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<div class="headertitle"><div class="title">morphology.hpp</div></div>
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<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">//</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment">// Copyright 2021 Prathamesh Tagore &lt;prathameshtagore@gmail.com&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">//</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// Use, modification and distribution are subject to the Boost Software License,</span></div>
<div class="line"><a id="l00005" 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>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// http://www.boost.org/LICENSE_1_0.txt)</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">//</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="preprocessor">#ifndef BOOST_GIL_IMAGE_PROCESSING_MORPHOLOGY_HPP</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#define BOOST_GIL_IMAGE_PROCESSING_MORPHOLOGY_HPP</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="preprocessor">#include &lt;boost/gil/image_processing/kernel.hpp&gt;</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;boost/gil/gray.hpp&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;boost/gil/image_processing/threshold.hpp&gt;</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span> </div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceboost.html">boost</a> { <span class="keyword">namespace </span>gil { <span class="keyword">namespace </span>detail {</div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="keyword">enum class</span> morphological_operation</div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span>{</div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span> dilation,</div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> erosion,</div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span>};</div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="foldopen" id="foldopen00040" data-start="{" data-end="}">
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"><a class="line" href="group___image_processing.html#ga11f3b19fce6240a867451a4e450cbeda"> 40</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group___image_processing.html#ga11f3b19fce6240a867451a4e450cbeda">morph_impl</a>(SrcView <span class="keyword">const</span>&amp; src_view, DstView <span class="keyword">const</span>&amp; dst_view, Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> morphological_operation identifier)</div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span>{</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> std::ptrdiff_t flip_ker_row, flip_ker_col, row_boundary, col_boundary;</div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="keyword">typename</span> <a class="code hl_struct" href="structboost_1_1gil_1_1channel__type.html">channel_type&lt;typename SrcView::value_type&gt;::type</a> target_element;</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">for</span> (std::ptrdiff_t view_row = 0; view_row &lt; src_view.height(); ++view_row)</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> {</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">for</span> (std::ptrdiff_t view_col = 0; view_col &lt; src_view.width(); ++view_col)</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> {</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> target_element = src_view(view_col, view_row);</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">for</span> (std::size_t kernel_row = 0; kernel_row &lt; kernel.size(); ++kernel_row)</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> {</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> flip_ker_row = kernel.size() - 1 - kernel_row; <span class="comment">// row index of flipped kernel</span></div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">for</span> (std::size_t kernel_col = 0; kernel_col &lt; kernel.size(); ++kernel_col)</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> {</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> flip_ker_col = kernel.size() - 1 - kernel_col; <span class="comment">// column index of flipped kernel</span></div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> <span class="comment">// We ensure that we consider only those pixels which are overlapped</span></div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// on a non-zero kernel_element as</span></div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">if</span> (kernel.at(flip_ker_row, flip_ker_col) == 0)</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> {</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">continue</span>;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="comment">// index of input signal, used for checking boundary</span></div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> row_boundary = view_row + (kernel.center_y() - flip_ker_row);</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> col_boundary = view_col + (kernel.center_x() - flip_ker_col);</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> </div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="comment">// ignore input samples which are out of bound</span></div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keywordflow">if</span> (row_boundary &gt;= 0 &amp;&amp; row_boundary &lt; src_view.height() &amp;&amp;</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> col_boundary &gt;= 0 &amp;&amp; col_boundary &lt; src_view.width())</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> {</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordflow">if</span> (identifier == morphological_operation::dilation)</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> {</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> target_element =</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> (std::max)(src_view(col_boundary, row_boundary)[0], target_element);</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> }</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (identifier == morphological_operation::erosion)</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> {</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> target_element =</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> (std::min)(src_view(col_boundary, row_boundary)[0], target_element);</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> }</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> }</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> }</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> dst_view(view_col, view_row) = target_element;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> }</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> }</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span>}</div>
</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="foldopen" id="foldopen00103" data-start="{" data-end="}">
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"><a class="line" href="group___image_processing.html#ga9146de40d1b6e239bfcd57b57297ee3a"> 103</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group___image_processing.html#ga9146de40d1b6e239bfcd57b57297ee3a">morph</a>(SrcView <span class="keyword">const</span>&amp; src_view, DstView <span class="keyword">const</span>&amp; dst_view, Kernel <span class="keyword">const</span>&amp; ker_mat,</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> morphological_operation identifier)</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span>{</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> BOOST_ASSERT(ker_mat.size() != 0 &amp;&amp; src_view.dimensions() == dst_view.dimensions());</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> gil_function_requires&lt;ImageViewConcept&lt;SrcView&gt;&gt;();</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> gil_function_requires&lt;MutableImageViewConcept&lt;DstView&gt;&gt;();</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> gil_function_requires&lt;ColorSpacesCompatibleConcept&lt;typename color_space_type&lt;SrcView&gt;::type,</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keyword">typename</span> color_space_type&lt;DstView&gt;::type&gt;&gt;();</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> </div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <a class="code hl_class" href="classboost_1_1gil_1_1image.html">gil::image&lt;typename DstView::value_type&gt;</a> intermediate_img(src_view.dimensions());</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; src_view.num_channels(); i++)</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> {</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <a class="code hl_function" href="group___image_processing.html#ga11f3b19fce6240a867451a4e450cbeda">morph_impl</a>(nth_channel_view(src_view, i), nth_channel_view(<a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(intermediate_img), i),</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> ker_mat, identifier);</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> }</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <a class="code hl_function" href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga0dff2d4420556f79de0b5a108378ff03">copy_pixels</a>(<a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(intermediate_img), dst_view);</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span>}</div>
</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DiffView&gt;</div>
<div class="foldopen" id="foldopen00132" data-start="{" data-end="}">
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"><a class="line" href="group___image_processing.html#gae19fddcf9139b320a98dcecaa9327f12"> 132</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group___image_processing.html#gae19fddcf9139b320a98dcecaa9327f12">difference_impl</a>(SrcView <span class="keyword">const</span>&amp; src_view1, SrcView <span class="keyword">const</span>&amp; src_view2, DiffView <span class="keyword">const</span>&amp; diff_view)</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span>{</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <span class="keywordflow">for</span> (std::ptrdiff_t view_row = 0; view_row &lt; src_view1.height(); ++view_row)</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="keywordflow">for</span> (std::ptrdiff_t view_col = 0; view_col &lt; src_view1.width(); ++view_col)</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> diff_view(view_col, view_row) =</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> src_view1(view_col, view_row) - src_view2(view_col, view_row);</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span>}</div>
</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DiffView&gt;</div>
<div class="foldopen" id="foldopen00148" data-start="{" data-end="}">
