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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 2005-2007 Adobe Systems Incorporated</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment">// Copyright 2019 Miral Shah &lt;miralshah2211@gmail.com&gt;</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment">// Copyright 2019-2021 Pranam Lashkari &lt;plashkari628@gmail.com&gt;</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment">//</span></div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment">// Distributed under the Boost Software License, Version 1.0</span></div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment">// See accompanying file LICENSE_1_0.txt or copy at</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment">// http://www.boost.org/LICENSE_1_0.txt</span></div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment">//</span></div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#ifndef BOOST_GIL_IMAGE_PROCESSING_CONVOLVE_HPP</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#define BOOST_GIL_IMAGE_PROCESSING_CONVOLVE_HPP</span></div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span> </div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;boost/gil/image_processing/kernel.hpp&gt;</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include &lt;boost/gil/algorithm.hpp&gt;</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include &lt;boost/gil/image_view_factory.hpp&gt;</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include &lt;boost/gil/metafunctions.hpp&gt;</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include &lt;boost/gil/pixel_numeric_operations.hpp&gt;</span></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><span class="preprocessor">#include &lt;boost/assert.hpp&gt;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include &lt;algorithm&gt;</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include &lt;cstddef&gt;</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include &lt;functional&gt;</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span><span class="preprocessor">#include &lt;type_traits&gt;</span></div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespaceboost.html">boost</a> { <span class="keyword">namespace </span>gil {</div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="comment">// 2D spatial separable convolutions and cross-correlations</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="keyword">namespace </span>detail {</div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> </div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="keyword">template</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span>&lt;</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">typename</span> PixelAccum,</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keyword">typename</span> SrcView,</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">typename</span> Kernel,</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keyword">typename</span> DstView,</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keyword">typename</span> Correlator</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span>&gt;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span><span class="keywordtype">void</span> correlate_rows_impl(</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> boundary_option option,</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> Correlator correlator)</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span>{</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> BOOST_ASSERT(src_view.dimensions() == dst_view.dimensions());</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> BOOST_ASSERT(kernel.size() != 0);</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="keywordflow">if</span>(kernel.size() == 1)</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> {</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> <span class="comment">// Reduces to a multiplication</span></div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> view_multiplies_scalar&lt;PixelAccum&gt;(src_view, *kernel.begin(), dst_view);</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> }</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> <span class="keyword">using </span>src_pixel_ref_t = <span class="keyword">typename</span> pixel_proxy&lt;typename SrcView::value_type&gt;::type;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keyword">using </span>dst_pixel_ref_t = <span class="keyword">typename</span> pixel_proxy&lt;typename DstView::value_type&gt;::type;</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">using </span>x_coord_t = <span class="keyword">typename</span> SrcView::x_coord_t;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">using </span>y_coord_t = <span class="keyword">typename</span> SrcView::y_coord_t;</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> x_coord_t <span class="keyword">const</span> width = src_view.width();</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> y_coord_t <span class="keyword">const</span> height = src_view.height();</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">if</span> (width == 0)</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <span class="keywordflow">return</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> PixelAccum acc_zero;</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> pixel_zeros_t&lt;PixelAccum&gt;()(acc_zero);</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">if</span> (option == boundary_option::output_ignore || option == boundary_option::output_zero)</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> <span class="keyword">typename</span> DstView::value_type dst_zero;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> pixel_assigns_t&lt;PixelAccum, dst_pixel_ref_t&gt;()(acc_zero, dst_zero);</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <span class="keywordflow">if</span> (width &lt; <span class="keyword">static_cast&lt;</span>x_coord_t<span class="keyword">&gt;</span>(kernel.size()))</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> {</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> <span class="keywordflow">if</span> (option == boundary_option::output_zero)</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <a class="code hl_function" href="group___image_view_s_t_l_algorithms_fill_pixels.html#gad940ed7e69c241f2a16899a1bb0572ba">fill_pixels</a>(dst_view, dst_zero);</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> }</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> {</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> std::vector&lt;PixelAccum&gt; buffer(width);</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="keywordflow">for</span> (y_coord_t y = 0; y &lt; height; ++y)</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> {</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> assign_pixels(src_view.row_begin(y), src_view.row_end(y), &amp;buffer.front());</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">typename</span> DstView::x_iterator it_dst = dst_view.row_begin(y);</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> <span class="keywordflow">if</span> (option == boundary_option::output_zero)</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> std::fill_n(it_dst, kernel.left_size(), dst_zero);</div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> it_dst += kernel.left_size();</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> correlator(&amp;buffer.front(), &amp;buffer.front() + width + 1 - kernel.size(),</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> kernel.begin(), it_dst);</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> it_dst += width + 1 - kernel.size();</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">if</span> (option == boundary_option::output_zero)</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> std::fill_n(it_dst, kernel.right_size(), dst_zero);</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> }</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> }</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">else</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> {</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> std::vector&lt;PixelAccum&gt; buffer(width + kernel.size() - 1);</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> <span class="keywordflow">for</span> (y_coord_t y = 0; y &lt; height; ++y)</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> {</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> PixelAccum *it_buffer = &amp;buffer.front();</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="keywordflow">if</span> (option == boundary_option::extend_padded)</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> {</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> assign_pixels(</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> src_view.row_begin(y) - kernel.left_size(),</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> src_view.row_end(y) + kernel.right_size(),</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> it_buffer);</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> }</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (option == boundary_option::extend_zero)</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> {</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> std::fill_n(it_buffer, kernel.left_size(), acc_zero);</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> it_buffer += kernel.left_size();</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> assign_pixels(src_view.row_begin(y), src_view.row_end(y), it_buffer);</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> it_buffer += width;</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> std::fill_n(it_buffer, kernel.right_size(), acc_zero);</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> }</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span> (option == boundary_option::extend_constant)</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> {</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> PixelAccum filler;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> pixel_assigns_t&lt;src_pixel_ref_t, PixelAccum&gt;()(*src_view.row_begin(y), filler);</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> std::fill_n(it_buffer, kernel.left_size(), filler);</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> it_buffer += kernel.left_size();</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> assign_pixels(src_view.row_begin(y), src_view.row_end(y), it_buffer);</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> it_buffer += width;</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> pixel_assigns_t&lt;src_pixel_ref_t, PixelAccum&gt;()(src_view.row_end(y)[-1], filler);</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> std::fill_n(it_buffer, kernel.right_size(), filler);</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> }</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> </div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> correlator(</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> &amp;buffer.front(), &amp;buffer.front() + width,</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> kernel.begin(),</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> dst_view.row_begin(y));</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> }</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>}</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum&gt;</div>
<div class="foldopen" id="foldopen00159" data-start="{" data-end="};">
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"><a class="line" href="classboost_1_1gil_1_1detail_1_1correlator__n.html"> 159</a></span><span class="keyword">class </span><a class="code hl_class" href="classboost_1_1gil_1_1detail_1_1correlator__n.html">correlator_n</a></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><span class="keyword">public</span>:</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> <a class="code hl_class" href="classboost_1_1gil_1_1detail_1_1correlator__n.html">correlator_n</a>(std::size_t <a class="code hl_struct" href="structboost_1_1gil_1_1size.html">size</a>) : size_(<a class="code hl_struct" href="structboost_1_1gil_1_1size.html">size</a>) {}</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcIterator, <span class="keyword">typename</span> KernelIterator, <span class="keyword">typename</span> DstIterator&gt;</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="keywordtype">void</span> operator()(</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> SrcIterator src_begin,</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> SrcIterator src_end,</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> KernelIterator kernel_begin,</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> DstIterator dst_begin)</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> {</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> correlate_pixels_n&lt;PixelAccum&gt;(src_begin, src_end, kernel_begin, size_, dst_begin);</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> }</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span><span class="keyword">private</span>:</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> std::size_t size_{0};</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span>};</div>
</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span><span class="keyword">template</span> &lt;std::<span class="keywordtype">size_t</span> Size, <span class="keyword">typename</span> PixelAccum&gt;</div>
<div class="foldopen" id="foldopen00182" data-start="{" data-end="};">
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"><a class="line" href="structboost_1_1gil_1_1detail_1_1correlator__k.html"> 182</a></span><span class="keyword">struct </span><a class="code hl_struct" href="structboost_1_1gil_1_1detail_1_1correlator__k.html">correlator_k</a></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> <span class="keyword">template</span> &lt;<span class="keyword">typename</span> SrcIterator, <span class="keyword">typename</span> KernelIterator, <span class="keyword">typename</span> DstIterator&gt;</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> <span class="keywordtype">void</span> operator()(</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> SrcIterator src_begin,</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> SrcIterator src_end,</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> KernelIterator kernel_begin,</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> DstIterator dst_begin)</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> {</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> correlate_pixels_k&lt;Size, PixelAccum&gt;(src_begin, src_end, kernel_begin, dst_begin);</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> }</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span>};</div>
