documentation/harris__corners_8cl.xhtml

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 114 <div class="header">
 115   <div class="summary">
 116 <a href="#func-members">Functions</a>  </div>
 117   <div class="headertitle">
 118 <div class="title">harris_corners.cl File Reference</div>  </div>
 119 </div><!--header-->
 120 <div class="contents">
 121 <div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
 122 </div>
 123 <p><a href="harris__corners_8cl_source.xhtml">Go to the source code of this file.</a></p>
 124 <table class="memberdecls">
 125 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
 126 Functions</h2></td></tr>
 127 <tr class="memitem:a2cf3b8c23c9f8f383d81d13bfff96e3d"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="harris__corners_8cl.xhtml#a2cf3b8c23c9f8f383d81d13bfff96e3d">harris_score_3x3</a> (__global uchar *src_gx_ptr, uint src_gx_stride_x, uint src_gx_step_x, uint src_gx_stride_y, uint src_gx_step_y, uint src_gx_offset_first_element_in_bytes, __global uchar *src_gy_ptr, uint src_gy_stride_x, uint src_gy_step_x, uint src_gy_stride_y, uint src_gy_step_y, uint src_gy_offset_first_element_in_bytes, __global uchar *vc_ptr, uint vc_stride_x, uint vc_step_x, uint vc_stride_y, uint vc_step_y, uint vc_offset_first_element_in_bytes, float sensitivity, float strength_thresh, float pow4_normalization_factor)</td></tr>
 128 <tr class="memdesc:a2cf3b8c23c9f8f383d81d13bfff96e3d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function running harris score on 3x3 block size.  <a href="#a2cf3b8c23c9f8f383d81d13bfff96e3d">More...</a><br /></td></tr>
 129 <tr class="separator:a2cf3b8c23c9f8f383d81d13bfff96e3d"><td class="memSeparator" colspan="2">&#160;</td></tr>
 130 <tr class="memitem:a71d10f5d9e840b6d270620a2cd856926"><td class="memItemLeft" align="right" valign="top">float16&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="harris__corners_8cl.xhtml#a71d10f5d9e840b6d270620a2cd856926">harris_score_1x5</a> (<a class="el" href="struct_image.xhtml">Image</a> *src_gx, <a class="el" href="struct_image.xhtml">Image</a> *src_gy, int row)</td></tr>
 131 <tr class="memdesc:a71d10f5d9e840b6d270620a2cd856926"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function for calculating harris score 1x5.  <a href="#a71d10f5d9e840b6d270620a2cd856926">More...</a><br /></td></tr>
 132 <tr class="separator:a71d10f5d9e840b6d270620a2cd856926"><td class="memSeparator" colspan="2">&#160;</td></tr>
 133 <tr class="memitem:a0f0af2add0a40f2f4b8a14f409186a02"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="harris__corners_8cl.xhtml#a0f0af2add0a40f2f4b8a14f409186a02">harris_score_5x5</a> (__global uchar *src_gx_ptr, uint src_gx_stride_x, uint src_gx_step_x, uint src_gx_stride_y, uint src_gx_step_y, uint src_gx_offset_first_element_in_bytes, __global uchar *src_gy_ptr, uint src_gy_stride_x, uint src_gy_step_x, uint src_gy_stride_y, uint src_gy_step_y, uint src_gy_offset_first_element_in_bytes, __global uchar *vc_ptr, uint vc_stride_x, uint vc_step_x, uint vc_stride_y, uint vc_step_y, uint vc_offset_first_element_in_bytes, float sensitivity, float strength_thresh, float pow4_normalization_factor)</td></tr>
 134 <tr class="memdesc:a0f0af2add0a40f2f4b8a14f409186a02"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function running harris score on 5x5 block size.  <a href="#a0f0af2add0a40f2f4b8a14f409186a02">More...</a><br /></td></tr>
 135 <tr class="separator:a0f0af2add0a40f2f4b8a14f409186a02"><td class="memSeparator" colspan="2">&#160;</td></tr>
 136 <tr class="memitem:a2fadfd6378605824bb7926e1ac0123fb"><td class="memItemLeft" align="right" valign="top">float16&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="harris__corners_8cl.xhtml#a2fadfd6378605824bb7926e1ac0123fb">harris_score_1x7</a> (<a class="el" href="struct_image.xhtml">Image</a> *src_gx, <a class="el" href="struct_image.xhtml">Image</a> *src_gy, int row)</td></tr>
 137 <tr class="memdesc:a2fadfd6378605824bb7926e1ac0123fb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function for calculating harris score 1x7.  <a href="#a2fadfd6378605824bb7926e1ac0123fb">More...</a><br /></td></tr>
 138 <tr class="separator:a2fadfd6378605824bb7926e1ac0123fb"><td class="memSeparator" colspan="2">&#160;</td></tr>
 139 <tr class="memitem:a468ac2728816485f017f51faeb0a7d65"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="harris__corners_8cl.xhtml#a468ac2728816485f017f51faeb0a7d65">harris_score_7x7</a> (__global uchar *src_gx_ptr, uint src_gx_stride_x, uint src_gx_step_x, uint src_gx_stride_y, uint src_gx_step_y, uint src_gx_offset_first_element_in_bytes, __global uchar *src_gy_ptr, uint src_gy_stride_x, uint src_gy_step_x, uint src_gy_stride_y, uint src_gy_step_y, uint src_gy_offset_first_element_in_bytes, __global uchar *vc_ptr, uint vc_stride_x, uint vc_step_x, uint vc_stride_y, uint vc_step_y, uint vc_offset_first_element_in_bytes, float sensitivity, float strength_thresh, float pow4_normalization_factor)</td></tr>
 140 <tr class="memdesc:a468ac2728816485f017f51faeb0a7d65"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function running harris score on 7x7 block size.  <a href="#a468ac2728816485f017f51faeb0a7d65">More...</a><br /></td></tr>
 141 <tr class="separator:a468ac2728816485f017f51faeb0a7d65"><td class="memSeparator" colspan="2">&#160;</td></tr>
 142 </table>
 143 <h2 class="groupheader">Function Documentation</h2>
 144 <a class="anchor" id="a71d10f5d9e840b6d270620a2cd856926"></a>
 145 <div class="memitem">
 146 <div class="memproto">
 147 <table class="mlabels">
 148   <tr>
 149   <td class="mlabels-left">
 150       <table class="memname">
 151         <tr>
 152           <td class="memname">float16 harris_score_1x5 </td>
 153           <td>(</td>
 154           <td class="paramtype"><a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
 155           <td class="paramname"><em>src_gx</em>, </td>
 156         </tr>
 157         <tr>
 158           <td class="paramkey"></td>
 159           <td></td>
 160           <td class="paramtype"><a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
 161           <td class="paramname"><em>src_gy</em>, </td>
 162         </tr>
 163         <tr>
 164           <td class="paramkey"></td>
 165           <td></td>
 166           <td class="paramtype">int&#160;</td>
 167           <td class="paramname"><em>row</em>&#160;</td>
 168         </tr>
 169         <tr>
 170           <td></td>
 171           <td>)</td>
 172           <td></td><td></td>
 173         </tr>
