_view_transformations_nth_channel.html#gad976e8c51016d9cdbb47d57ab2ce8717">nth_channel_view</a>(src_view2, i),</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <a class="code" href="group___image_view_transformations_nth_channel.html#gad976e8c51016d9cdbb47d57ab2ce8717">nth_channel_view</a>(diff_view, i));</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div>
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<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> }</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> } <span class="comment">// namespace detail</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="l00179"></a><span class="lineno"> 179</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="keywordtype">void</span> dilate(SrcView <span class="keyword">const</span>& src_view, IntOpView <span class="keyword">const</span>& int_op_view, Kernel <span class="keyword">const</span>& ker_mat,</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordtype">int</span> iterations)</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> {</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <a class="code" href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga15f144a6ff49ab684f8cbf58d9b7ced4">copy_pixels</a>(src_view, int_op_view);</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < iterations; ++i)</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <a class="code" href="group___image_processing.html#ga8b8a87747a80f42b41a320b58ce3e1a2">morph</a>(int_op_view, int_op_view, ker_mat, detail::morphological_operation::dilation);</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>  </div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="keywordtype">void</span> erode(SrcView <span class="keyword">const</span>& src_view, IntOpView <span class="keyword">const</span>& int_op_view, Kernel <span class="keyword">const</span>& ker_mat,</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordtype">int</span> iterations)</div>
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<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>  <a class="code" href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga15f144a6ff49ab684f8cbf58d9b7ced4">copy_pixels</a>(src_view, int_op_view);</div>
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<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < iterations; ++i)</div>
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<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <a class="code" href="group___image_processing.html#ga8b8a87747a80f42b41a320b58ce3e1a2">morph</a>(int_op_view, int_op_view, ker_mat, detail::morphological_operation::erosion);</div>
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> }</div>
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  </div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="keywordtype">void</span> opening(SrcView <span class="keyword">const</span>& src_view, IntOpView <span class="keyword">const</span>& int_op_view, Kernel <span class="keyword">const</span>& ker_mat)</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>  erode(src_view, int_op_view, ker_mat, 1);</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  dilate(int_op_view, int_op_view, ker_mat, 1);</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> }</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  </div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="keywordtype">void</span> closing(SrcView <span class="keyword">const</span>& src_view, IntOpView <span class="keyword">const</span>& int_op_view, Kernel <span class="keyword">const</span>& ker_mat)</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> {</div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  dilate(src_view, int_op_view, ker_mat, 1);</div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  erode(int_op_view, int_op_view, ker_mat, 1);</div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> }</div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  </div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="keywordtype">void</span> morphological_gradient(SrcView <span class="keyword">const</span>& src_view, DstView <span class="keyword">const</span>& dst_view, Kernel <span class="keyword">const</span>& ker_mat)</div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> {</div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="keyword">using namespace </span>boost::gil;</div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  gil::image<typename DstView::value_type> int_dilate(src_view.dimensions()),</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  int_erode(src_view.dimensions());</div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  dilate(src_view, <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_dilate), ker_mat, 1);</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  erode(src_view, <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_erode), ker_mat, 1);</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <a class="code" href="group___image_processing.html#ga4ab8ac2b7e6922f065c2179d86fb546f">difference</a>(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_dilate), <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_erode), dst_view);</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div>
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<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  </div>
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<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="keywordtype">void</span> top_hat(SrcView <span class="keyword">const</span>& src_view, DstView <span class="keyword">const</span>& dst_view, Kernel <span class="keyword">const</span>& ker_mat)</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>  <span class="keyword">using namespace </span>boost::gil;</div>
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<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  gil::image<typename DstView::value_type> int_opening(src_view.dimensions());</div>
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<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  opening(src_view, <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_opening), ker_mat);</div>
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<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <a class="code" href="group___image_processing.html#ga4ab8ac2b7e6922f065c2179d86fb546f">difference</a>(src_view, <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_opening), dst_view);</div>
