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 116   <div class="summary">
 117 <a href="#func-members">Functions</a>  </div>
 118   <div class="headertitle">
 119 <div class="title">mean_stddev.cl File Reference</div>  </div>
 120 </div><!--header-->
 121 <div class="contents">
 122 <div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
 123 </div>
 124 <p><a href="mean__stddev_8cl_source.xhtml">Go to the source code of this file.</a></p>
 125 <table class="memberdecls">
 126 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
 127 Functions</h2></td></tr>
 128 <tr class="memitem:a35eedf10476f85a87aa70a4292dd380a"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="mean__stddev_8cl.xhtml#a35eedf10476f85a87aa70a4292dd380a">mean_stddev_accumulate</a> (__global uchar *src_ptr, uint src_stride_x, uint src_step_x, uint src_stride_y, uint src_step_y, uint src_offset_first_element_in_bytes, uint height, __global ulong *global_sum, __global ulong *global_sum_sq)</td></tr>
 129 <tr class="memdesc:a35eedf10476f85a87aa70a4292dd380a"><td class="mdescLeft">&#160;</td><td class="mdescRight">This function calculates the sum and sum of squares of a given input image.  <a href="#a35eedf10476f85a87aa70a4292dd380a">More...</a><br /></td></tr>
 130 <tr class="separator:a35eedf10476f85a87aa70a4292dd380a"><td class="memSeparator" colspan="2">&#160;</td></tr>
 131 </table>
 132 <h2 class="groupheader">Function Documentation</h2>
 133 <a class="anchor" id="a35eedf10476f85a87aa70a4292dd380a"></a>
 134 <div class="memitem">
 135 <div class="memproto">
 136       <table class="memname">
 137         <tr>
 138           <td class="memname">__kernel void mean_stddev_accumulate </td>
 139           <td>(</td>
 140           <td class="paramtype">__global uchar *&#160;</td>
 141           <td class="paramname"><em>src_ptr</em>, </td>
 142         </tr>
 143         <tr>
 144           <td class="paramkey"></td>
 145           <td></td>
 146           <td class="paramtype">uint&#160;</td>
 147           <td class="paramname"><em>src_stride_x</em>, </td>
 148         </tr>
 149         <tr>
 150           <td class="paramkey"></td>
 151           <td></td>
 152           <td class="paramtype">uint&#160;</td>
 153           <td class="paramname"><em>src_step_x</em>, </td>
 154         </tr>
 155         <tr>
 156           <td class="paramkey"></td>
 157           <td></td>
 158           <td class="paramtype">uint&#160;</td>
 159           <td class="paramname"><em>src_stride_y</em>, </td>
 160         </tr>
 161         <tr>
 162           <td class="paramkey"></td>
 163           <td></td>
 164           <td class="paramtype">uint&#160;</td>
 165           <td class="paramname"><em>src_step_y</em>, </td>
 166         </tr>
 167         <tr>
 168           <td class="paramkey"></td>
 169           <td></td>
 170           <td class="paramtype">uint&#160;</td>
 171           <td class="paramname"><em>src_offset_first_element_in_bytes</em>, </td>
 172         </tr>
 173         <tr>
 174           <td class="paramkey"></td>
 175           <td></td>
 176           <td class="paramtype">uint&#160;</td>
 177           <td class="paramname"><em>height</em>, </td>
 178         </tr>
 179         <tr>
 180           <td class="paramkey"></td>
 181           <td></td>
 182           <td class="paramtype">__global ulong *&#160;</td>
 183           <td class="paramname"><em>global_sum</em>, </td>
 184         </tr>
 185         <tr>
 186           <td class="paramkey"></td>
 187           <td></td>
 188           <td class="paramtype">__global ulong *&#160;</td>
 189           <td class="paramname"><em>global_sum_sq</em>&#160;</td>
 190         </tr>
 191         <tr>
 192           <td></td>
 193           <td>)</td>
 194           <td></td><td></td>
 195         </tr>
 196       </table>
 197 </div><div class="memdoc">
 198
 199 <p>This function calculates the sum and sum of squares of a given input image. </p>
 200 <dl class="section note"><dt>Note</dt><dd>To enable calculation sum of squares -DSTDDEV should be passed as a preprocessor argument.</dd></dl>
 201 <dl class="params"><dt>Parameters</dt><dd>
 202   <table class="params">
 203     <tr><td class="paramdir">[in]</td><td class="paramname">src_ptr</td><td>Pointer to the source image. Supported data types: U8 </td></tr>
 204     <tr><td class="paramdir">[in]</td><td class="paramname">src_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
 205     <tr><td class="paramdir">[in]</td><td class="paramname">src_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 206     <tr><td class="paramdir">[in]</td><td class="paramname">src_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