 174       </table>
 175   </td>
 176   <td class="mlabels-right">
 177 <span class="mlabels"><span class="mlabel">inline</span></span>  </td>
 178   </tr>
 179 </table>
 180 </div><div class="memdoc">
 181
 182 <p>Function for calculating harris score 1x5. </p>
 183 <dl class="params"><dt>Parameters</dt><dd>
 184   <table class="params">
 185     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx</td><td>Pointer to gx gradient image. </td></tr>
 186     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy</td><td>Pointer to gy gradient image. </td></tr>
 187     <tr><td class="paramdir">[in]</td><td class="paramname">row</td><td>Relative row. </td></tr>
 188   </table>
 189   </dd>
 190 </dl>
 191
 192 <p>Definition at line <a class="el" href="harris__corners_8cl_source.xhtml#l00138">138</a> of file <a class="el" href="harris__corners_8cl_source.xhtml">harris_corners.cl</a>.</p>
 193
 194 <p>References <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="helpers_8h_source.xhtml#l00201">offset()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00032">VEC_DATA_TYPE</a>.</p>
 195
 196 <p>Referenced by <a class="el" href="harris__corners_8cl_source.xhtml#l00210">harris_score_5x5()</a>.</p>
 197 <div class="fragment"><div class="line"><a name="l00139"></a><span class="lineno">  139</span>&#160;{</div><div class="line"><a name="l00140"></a><span class="lineno">  140</span>&#160;    float4 gx2  = 0.0f;</div><div class="line"><a name="l00141"></a><span class="lineno">  141</span>&#160;    float4 gy2  = 0.0f;</div><div class="line"><a name="l00142"></a><span class="lineno">  142</span>&#160;    float4 gxgy = 0.0f;</div><div class="line"><a name="l00143"></a><span class="lineno">  143</span>&#160;</div><div class="line"><a name="l00144"></a><span class="lineno">  144</span>&#160;    <span class="comment">/* Row */</span></div><div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 8)</div><div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;    temp_gx = vload8(0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(src_gx, -2, row));</div><div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 8)</div><div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;    temp_gy = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(src_gy, -2, row));</div><div class="line"><a name="l00149"></a><span class="lineno">  149</span>&#160;</div><div class="line"><a name="l00150"></a><span class="lineno">  150</span>&#160;    float4 gx = convert_float4(temp_gx.s0123);</div><div class="line"><a name="l00151"></a><span class="lineno">  151</span>&#160;    float4 gy = convert_float4(temp_gy.s0123);</div><div class="line"><a name="l00152"></a><span class="lineno">  152</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;</div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;    gx = convert_float4(temp_gx.s1234);</div><div class="line"><a name="l00157"></a><span class="lineno">  157</span>&#160;    gy = convert_float4(temp_gy.s1234);</div><div class="line"><a name="l00158"></a><span class="lineno">  158</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00159"></a><span class="lineno">  159</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00160"></a><span class="lineno">  160</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;</div><div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;    gx = convert_float4(temp_gx.s2345);</div><div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;    gy = convert_float4(temp_gy.s2345);</div><div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;</div><div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;    gx = convert_float4(temp_gx.s3456);</div><div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;    gy = convert_float4(temp_gy.s3456);</div><div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;</div><div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;    gx = convert_float4(temp_gx.s4567);</div><div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;    gy = convert_float4(temp_gy.s4567);</div><div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00177"></a><span class="lineno">  177</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00178"></a><span class="lineno">  178</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00179"></a><span class="lineno">  179</span>&#160;</div><div class="line"><a name="l00180"></a><span class="lineno">  180</span>&#160;    return (float16)(gx2, gy2, gxgy, (float4)0);</div><div class="line"><a name="l00181"></a><span class="lineno">  181</span>&#160;}</div><div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 198 <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#l00201">helpers.h:201</a></div></div>
 199 <div class="ttc" id="helpers_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00032">helpers.h:32</a></div></div>
 200 </div><!-- fragment -->
 201 </div>
 202 </div>
 203 <a class="anchor" id="a2fadfd6378605824bb7926e1ac0123fb"></a>
 204 <div class="memitem">
 205 <div class="memproto">
 206 <table class="mlabels">
 207   <tr>
 208   <td class="mlabels-left">
 209       <table class="memname">
 210         <tr>
 211           <td class="memname">float16 harris_score_1x7 </td>
 212           <td>(</td>
 213           <td class="paramtype"><a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
 214           <td class="paramname"><em>src_gx</em>, </td>
 215         </tr>
 216         <tr>
 217           <td class="paramkey"></td>
 218           <td></td>
 219           <td class="paramtype"><a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
 220           <td class="paramname"><em>src_gy</em>, </td>
 221         </tr>
 222         <tr>
 223           <td class="paramkey"></td>
 224           <td></td>
 225           <td class="paramtype">int&#160;</td>
 226           <td class="paramname"><em>row</em>&#160;</td>
 227         </tr>
 228         <tr>
 229           <td></td>
 230           <td>)</td>
 231           <td></td><td></td>
 232         </tr>
 233       </table>
 234   </td>
 235   <td class="mlabels-right">
 236 <span class="mlabels"><span class="mlabel">inline</span></span>  </td>
 237   </tr>
 238 </table>
 239 </div><div class="memdoc">
 240
 241 <p>Function for calculating harris score 1x7. </p>
 242 <dl class="params"><dt>Parameters</dt><dd>
 243   <table class="params">
 244     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx</td><td>Pointer to gx gradient image. </td></tr>