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<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> }</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="l00291"></a><span class="lineno"> 291</span> <span class="keyword">template</span> <<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel></div>
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<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="keywordtype">void</span> black_hat(SrcView <span class="keyword">const</span>& src_view, DstView <span class="keyword">const</span>& dst_view, Kernel <span class="keyword">const</span>& ker_mat)</div>
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<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> {</div>
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<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keyword">using namespace </span>boost::gil;</div>
|
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<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  gil::image<typename DstView::value_type> int_closing(src_view.dimensions());</div>
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<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  closing(src_view, <a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_closing), ker_mat);</div>
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<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <a class="code" href="group___image_processing.html#ga4ab8ac2b7e6922f065c2179d86fb546f">difference</a>(<a class="code" href="group___image_model.html#ga633557dbbff2d21c784b73412b47bb38">view</a>(int_closing), src_view, dst_view);</div>
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<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> }</div>
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<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> }} <span class="comment">// namespace boost::gil</span></div>
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<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="preprocessor">#endif // BOOST_GIL_IMAGE_PROCESSING_MORPHOLOGY_HPP</span></div>
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</div><!-- fragment --></div><!-- contents -->
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<div class="ttc" id="aclassboost_1_1gil_1_1image_html"><div class="ttname"><a href="classboost_1_1gil_1_1image.html">boost::gil::image</a></div><div class="ttdoc">container interface over image view. Models ImageConcept, PixelBasedConcept</div><div class="ttdef"><b>Definition:</b> image.hpp:42</div></div>
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<div class="ttc" id="agroup___image_processing_html_ga4ab8ac2b7e6922f065c2179d86fb546f"><div class="ttname"><a href="group___image_processing.html#ga4ab8ac2b7e6922f065c2179d86fb546f">boost::gil::detail::difference</a></div><div class="ttdeci">void difference(SrcView const &src_view1, SrcView const &src_view2, DiffView const &diff_view)</div><div class="ttdoc">Passes parameter values to the function 'difference_impl' alongwith individual channel views of input...</div><div class="ttdef"><b>Definition:</b> morphology.hpp:151</div></div>
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<div class="ttc" id="agroup___image_processing_html_ga8b8a87747a80f42b41a320b58ce3e1a2"><div class="ttname"><a href="group___image_processing.html#ga8b8a87747a80f42b41a320b58ce3e1a2">boost::gil::detail::morph</a></div><div class="ttdeci">void morph(SrcView const &src_view, DstView const &dst_view, Kernel const &ker_mat, morphological_operation identifier)</div><div class="ttdoc">Checks feasibility of the desired operation and passes parameter values to the function morph_impl al...</div><div class="ttdef"><b>Definition:</b> morphology.hpp:106</div></div>
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<div class="ttc" id="agroup___image_view_transformations_nth_channel_html_gad976e8c51016d9cdbb47d57ab2ce8717"><div class="ttname"><a href="group___image_view_transformations_nth_channel.html#gad976e8c51016d9cdbb47d57ab2ce8717">boost::gil::nth_channel_view</a></div><div class="ttdeci">nth_channel_view_type< View >::type nth_channel_view(const View &src, int n)</div><div class="ttdef"><b>Definition:</b> image_view_factory.hpp:418</div></div>
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<div class="ttc" id="astructboost_1_1gil_1_1_color_spaces_compatible_concept_html"><div class="ttname"><a href="structboost_1_1gil_1_1_color_spaces_compatible_concept.html">boost::gil::ColorSpacesCompatibleConcept</a></div><div class="ttdoc">Two color spaces are compatible if they are the same.</div><div class="ttdef"><b>Definition:</b> color.hpp:60</div></div>
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<div class="ttc" id="agroup___image_processing_html_gabf43b4d47f9db3431a5307242e555173"><div class="ttname"><a href="group___image_processing.html#gabf43b4d47f9db3431a5307242e555173">boost::gil::detail::morph_impl</a></div><div class="ttdeci">void morph_impl(SrcView const &src_view, DstView const &dst_view, Kernel const &kernel, morphological_operation identifier)</div><div class="ttdoc">Implements morphological operations at pixel level.This function compares neighbouring pixel values a...</div><div class="ttdef"><b>Definition:</b> morphology.hpp:43</div></div>
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<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>
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<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>
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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>
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<div class="ttc" id="agroup___image_processing_html_ga66625772f357c3dd401cb606364deabd"><div class="ttname"><a href="group___image_processing.html#ga66625772f357c3dd401cb606364deabd">boost::gil::detail::difference_impl</a></div><div class="ttdeci">void difference_impl(SrcView const &src_view1, SrcView const &src_view2, DiffView const &diff_view)</div><div class="ttdoc">Calculates the difference between pixel values of first image_view and second image_view.</div><div class="ttdef"><b>Definition:</b> morphology.hpp:135</div></div>
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