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"><a class="line" href="group___image_processing.html#gae69d7d13dc8f6eeb4922247669adfc0f"> 148</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="group___image_processing.html#gae69d7d13dc8f6eeb4922247669adfc0f">difference</a>(SrcView <span class="keyword">const</span>&amp; src_view1, SrcView <span class="keyword">const</span>&amp; src_view2, DiffView <span class="keyword">const</span>&amp; diff_view)</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span>{</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> gil_function_requires&lt;ImageViewConcept&lt;SrcView&gt;&gt;();</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> gil_function_requires&lt;MutableImageViewConcept&lt;DiffView&gt;&gt;();</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> gil_function_requires&lt;<a class="code hl_struct" href="structboost_1_1gil_1_1_color_spaces_compatible_concept.html">ColorSpacesCompatibleConcept</a>&lt;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">typename</span> color_space_type&lt;SrcView&gt;::type, <span class="keyword">typename</span> color_space_type&lt;DiffView&gt;::type&gt;&gt;();</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> </div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; src_view1.num_channels(); i++)</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> {</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <a class="code hl_function" href="group___image_processing.html#gae19fddcf9139b320a98dcecaa9327f12">difference_impl</a>(nth_channel_view(src_view1, i), nth_channel_view(src_view2, i),</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> nth_channel_view(diff_view, i));</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> }</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span>}</div>
</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span>} <span class="comment">// namespace detail</span></div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span><span class="keywordtype">void</span> dilate(SrcView <span class="keyword">const</span>&amp; src_view, IntOpView <span class="keyword">const</span>&amp; int_op_view, Kernel <span class="keyword">const</span>&amp; ker_mat,</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="keywordtype">int</span> iterations)</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span>{</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <a class="code hl_function" href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga0dff2d4420556f79de0b5a108378ff03">copy_pixels</a>(src_view, int_op_view);</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; iterations; ++i)</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> morph(int_op_view, int_op_view, ker_mat, detail::morphological_operation::dilation);</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span>}</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> </div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span><span class="keywordtype">void</span> erode(SrcView <span class="keyword">const</span>&amp; src_view, IntOpView <span class="keyword">const</span>&amp; int_op_view, Kernel <span class="keyword">const</span>&amp; ker_mat,</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> <span class="keywordtype">int</span> iterations)</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span>{</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> <a class="code hl_function" href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga0dff2d4420556f79de0b5a108378ff03">copy_pixels</a>(src_view, int_op_view);</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; iterations; ++i)</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> morph(int_op_view, int_op_view, ker_mat, detail::morphological_operation::erosion);</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span>}</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> </div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span><span class="keywordtype">void</span> opening(SrcView <span class="keyword">const</span>&amp; src_view, IntOpView <span class="keyword">const</span>&amp; int_op_view, Kernel <span class="keyword">const</span>&amp; ker_mat)</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span>{</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> erode(src_view, int_op_view, ker_mat, 1);</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> dilate(int_op_view, int_op_view, ker_mat, 1);</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span>}</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> </div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> IntOpView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span><span class="keywordtype">void</span> closing(SrcView <span class="keyword">const</span>&amp; src_view, IntOpView <span class="keyword">const</span>&amp; int_op_view, Kernel <span class="keyword">const</span>&amp; ker_mat)</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span>{</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> dilate(src_view, int_op_view, ker_mat, 1);</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> erode(int_op_view, int_op_view, ker_mat, 1);</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span>}</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span><span class="keywordtype">void</span> morphological_gradient(SrcView <span class="keyword">const</span>&amp; src_view, DstView <span class="keyword">const</span>&amp; dst_view, Kernel <span class="keyword">const</span>&amp; ker_mat)</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span>{</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> <span class="keyword">using namespace </span>boost::gil;</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> <a class="code hl_class" href="classboost_1_1gil_1_1image.html">gil::image&lt;typename DstView::value_type&gt;</a> int_dilate(src_view.dimensions()),</div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> int_erode(src_view.dimensions());</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> dilate(src_view, <a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_dilate), ker_mat, 1);</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> erode(src_view, <a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_erode), ker_mat, 1);</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <a class="code hl_function" href="group___image_processing.html#gae69d7d13dc8f6eeb4922247669adfc0f">difference</a>(<a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_dilate), <a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_erode), dst_view);</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span>}</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> </div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span><span