 245     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy</td><td>Pointer to gy gradient image. </td></tr>
 246     <tr><td class="paramdir">[in]</td><td class="paramname">row</td><td>Relative row. </td></tr>
 247   </table>
 248   </dd>
 249 </dl>
 250
 251 <p>Definition at line <a class="el" href="harris__corners_8cl_source.xhtml#l00253">253</a> of file <a class="el" href="harris__corners_8cl_source.xhtml">harris_corners.cl</a>.</p>
 252
 253 <p>References <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="helpers_8h_source.xhtml#l00201">offset()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00032">VEC_DATA_TYPE</a>.</p>
 254
 255 <p>Referenced by <a class="el" href="harris__corners_8cl_source.xhtml#l00341">harris_score_7x7()</a>.</p>
 256 <div class="fragment"><div class="line"><a name="l00254"></a><span class="lineno">  254</span>&#160;{</div><div class="line"><a name="l00255"></a><span class="lineno">  255</span>&#160;    float4 gx2  = 0.0f;</div><div class="line"><a name="l00256"></a><span class="lineno">  256</span>&#160;    float4 gy2  = 0.0f;</div><div class="line"><a name="l00257"></a><span class="lineno">  257</span>&#160;    float4 gxgy = 0.0f;</div><div class="line"><a name="l00258"></a><span class="lineno">  258</span>&#160;</div><div class="line"><a name="l00259"></a><span class="lineno">  259</span>&#160;    <span class="comment">/* Row */</span></div><div class="line"><a name="l00260"></a><span class="lineno">  260</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 8)</div><div class="line"><a name="l00261"></a><span class="lineno">  261</span>&#160;    temp_gx0 = vload8(0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(src_gx, -3, row));</div><div class="line"><a name="l00262"></a><span class="lineno">  262</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 8)</div><div class="line"><a name="l00263"></a><span class="lineno">  263</span>&#160;    temp_gy0 = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(src_gy, -3, row));</div><div class="line"><a name="l00264"></a><span class="lineno">  264</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE, 2)</div><div class="line"><a name="l00265"></a><span class="lineno">  265</span>&#160;    temp_gx1 = vload2(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(src_gx, 5, row));</div><div class="line"><a name="l00266"></a><span class="lineno">  266</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE, 2)</div><div class="line"><a name="l00267"></a><span class="lineno">  267</span>&#160;    temp_gy1 = vload2(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(src_gy, 5, row));</div><div class="line"><a name="l00268"></a><span class="lineno">  268</span>&#160;</div><div class="line"><a name="l00269"></a><span class="lineno">  269</span>&#160;    float4 gx = convert_float4(temp_gx0.s0123);</div><div class="line"><a name="l00270"></a><span class="lineno">  270</span>&#160;    float4 gy = convert_float4(temp_gy0.s0123);</div><div class="line"><a name="l00271"></a><span class="lineno">  271</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00272"></a><span class="lineno">  272</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00273"></a><span class="lineno">  273</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00274"></a><span class="lineno">  274</span>&#160;</div><div class="line"><a name="l00275"></a><span class="lineno">  275</span>&#160;    gx = convert_float4(temp_gx0.s1234);</div><div class="line"><a name="l00276"></a><span class="lineno">  276</span>&#160;    gy = convert_float4(temp_gy0.s1234);</div><div class="line"><a name="l00277"></a><span class="lineno">  277</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00278"></a><span class="lineno">  278</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00279"></a><span class="lineno">  279</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00280"></a><span class="lineno">  280</span>&#160;</div><div class="line"><a name="l00281"></a><span class="lineno">  281</span>&#160;    gx = convert_float4(temp_gx0.s2345);</div><div class="line"><a name="l00282"></a><span class="lineno">  282</span>&#160;    gy = convert_float4(temp_gy0.s2345);</div><div class="line"><a name="l00283"></a><span class="lineno">  283</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00284"></a><span class="lineno">  284</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00285"></a><span class="lineno">  285</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00286"></a><span class="lineno">  286</span>&#160;</div><div class="line"><a name="l00287"></a><span class="lineno">  287</span>&#160;    gx = convert_float4(temp_gx0.s3456);</div><div class="line"><a name="l00288"></a><span class="lineno">  288</span>&#160;    gy = convert_float4(temp_gy0.s3456);</div><div class="line"><a name="l00289"></a><span class="lineno">  289</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00290"></a><span class="lineno">  290</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00291"></a><span class="lineno">  291</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00292"></a><span class="lineno">  292</span>&#160;</div><div class="line"><a name="l00293"></a><span class="lineno">  293</span>&#160;    gx = convert_float4(temp_gx0.s4567);</div><div class="line"><a name="l00294"></a><span class="lineno">  294</span>&#160;    gy = convert_float4(temp_gy0.s4567);</div><div class="line"><a name="l00295"></a><span class="lineno">  295</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00296"></a><span class="lineno">  296</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00297"></a><span class="lineno">  297</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00298"></a><span class="lineno">  298</span>&#160;</div><div class="line"><a name="l00299"></a><span class="lineno">  299</span>&#160;    gx = convert_float4((<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE, 4))(temp_gx0.s567, temp_gx1.s0));</div><div class="line"><a name="l00300"></a><span class="lineno">  300</span>&#160;    gy = convert_float4((<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE, 4))(temp_gy0.s567, temp_gy1.s0));</div><div class="line"><a name="l00301"></a><span class="lineno">  301</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00302"></a><span class="lineno">  302</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00303"></a><span class="lineno">  303</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00304"></a><span class="lineno">  304</span>&#160;</div><div class="line"><a name="l00305"></a><span