</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> </div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span>} <span class="comment">// namespace detail</span></div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span><span class="keywordtype">void</span> correlate_rows(</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span>{</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> detail::correlate_rows_impl&lt;PixelAccum&gt;(</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> src_view, kernel, dst_view, option, <a class="code hl_class" href="classboost_1_1gil_1_1detail_1_1correlator__n.html">detail::correlator_n&lt;PixelAccum&gt;</a>(kernel.size()));</div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span>}</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> </div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span><span class="keywordtype">void</span> correlate_cols(</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span>{</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> correlate_rows&lt;PixelAccum&gt;(</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> transposed_view(src_view), kernel, transposed_view(dst_view), option);</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span>}</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> </div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span><span class="keywordtype">void</span> convolve_rows(</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span>{</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> correlate_rows&lt;PixelAccum&gt;(src_view, reverse_kernel(kernel), dst_view, option);</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span>}</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span><span class="keywordtype">void</span> convolve_cols(</div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span>{</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> convolve_rows&lt;PixelAccum&gt;(</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> transposed_view(src_view), kernel, transposed_view(dst_view), option);</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span>}</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span><span class="keywordtype">void</span> correlate_rows_fixed(</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span>{</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> <span class="keyword">using </span>correlator = detail::correlator_k&lt;Kernel::static_size, PixelAccum&gt;;</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> detail::correlate_rows_impl&lt;PixelAccum&gt;(src_view, kernel, dst_view, option, correlator{});</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span>}</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> </div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum,<span class="keyword">typename</span> SrcView,<span class="keyword">typename</span> Kernel,<span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span><span class="keywordtype">void</span> correlate_cols_fixed(</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span>{</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> correlate_rows_fixed&lt;PixelAccum&gt;(</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> transposed_view(src_view), kernel, transposed_view(dst_view), option);</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span>}</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> </div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span><span class="keywordtype">void</span> convolve_rows_fixed(</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span>{</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> correlate_rows_fixed&lt;PixelAccum&gt;(src_view, reverse_kernel(kernel), dst_view, option);</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span>}</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> </div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno"> 340</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno"> 341</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"> 342</span><span class="keywordtype">void</span> convolve_cols_fixed(</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00346" name="l00346"></a><span class="lineno"> 346</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00347" name="l00347"></a><span class="lineno"> 347</span>{</div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno"> 348</span> convolve_rows_fixed&lt;PixelAccum&gt;(</div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno"> 349</span> transposed_view(src_view), kernel, transposed_view(dst_view), option);</div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno"> 350</span>}</div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"> 351</span> </div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno"> 352</span><span class="keyword">namespace </span>detail</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno"> 353</span>{</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno"> 354</span> </div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno"> 363</span><span class="keyword">template</span> &lt;<span class="keyword">typename</span> PixelAccum, <span class="keyword">typename</span> SrcView, <span class="keyword">typename</span> Kernel, <span class="keyword">typename</span> DstView&gt;</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno"> 364</span>BOOST_FORCEINLINE</div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno"> 365</span><span class="keywordtype">void</span> convolve_1d(</div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno"> 366</span> SrcView <span class="keyword">const</span>&amp; src_view,</div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno"> 367</span> Kernel <span class="keyword">const</span>&amp; kernel,</div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno"> 368</span> DstView <span class="keyword">const</span>&amp; dst_view,</div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno"> 369</span> boundary_option option = boundary_option::extend_zero)</div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno"> 370</span>{</div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno"> 371</span> convolve_rows&lt;PixelAccum&gt;(src_view, kernel, dst_view, option);</div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno"> 372</span> convolve_cols&lt;PixelAccum&gt;(dst_view, kernel, dst_view, option);</div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno"> 373</span>}</div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno"> 374</span> </div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno"> 375</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="l00376" name="l00376"></a><span class="lineno"> 376</span><span class="keywordtype">void</span> convolve_2d_impl(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="l00377" name="l00377"></a><span class="lineno"> 377</span>{</div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno"> 378</span> <span class="keywordtype">int</span> flip_ker_row, flip_ker_col, row_boundary, col_boundary;</div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno"> 379</span> <span class="keywordtype">float</span> aux_total;</div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno"> 380</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="l00381" name="l00381"></a><span class="lineno"> 381</span> {</div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno"> 382</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="l00383" name="l00383"></a><span class="lineno"> 383</span> {</div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno"> 384</span> aux_total = 