 207     <tr><td class="paramdir">[in]</td><td class="paramname">src_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 208     <tr><td class="paramdir">[in]</td><td class="paramname">src_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 209     <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the input image </td></tr>
 210     <tr><td class="paramdir">[out]</td><td class="paramname">global_sum</td><td>Global sum of all elements </td></tr>
 211     <tr><td class="paramdir">[out]</td><td class="paramname">global_sum_sq</td><td>Global sum of squares of all elements </td></tr>
 212   </table>
 213   </dd>
 214 </dl>
 215
 216 <p>Definition at line <a class="el" href="mean__stddev_8cl_source.xhtml#l00043">43</a> of file <a class="el" href="mean__stddev_8cl_source.xhtml">mean_stddev.cl</a>.</p>
 217
 218 <p>References <a class="el" href="helpers_8h_source.xhtml#l00102">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="helpers_8h_source.xhtml#l00301">offset()</a>, and <a class="el" href="_c_l_2_convolution_8cpp_source.xhtml#l00147">arm_compute::test::validation::src</a>.</p>
 219 <div class="fragment"><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;{</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="comment">// Get pixels pointer</span></div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a6743f0a130e8311e6f5b1a23df102472">src</a> = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src);</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;    uint8 tmp_sum = 0;</div><div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="preprocessor">#ifdef STDDEV</span></div><div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;    uint8 tmp_sum_sq = 0;</div><div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* STDDEV */</span><span class="preprocessor"></span></div><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;    <span class="comment">// Calculate partial sum</span></div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = 0; i &lt; height; i++)</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    {</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;        <span class="comment">// Load data</span></div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;        uint8 data = convert_uint8(vload8(0, <a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src, 0, i)));</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;</div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;        tmp_sum += data;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="preprocessor">#ifdef STDDEV</span></div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;        tmp_sum_sq += data * data;</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* STDDEV */</span><span class="preprocessor"></span></div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    }</div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    <span class="comment">// Perform reduction</span></div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    tmp_sum.s0123 += tmp_sum.s4567;</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    tmp_sum.s01 += tmp_sum.s23;</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    atom_add(global_sum, tmp_sum.s0 + tmp_sum.s1);</div><div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="preprocessor">#ifdef STDDEV</span></div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    tmp_sum_sq.s0123 += tmp_sum_sq.s4567;</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    tmp_sum_sq.s01 += tmp_sum_sq.s23;</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    atom_add(global_sum_sq, tmp_sum_sq.s0 + tmp_sum_sq.s1);</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* STDDEV */</span><span class="preprocessor"></span></div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;}</div><div class="ttc" id="helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a></div><div class="ttdeci">__global uchar * offset(const Image *img, int x, int y)</div><div class="ttdoc">Get the pointer position of a Image. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00301">helpers.h:301</a></div></div>
 220 <div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00102">helpers.h:102</a></div></div>
 221 <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00140">helpers.h:140</a></div></div>
 222 <div class="ttc" id="namespacearm__compute_1_1test_1_1validation_xhtml_a6743f0a130e8311e6f5b1a23df102472"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation.xhtml#a6743f0a130e8311e6f5b1a23df102472">arm_compute::test::validation::src</a></div><div class="ttdeci">convolution configure &amp; src</div><div class="ttdef"><b>Definition:</b> <a href="_c_l_2_convolution_8cpp_source.xhtml#l00147">Convolution.cpp:147</a></div></div>
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