class="lineno">  305</span>&#160;    gx = convert_float4((<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE, 4))(temp_gx0.s67, temp_gx1.s01));</div><div class="line"><a name="l00306"></a><span class="lineno">  306</span>&#160;    gy = convert_float4((<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(DATA_TYPE, 4))(temp_gy0.s67, temp_gy1.s01));</div><div class="line"><a name="l00307"></a><span class="lineno">  307</span>&#160;    gx2 += (gx * gx);</div><div class="line"><a name="l00308"></a><span class="lineno">  308</span>&#160;    gy2 += (gy * gy);</div><div class="line"><a name="l00309"></a><span class="lineno">  309</span>&#160;    gxgy += (gx * gy);</div><div class="line"><a name="l00310"></a><span class="lineno">  310</span>&#160;</div><div class="line"><a name="l00311"></a><span class="lineno">  311</span>&#160;    return (float16)(gx2, gy2, gxgy, (float4)0);</div><div class="line"><a name="l00312"></a><span class="lineno">  312</span>&#160;}</div><div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 257 <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#l00201">helpers.h:201</a></div></div>
 258 <div class="ttc" id="helpers_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00032">helpers.h:32</a></div></div>
 259 </div><!-- fragment -->
 260 </div>
 261 </div>
 262 <a class="anchor" id="a2cf3b8c23c9f8f383d81d13bfff96e3d"></a>
 263 <div class="memitem">
 264 <div class="memproto">
 265       <table class="memname">
 266         <tr>
 267           <td class="memname">__kernel void harris_score_3x3 </td>
 268           <td>(</td>
 269           <td class="paramtype">__global uchar *&#160;</td>
 270           <td class="paramname"><em>src_gx_ptr</em>, </td>
 271         </tr>
 272         <tr>
 273           <td class="paramkey"></td>
 274           <td></td>
 275           <td class="paramtype">uint&#160;</td>
 276           <td class="paramname"><em>src_gx_stride_x</em>, </td>
 277         </tr>
 278         <tr>
 279           <td class="paramkey"></td>
 280           <td></td>
 281           <td class="paramtype">uint&#160;</td>
 282           <td class="paramname"><em>src_gx_step_x</em>, </td>
 283         </tr>
 284         <tr>
 285           <td class="paramkey"></td>
 286           <td></td>
 287           <td class="paramtype">uint&#160;</td>
 288           <td class="paramname"><em>src_gx_stride_y</em>, </td>
 289         </tr>
 290         <tr>
 291           <td class="paramkey"></td>
 292           <td></td>
 293           <td class="paramtype">uint&#160;</td>
 294           <td class="paramname"><em>src_gx_step_y</em>, </td>
 295         </tr>
 296         <tr>
 297           <td class="paramkey"></td>
 298           <td></td>
 299           <td class="paramtype">uint&#160;</td>
 300           <td class="paramname"><em>src_gx_offset_first_element_in_bytes</em>, </td>
 301         </tr>
 302         <tr>
 303           <td class="paramkey"></td>
 304           <td></td>
 305           <td class="paramtype">__global uchar *&#160;</td>
 306           <td class="paramname"><em>src_gy_ptr</em>, </td>
 307         </tr>
 308         <tr>
 309           <td class="paramkey"></td>
 310           <td></td>
 311           <td class="paramtype">uint&#160;</td>
 312           <td class="paramname"><em>src_gy_stride_x</em>, </td>
 313         </tr>
 314         <tr>
 315           <td class="paramkey"></td>
 316           <td></td>
 317           <td class="paramtype">uint&#160;</td>
 318           <td class="paramname"><em>src_gy_step_x</em>, </td>
 319         </tr>
 320         <tr>
 321           <td class="paramkey"></td>
 322           <td></td>
 323           <td class="paramtype">uint&#160;</td>
 324           <td class="paramname"><em>src_gy_stride_y</em>, </td>
 325         </tr>
 326         <tr>
 327           <td class="paramkey"></td>
 328           <td></td>
 329           <td class="paramtype">uint&#160;</td>
 330           <td class="paramname"><em>src_gy_step_y</em>, </td>
 331         </tr>
 332         <tr>
 333           <td class="paramkey"></td>
 334           <td></td>
 335           <td class="paramtype">uint&#160;</td>
 336           <td class="paramname"><em>src_gy_offset_first_element_in_bytes</em>, </td>
 337         </tr>
 338         <tr>
 339           <td class="paramkey"></td>
 340           <td></td>
 341           <td class="paramtype">__global uchar *&#160;</td>
 342           <td class="paramname"><em>vc_ptr</em>, </td>
 343         </tr>
 344         <tr>
 345           <td class="paramkey"></td>
 346           <td></td>
 347           <td class="paramtype">uint&#160;</td>
 348           <td class="paramname"><em>vc_stride_x</em>, </td>
 349         </tr>
 350         <tr>
 351           <td class="paramkey"></td>
 352           <td></td>
 353           <td class="paramtype">uint&#160;</td>
 354           <td class="paramname"><em>vc_step_x</em>, </td>
 355         </tr>
 356         <tr>
 357           <td class="paramkey"></td>
 358           <td></td>
 359           <td class="paramtype">uint&#160;</td>
 360           <td class="paramname"><em>vc_stride_y</em>, </td>
 361         </tr>
 362         <tr>
 363           <td class="paramkey"></td>
 364           <td></td>
 365           <td class="paramtype">uint&#160;</td>
 366           <td class="paramname"><em>vc_step_y</em>, </td>
 367         </tr>
 368         <tr>
 369           <td class="paramkey"></td>
 370           <td></td>
 371           <td class="paramtype">uint&#160;</td>
 372           <td class="paramname"><em>vc_offset_first_element_in_bytes</em>, </td>
 373         </tr>
 374         <tr>
 375           <td class="paramkey"></td>
 376           <td></td>
 377           <td class="paramtype">float&#160;</td>
 378           <td class="paramname"><em>sensitivity</em>, </td>
 379         </tr>
 380         <tr>
 381           <td class="paramkey"></td>
 382           <td></td>
 383           <td class="paramtype">float&#160;</td>
 384           <td class="paramname"><em>strength_thresh</em>, </td>
 385         </tr>
 386         <tr>
 387           <td class="paramkey"></td>
 388           <td></td>
 389           <td class="paramtype">float&#160;</td>
 390           <td class="paramname"><em>pow4_normalization_factor</em>&#160;</td>
 391         </tr>
 392         <tr>
 393           <td></td>
 394           <td>)</td>
 395           <td></td><td></td>
 396         </tr>
 397       </table>
 398 </div><div class="memdoc">
 399