0.0f;</div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno"> 385</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="l00386" name="l00386"></a><span class="lineno"> 386</span> {</div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno"> 387</span> flip_ker_row = kernel.size() - 1 - kernel_row; <span class="comment">// row index of flipped kernel</span></div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno"> 388</span> </div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno"> 389</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="l00390" name="l00390"></a><span class="lineno"> 390</span> {</div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno"> 391</span> flip_ker_col = kernel.size() - 1 - kernel_col; <span class="comment">// column index of flipped kernel</span></div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno"> 392</span> </div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno"> 393</span> <span class="comment">// index of input signal, used for checking boundary</span></div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno"> 394</span> row_boundary = view_row + (kernel.center_y() - flip_ker_row);</div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno"> 395</span> col_boundary = view_col + (kernel.center_x() - flip_ker_col);</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno"> 396</span> </div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno"> 397</span> <span class="comment">// ignore input samples which are out of bound</span></div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno"> 398</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="l00399" name="l00399"></a><span class="lineno"> 399</span> col_boundary &gt;= 0 &amp;&amp; col_boundary &lt; src_view.width())</div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"> 400</span> {</div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno"> 401</span> aux_total +=</div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno"> 402</span> src_view(col_boundary, row_boundary)[0] *</div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno"> 403</span> kernel.at(flip_ker_col, flip_ker_row);</div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno"> 404</span> }</div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno"> 405</span> }</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno"> 406</span> }</div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno"> 407</span> dst_view(view_col, view_row) = aux_total;</div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno"> 408</span> }</div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno"> 409</span> }</div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno"> 410</span>}</div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno"> 411</span> </div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno"> 419</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="l00420" name="l00420"></a><span class="lineno"> 420</span><span class="keywordtype">void</span> convolve_2d(SrcView <span class="keyword">const</span>&amp; src_view, Kernel <span class="keyword">const</span>&amp; kernel, DstView <span class="keyword">const</span>&amp; dst_view)</div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno"> 421</span>{</div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno"> 422</span> BOOST_ASSERT(src_view.dimensions() == dst_view.dimensions());</div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno"> 423</span> BOOST_ASSERT(kernel.size() != 0);</div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno"> 424</span> </div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno"> 425</span> gil_function_requires&lt;ImageViewConcept&lt;SrcView&gt;&gt;();</div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno"> 426</span> gil_function_requires&lt;MutableImageViewConcept&lt;DstView&gt;&gt;();</div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno"> 427</span> <span class="keyword">static_assert</span>(color_spaces_are_compatible</div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno"> 428</span> &lt;</div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno"> 429</span> <span class="keyword">typename</span> color_space_type&lt;SrcView&gt;::type,</div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"> 430</span> <span class="keyword">typename</span> color_space_type&lt;DstView&gt;::type</div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno"> 431</span> &gt;::value, <span class="stringliteral">&quot;Source and destination views must have pixels with the same color space&quot;</span>);</div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno"> 432</span> </div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno"> 433</span> <span class="keywordflow">for</span> (std::size_t i = 0; i &lt; src_view.num_channels(); i++)</div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno"> 434</span> {</div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno"> 435</span> detail::convolve_2d_impl(</div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno"> 436</span> nth_channel_view(src_view, i),</div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno"> 437</span> nth_channel_view(dst_view, i),</div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno"> 438</span> kernel</div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno"> 439</span> );</div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno"> 440</span> }</div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno"> 441</span>}</div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno"> 442</span> </div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"> 443</span>}}} <span class="comment">// namespace boost::gil::detail</span></div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno"> 444</span> </div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno"> 445</span><span class="preprocessor">#endif</span></div>
<div class="ttc" id="aclassboost_1_1gil_1_1detail_1_1correlator__n_html"><div class="ttname"><a href="classboost_1_1gil_1_1detail_1_1correlator__n.html">boost::gil::detail::correlator_n</a></div><div class="ttdoc">Provides functionality for performing 1D correlation between the kernel and a buffer storing row pixe...</div><div class="ttdef"><b>Definition</b> convolve.hpp:160</div></div>
<div class="ttc" id="agroup___image_view_s_t_l_algorithms_fill_pixels_html_gad940ed7e69c241f2a16899a1bb0572ba"><div class="ttname"><a href="group___image_view_s_t_l_algorithms_fill_pixels.html#gad940ed7e69c241f2a16899a1bb0572ba">boost::gil::fill_pixels</a></div><div class="ttdeci">BOOST_FORCEINLINE void fill_pixels(View const &amp;view, Value const &amp;value)</div><div class="ttdoc">std::fill for image views</div><div class="ttdef"><b>Definition</b> algorithm.hpp:420</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_1detail_1_1correlator__k_html"><div class="ttname"><a href="structboost_1_1gil_1_1detail_1_1correlator__k.html">boost::gil::detail::correlator_k</a></div><div class="ttdoc">Provides functionality for performing 1D correlation between the kernel and a buffer storing row pixe...</div><div class="ttdef"><b>Definition</b> convolve.hpp:183</div></div>
<div class="ttc" id="astructboost_1_1gil_1_1size_html"><div class="ttname"><a href="structboost_1_1gil_1_1size.html">boost::gil::size</a></div><div class="ttdoc">Returns an integral constant type specifying the number of elements in a color base.</div><div class="ttdef"><b>Definition</b> color_base_algorithm.hpp:42</div></div>
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