class="keywordtype">void</span> top_hat(SrcView <span class="keyword">const</span>&amp; src_view, DstView <span class="keyword">const</span>&amp; dst_view, Kernel <span class="keyword">const</span>&amp; ker_mat)</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span>{</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> <span class="keyword">using namespace </span>boost::gil;</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> <a class="code hl_class" href="classboost_1_1gil_1_1image.html">gil::image&lt;typename DstView::value_type&gt;</a> int_opening(src_view.dimensions());</div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> opening(src_view, <a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_opening), ker_mat);</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> <a class="code hl_function" href="group___image_processing.html#gae69d7d13dc8f6eeb4922247669adfc0f">difference</a>(src_view, <a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_opening), dst_view);</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span>}</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> DstView, <span class="keyword">typename</span> Kernel&gt;</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span><span class="keywordtype">void</span> black_hat(SrcView <span class="keyword">const</span>&amp; src_view, DstView <span class="keyword">const</span>&amp; dst_view, Kernel <span class="keyword">const</span>&amp; ker_mat)</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span>{</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> <span class="keyword">using namespace </span>boost::gil;</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> <a class="code hl_class" href="classboost_1_1gil_1_1image.html">gil::image&lt;typename DstView::value_type&gt;</a> int_closing(src_view.dimensions());</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> closing(src_view, <a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_closing), ker_mat);</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> <a class="code hl_function" href="group___image_processing.html#gae69d7d13dc8f6eeb4922247669adfc0f">difference</a>(<a class="code hl_function" href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">view</a>(int_closing), src_view, dst_view);</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span>}</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span>}} <span class="comment">// namespace boost::gil</span></div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span><span class="preprocessor">#endif </span><span class="comment">// BOOST_GIL_IMAGE_PROCESSING_MORPHOLOGY_HPP</span></div>
<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:43</div></div>
<div class="ttc" id="agroup___image_model_html_ga11e52868409ba2d52a93213ee39f4fde"><div class="ttname"><a href="group___image_model.html#ga11e52868409ba2d52a93213ee39f4fde">boost::gil::view</a></div><div class="ttdeci">auto view(image&lt; Pixel, IsPlanar, Alloc &gt; &amp;img) -&gt; typename image&lt; Pixel, IsPlanar, Alloc &gt;::view_t const &amp;</div><div class="ttdoc">Returns the non-constant-pixel view of an image.</div><div class="ttdef"><b>Definition</b> image.hpp:565</div></div>
<div class="ttc" id="agroup___image_processing_html_ga11f3b19fce6240a867451a4e450cbeda"><div class="ttname"><a href="group___image_processing.html#ga11f3b19fce6240a867451a4e450cbeda">boost::gil::detail::morph_impl</a></div><div class="ttdeci">void morph_impl(SrcView const &amp;src_view, DstView const &amp;dst_view, Kernel const &amp;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:40</div></div>
<div class="ttc" id="agroup___image_processing_html_ga9146de40d1b6e239bfcd57b57297ee3a"><div class="ttname"><a href="group___image_processing.html#ga9146de40d1b6e239bfcd57b57297ee3a">boost::gil::detail::morph</a></div><div class="ttdeci">void morph(SrcView const &amp;src_view, DstView const &amp;dst_view, Kernel const &amp;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:103</div></div>
<div class="ttc" id="agroup___image_processing_html_gae19fddcf9139b320a98dcecaa9327f12"><div class="ttname"><a href="group___image_processing.html#gae19fddcf9139b320a98dcecaa9327f12">boost::gil::detail::difference_impl</a></div><div class="ttdeci">void difference_impl(SrcView const &amp;src_view1, SrcView const &amp;src_view2, DiffView const &amp;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:132</div></div>
<div class="ttc" id="agroup___image_processing_html_gae69d7d13dc8f6eeb4922247669adfc0f"><div class="ttname"><a href="group___image_processing.html#gae69d7d13dc8f6eeb4922247669adfc0f">boost::gil::detail::difference</a></div><div class="ttdeci">void difference(SrcView const &amp;src_view1, SrcView const &amp;src_view2, DiffView const &amp;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:148</div></div>
<div class="ttc" id="agroup___image_view_s_t_l_algorithms_copy_pixels_html_ga0dff2d4420556f79de0b5a108378ff03"><div class="ttname"><a href="group___image_view_s_t_l_algorithms_copy_pixels.html#ga0dff2d4420556f79de0b5a108378ff03">boost::gil::copy_pixels</a></div><div class="ttdeci">BOOST_FORCEINLINE void copy_pixels(const View1 &amp;src, const View2 &amp;dst)</div><div class="ttdoc">std::copy for image views</div><div class="ttdef"><b>Definition</b> algorithm.hpp:292</div></div>
<div class="ttc" id="anamespaceboost_html"><div class="ttname"><a href="namespaceboost.html">boost</a></div><div class="ttdoc">defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)</div><div class="ttdef"><b>Definition</b> algorithm.hpp:36</div></div>
<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:61</div></div>
<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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