 400 <p>Function running harris score on 3x3 block size. </p>
 401 <dl class="section attention"><dt>Attention</dt><dd>: The input data type should be passed using a compile option -DDATA_TYPE. Supported types: short and int. e.g. -DDATA_TYPE=short.</dd></dl>
 402 <dl class="params"><dt>Parameters</dt><dd>
 403   <table class="params">
 404     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_ptr</td><td>Pointer to the first source image. Supported data types: S16, S32 </td></tr>
 405     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
 406     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_step_x</td><td>src_gx_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 407     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
 408     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_step_y</td><td>src_gx_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 409     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 410     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_ptr</td><td>Pointer to the second source image. Supported data types: S16, S32 </td></tr>
 411     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 412     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_step_x</td><td>src_gy_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 413     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 414     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_step_y</td><td>src_gy_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 415     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 416     <tr><td class="paramdir">[out]</td><td class="paramname">vc_ptr</td><td>Pointer to the destination image. Supported data types: F32 </td></tr>
 417     <tr><td class="paramdir">[in]</td><td class="paramname">vc_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 418     <tr><td class="paramdir">[in]</td><td class="paramname">vc_step_x</td><td>vc_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 419     <tr><td class="paramdir">[in]</td><td class="paramname">vc_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 420     <tr><td class="paramdir">[in]</td><td class="paramname">vc_step_y</td><td>vc_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 421     <tr><td class="paramdir">[in]</td><td class="paramname">vc_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 422     <tr><td class="paramdir">[in]</td><td class="paramname">sensitivity</td><td>Sensitivity threshold k from the Harris-Stephens equation </td></tr>
 423     <tr><td class="paramdir">[in]</td><td class="paramname">strength_thresh</td><td>Minimum threshold with which to eliminate Harris Corner scores </td></tr>
 424     <tr><td class="paramdir">[in]</td><td class="paramname">pow4_normalization_factor</td><td>Normalization factor to apply harris score </td></tr>
 425   </table>
 426   </dd>
 427 </dl>
 428
 429 <p>Definition at line <a class="el" href="harris__corners_8cl_source.xhtml#l00053">53</a> of file <a class="el" href="harris__corners_8cl_source.xhtml">harris_corners.cl</a>.</p>
 430
 431 <p>References <a class="el" href="helpers_8h_source.xhtml#l00073">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="helpers_8h_source.xhtml#l00201">offset()</a>, <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>, and <a class="el" href="helpers_8h_source.xhtml#l00032">VEC_DATA_TYPE</a>.</p>
 432 <div class="fragment"><div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;{</div><div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> src_gx = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src_gx);</div><div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> src_gy = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src_gy);</div><div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> vc     = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(vc);</div><div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div><div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;    <span class="comment">/* Gx^2, Gy^2 and Gx*Gy */</span></div><div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;    float4 gx2  = (float4)0.0f;</div><div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;    float4 gy2  = (float4)0.0f;</div><div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;    float4 gxgy = (float4)0.0f;</div><div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;</div><div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;    <span class="comment">/* Row0 */</span></div><div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 8)</div><div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;    temp_gx = vload8(0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src_gx, -1, -1));</div><div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;    <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 8)</div><div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;    temp_gy = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src_gy, -1, -1));</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;    float4 l_gx = convert_float4(temp_gx.s0123);</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    float4 m_gx = convert_float4(temp_gx.s1234);</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    float4 r_gx = convert_float4(temp_gx.s2345);</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    float4 l_gy = convert_float4(temp_gy.s0123);</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    float4 m_gy = convert_float4(temp_gy.s1234);</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    float4 r_gy = convert_float4(temp_gy.s2345);</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    gx2 += (l_gx * l_gx) + (m_gx * m_gx) + (r_gx * r_gx);</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    gy2 += (l_gy * l_gy) + (m_gy * m_gy) + (r_gy * r_gy);</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    gxgy += (l_gx * l_gy) + (m_gx * m_gy) + (r_gx * r_gy);</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    <span class="comment">/* Row1 */</span></div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;    temp_gx = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src_gx, -1, 0));</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;    temp_gy = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src_gy, -1, 0));</div><div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;</div><div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;    l_gx = convert_float4(temp_gx.s0123);</div><div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;    m_gx = convert_float4(temp_gx.s1234);</div><div class="line"><a name="l00094"></a><span class="lineno">   94</span>&#160;    r_gx = convert_float4(temp_gx.s2345);</div><div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;</div><div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;    l_gy = convert_float4(temp_gy.s0123);</div><div class="line"><a name="l00097"></a><span class="lineno">   97</span>&#160;    m_gy = convert_float4(temp_gy.s1234);</div><div class="line"><a name="l00098"></a><span class="lineno">   98</span>&#160;    r_gy = convert_float4(temp_gy.s2345);</div><div class="line"><a name="l00099"></a><span class="lineno">   99</span>&#160;</div><div class="line"><a name="l00100"></a><span class="lineno">  100</span>&#160;    gx2 += (l_gx * l_gx) + (m_gx * m_gx) + (r_gx * r_gx);</div><div class="line"><a name="l00101"></a><span class="lineno">  101</span>&#160;    gy2 += (l_gy * l_gy) + (m_gy * m_gy) + (r_gy * r_gy);</div><div class="line"><a name="l00102"></a><span class="lineno">  102</span>&#160;    gxgy += (l_gx * l_gy) + (m_gx * m_gy) + (r_gx * r_gy);</div><div class="line"><a name="l00103"></a><span class="lineno">  103</span>&#160;</div><div class="line"><a name="l00104"></a><span class="lineno">  104</span>&#160;    <span class="comment">/* Row2 */</span></div><div class="line"><a name="l00105"></a><span class="lineno">  105</span>&#160;    temp_gx = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src_gx, -1, 1));</div><div class="line"><a name="l00106"></a><span class="lineno">  106</span>&#160;    temp_gy = vload8(0, (__global DATA_TYPE *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&amp;src_gy, -1, 1));</div><div class="line"><a name="l00107"></a><span class="lineno">  107</span>&#160;</div><div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;    l_gx = convert_float4(temp_gx.s0123);</div><div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;    m_gx = convert_float4(temp_gx.s1234);</div><div class="line"><a name="l00110"></a><span class="lineno">  110</span>&#160;    r_gx = convert_float4(temp_gx.s2345);</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    l_gy = convert_float4(temp_gy.s0123);</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    m_gy = convert_float4(temp_gy.s1234);</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    r_gy = convert_float4(temp_gy.s2345);</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    gx2 += (l_gx * l_gx) + (m_gx * m_gx) + (r_gx * r_gx);</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;    gy2 += (l_gy * l_gy) + (m_gy * m_gy) + (r_gy * r_gy);</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    gxgy += (l_gx * l_gy) + (m_gx * m_gy) + (r_gx * r_gy);</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="comment">/* Compute trace and determinant */</span></div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    float4 trace = gx2 + gy2;</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    float4 det   = gx2 * gy2 - (gxgy * gxgy);</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;    <span class="comment">/* Compute harris score */</span></div><div class="line"><a name="l00125"></a><span class="lineno">  125</span>&#160;    float4 mc = (det - (sensitivity * (trace * trace))) * pow4_normalization_factor;</div><div class="line"><a name="l00126"></a><span class="lineno">  126</span>&#160;</div><div class="line"><a name="l00127"></a><span class="lineno">  127</span>&#160;    mc = select(0.0f, mc, mc &gt; (float4)strength_thresh);</div><div class="line"><a name="l00128"></a><span class="lineno">  128</span>&#160;</div><div class="line"><a name="l00129"></a><span class="lineno">  129</span>&#160;    vstore4(mc, 0, (__global <span class="keywordtype">float</span> *)vc.ptr);</div><div class="line"><a name="l00130"></a><span class="lineno">  130</span>&#160;}</div><div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 433 <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#l00201">helpers.h:201</a></div></div>
 434 <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#l00073">helpers.h:73</a></div></div>
 435 <div class="ttc" id="helpers_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00032">helpers.h:32</a></div></div>
 436 <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#l00095">helpers.h:95</a></div></div>
 437 </div><!-- fragment -->
 438 </div>
 439 </div>
 440 <a class="anchor" id="a0f0af2add0a40f2f4b8a14f409186a02"></a>
 441 <div class="memitem">
 442 <div class="memproto">
 443       <table class="memname">
 444         <tr>
 445           <td class="memname">__kernel void harris_score_5x5 </td>
 446           <td>(</td>
 447           <td class="paramtype">__global uchar *&#160;</td>
 448           <td class="paramname"><em>src_gx_ptr</em>, </td>
 449         </tr>
 450         <tr>
 451           <td class="paramkey"></td>
 452           <td></td>
 453           <td class="paramtype">uint&#160;</td>
 454           <td class="paramname"><em>src_gx_stride_x</em>, </td>
 455         </tr>
 456         <tr>
 457           <td class="paramkey"></td>
 458           <td></td>
 459           <td class="paramtype">uint&#160;</td>
 460           <td class="paramname"><em>src_gx_step_x</em>, </td>
 461         </tr>
 462         <tr>
 463           <td class="paramkey"></td>
 464           <td></td>
 465           <td class="paramtype">uint&#160;</td>
 466           <td class="paramname"><em>src_gx_stride_y</em>, </td>
 467         </tr>
 468         <tr>
 469           <td class="paramkey"></td>
 470           <td></td>
 471           <td class="paramtype">uint&#160;</td>
 472           <td class="paramname"><em>src_gx_step_y</em>, </td>
 473         </tr>
 474         <tr>
 475           <td class="paramkey"></td>
 476           <td></td>
 477           <td class="paramtype">uint&#160;</td>
 478           <td class="paramname"><em>src_gx_offset_first_element_in_bytes</em>, </td>
 479         </tr>
 480         <tr>
 481           <td class="paramkey"></td>
 482           <td></td>
 483           <td class="paramtype">__global uchar *&#160;</td>
 484           <td class="paramname"><em>src_gy_ptr</em>, </td>
 485         </tr>
 486         <tr>
 487           <td class="paramkey"></td>
 488           <td></td>
 489           <td class="paramtype">uint&#160;</td>
 490           <td class="paramname"><em>src_gy_stride_x</em>, </td>
 491         </tr>
 492         <tr>
 493           <td class="paramkey"></td>
 494           <td></td>
 495           <td class="paramtype">uint&#160;</td>
 496           <td class="paramname"><em>src_gy_step_x</em>, </td>
 497         </tr>
 498         <tr>
 499           <td class="paramkey"></td>
 500           <td></td>
 501           <td class="paramtype">uint&#160;</td>
 502           <td class="paramname"><em>src_gy_stride_y</em>, </td>
 503         </tr>
 504         <tr>
 505           <td class="paramkey"></td>
 506           <td></td>
 507           <td class="paramtype">uint&#160;</td>
 508           <td class="paramname"><em>src_gy_step_y</em>, </td>
 509         </tr>
 510         <tr>
 511           <td class="paramkey"></td>
 512           <td></td>
 513           <td class="paramtype">uint&#160;</td>
 514           <td class="paramname"><em>src_gy_offset_first_element_in_bytes</em>, </td>
 515         </tr>
 516         <tr>
 517           <td class="paramkey"></td>
 518           <td></td>
 519           <td class="paramtype">__global uchar *&#160;</td>
 520           <td class="paramname"><em>vc_ptr</em>, </td>
 521         </tr>
 522         <tr>
 523           <td class="paramkey"></td>
 524           <td></td>
 525           <td class="paramtype">uint&#160;</td>
 526           <td class="paramname"><em>vc_stride_x</em>, </td>
 527         </tr>
 528         <tr>
 529           <td class="paramkey"></td>
 530           <td></td>
 531           <td class="paramtype">uint&#160;</td>
 532           <td class="paramname"><em>vc_step_x</em>, </td>
 533         </tr>
 534         <tr>
 535           <td class="paramkey"></td>
 536           <td></td>
 537           <td class="paramtype">uint&#160;</td>
 538           <td class="paramname"><em>vc_stride_y</em>, </td>
 539         </tr>
 540         <tr>
 541           <td class="paramkey"></td>
 542           <td></td>
 543           <td class="paramtype">uint&#160;</td>
 544           <td class="paramname"><em>vc_step_y</em>, </td>
 545         </tr>
 546         <tr>
 547           <td class="paramkey"></td>
 548           <td></td>
 549           <td class="paramtype">uint&#160;</td>
 550           <td class="paramname"><em>vc_offset_first_element_in_bytes</em>, </td>
 551         </tr>
 552         <tr>
 553           <td class="paramkey"></td>
 554           <td></td>
 555           <td class="paramtype">float&#160;</td>
 556           <td class="paramname"><em>sensitivity</em>, </td>
 557         </tr>
 558         <tr>
 559           <td class="paramkey"></td>
 560           <td></td>
 561           <td class="paramtype">float&#160;</td>
 562           <td class="paramname"><em>strength_thresh</em>, </td>
 563         </tr>
 564         <tr>
 565           <td class="paramkey"></td>
 566           <td></td>
 567           <td class="paramtype">float&#160;</td>
 568           <td class="paramname"><em>pow4_normalization_factor</em>&#160;</td>
 569         </tr>
 570         <tr>
 571           <td></td>
 572           <td>)</td>
 573           <td></td><td></td>
 574         </tr>
 575       </table>
 576 </div><div class="memdoc">
 577
 578 <p>Function running harris score on 5x5 block size. </p>
 579 <dl class="section attention"><dt>Attention</dt><dd>: The input data type should be passed using a compile option -DDATA_TYPE. Supported types: short and int. e.g. -DDATA_TYPE=short.</dd></dl>
 580 <dl class="params"><dt>Parameters</dt><dd>
 581   <table class="params">
 582     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_ptr</td><td>Pointer to the first source image. Supported data types: S16, S32 </td></tr>
 583     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
 584     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_step_x</td><td>src_gx_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 585     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
 586     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_step_y</td><td>src_gx_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 587     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 588     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_ptr</td><td>Pointer to the second source image. Supported data types: S16, S32 </td></tr>
 589     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 590     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_step_x</td><td>src_gy_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 591     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 592     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_step_y</td><td>src_gy_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 593     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 594     <tr><td class="paramdir">[out]</td><td class="paramname">vc_ptr</td><td>Pointer to the destination image. Supported data types: F32 </td></tr>
 595     <tr><td class="paramdir">[in]</td><td class="paramname">vc_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 596     <tr><td class="paramdir">[in]</td><td class="paramname">vc_step_x</td><td>vc_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 597     <tr><td class="paramdir">[in]</td><td class="paramname">vc_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 598     <tr><td class="paramdir">[in]</td><td class="paramname">vc_step_y</td><td>vc_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 599     <tr><td class="paramdir">[in]</td><td class="paramname">vc_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 600     <tr><td class="paramdir">[in]</td><td class="paramname">sensitivity</td><td>Sensitivity threshold k from the Harris-Stephens equation </td></tr>
 601     <tr><td class="paramdir">[in]</td><td class="paramname">strength_thresh</td><td>Minimum threshold with which to eliminate Harris Corner scores </td></tr>
 602     <tr><td class="paramdir">[in]</td><td class="paramname">pow4_normalization_factor</td><td>Normalization factor to apply harris score </td></tr>
 603   </table>
 604   </dd>
 605 </dl>
 606
 607 <p>Definition at line <a class="el" href="harris__corners_8cl_source.xhtml#l00210">210</a> of file <a class="el" href="harris__corners_8cl_source.xhtml">harris_corners.cl</a>.</p>
 608
 609 <p>References <a class="el" href="helpers_8h_source.xhtml#l00073">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="harris__corners_8cl_source.xhtml#l00138">harris_score_1x5()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>.</p>
 610 <div class="fragment"><div class="line"><a name="l00217"></a><span class="lineno">  217</span>&#160;{</div><div class="line"><a name="l00218"></a><span class="lineno">  218</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> src_gx = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src_gx);</div><div class="line"><a name="l00219"></a><span class="lineno">  219</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> src_gy = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src_gy);</div><div class="line"><a name="l00220"></a><span class="lineno">  220</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> vc     = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(vc);</div><div class="line"><a name="l00221"></a><span class="lineno">  221</span>&#160;</div><div class="line"><a name="l00222"></a><span class="lineno">  222</span>&#160;    <span class="comment">/* Gx^2, Gy^2 and Gx*Gy */</span></div><div class="line"><a name="l00223"></a><span class="lineno">  223</span>&#160;    float16 res = (float16)0.0f;</div><div class="line"><a name="l00224"></a><span class="lineno">  224</span>&#160;</div><div class="line"><a name="l00225"></a><span class="lineno">  225</span>&#160;    <span class="comment">/* Compute row */</span></div><div class="line"><a name="l00226"></a><span class="lineno">  226</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = -2; i &lt; 3; i++)</div><div class="line"><a name="l00227"></a><span class="lineno">  227</span>&#160;    {</div><div class="line"><a name="l00228"></a><span class="lineno">  228</span>&#160;        res += <a class="code" href="harris__corners_8cl.xhtml#a71d10f5d9e840b6d270620a2cd856926">harris_score_1x5</a>(&amp;src_gx, &amp;src_gy, i);</div><div class="line"><a name="l00229"></a><span class="lineno">  229</span>&#160;    }</div><div class="line"><a name="l00230"></a><span class="lineno">  230</span>&#160;</div><div class="line"><a name="l00231"></a><span class="lineno">  231</span>&#160;    float4 gx2  = res.s0123;</div><div class="line"><a name="l00232"></a><span class="lineno">  232</span>&#160;    float4 gy2  = res.s4567;</div><div class="line"><a name="l00233"></a><span class="lineno">  233</span>&#160;    float4 gxgy = res.s89AB;</div><div class="line"><a name="l00234"></a><span class="lineno">  234</span>&#160;</div><div class="line"><a name="l00235"></a><span class="lineno">  235</span>&#160;    <span class="comment">/* Compute trace and determinant */</span></div><div class="line"><a name="l00236"></a><span class="lineno">  236</span>&#160;    float4 trace = gx2 + gy2;</div><div class="line"><a name="l00237"></a><span class="lineno">  237</span>&#160;    float4 det   = gx2 * gy2 - (gxgy * gxgy);</div><div class="line"><a name="l00238"></a><span class="lineno">  238</span>&#160;</div><div class="line"><a name="l00239"></a><span class="lineno">  239</span>&#160;    <span class="comment">/* Compute harris score */</span></div><div class="line"><a name="l00240"></a><span class="lineno">  240</span>&#160;    float4 mc = (det - (sensitivity * (trace * trace))) * pow4_normalization_factor;</div><div class="line"><a name="l00241"></a><span class="lineno">  241</span>&#160;</div><div class="line"><a name="l00242"></a><span class="lineno">  242</span>&#160;    mc = select(0.0f, mc, mc &gt; (float4)strength_thresh);</div><div class="line"><a name="l00243"></a><span class="lineno">  243</span>&#160;</div><div class="line"><a name="l00244"></a><span class="lineno">  244</span>&#160;    vstore4(mc, 0, (__global <span class="keywordtype">float</span> *)vc.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00245"></a><span class="lineno">  245</span>&#160;}</div><div class="ttc" id="harris__corners_8cl_xhtml_a71d10f5d9e840b6d270620a2cd856926"><div class="ttname"><a href="harris__corners_8cl.xhtml#a71d10f5d9e840b6d270620a2cd856926">harris_score_1x5</a></div><div class="ttdeci">float16 harris_score_1x5(Image *src_gx, Image *src_gy, int row)</div><div class="ttdoc">Function for calculating harris score 1x5. </div><div class="ttdef"><b>Definition:</b> <a href="harris__corners_8cl_source.xhtml#l00138">harris_corners.cl:138</a></div></div>
 611 <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#l00073">helpers.h:73</a></div></div>
 612 <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#l00095">helpers.h:95</a></div></div>
 613 <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00097">helpers.h:97</a></div></div>
 614 </div><!-- fragment -->
 615 </div>
 616 </div>
 617 <a class="anchor" id="a468ac2728816485f017f51faeb0a7d65"></a>
 618 <div class="memitem">
 619 <div class="memproto">
 620       <table class="memname">
 621         <tr>
 622           <td class="memname">__kernel void harris_score_7x7 </td>
 623           <td>(</td>
 624           <td class="paramtype">__global uchar *&#160;</td>
 625           <td class="paramname"><em>src_gx_ptr</em>, </td>
 626         </tr>
 627         <tr>
 628           <td class="paramkey"></td>
 629           <td></td>
 630           <td class="paramtype">uint&#160;</td>
 631           <td class="paramname"><em>src_gx_stride_x</em>, </td>
 632         </tr>
 633         <tr>
 634           <td class="paramkey"></td>
 635           <td></td>
 636           <td class="paramtype">uint&#160;</td>
 637           <td class="paramname"><em>src_gx_step_x</em>, </td>
 638         </tr>
 639         <tr>
 640           <td class="paramkey"></td>
 641           <td></td>
 642           <td class="paramtype">uint&#160;</td>
 643           <td class="paramname"><em>src_gx_stride_y</em>, </td>
 644         </tr>
 645         <tr>
 646           <td class="paramkey"></td>
 647           <td></td>
 648           <td class="paramtype">uint&#160;</td>
 649           <td class="paramname"><em>src_gx_step_y</em>, </td>
 650         </tr>
 651         <tr>
 652           <td class="paramkey"></td>
 653           <td></td>
 654           <td class="paramtype">uint&#160;</td>
 655           <td class="paramname"><em>src_gx_offset_first_element_in_bytes</em>, </td>
 656         </tr>
 657         <tr>
 658           <td class="paramkey"></td>
 659           <td></td>
 660           <td class="paramtype">__global uchar *&#160;</td>
 661           <td class="paramname"><em>src_gy_ptr</em>, </td>
 662         </tr>
 663         <tr>
 664           <td class="paramkey"></td>
 665           <td></td>
 666           <td class="paramtype">uint&#160;</td>
 667           <td class="paramname"><em>src_gy_stride_x</em>, </td>
 668         </tr>
 669         <tr>
 670           <td class="paramkey"></td>
 671           <td></td>
 672           <td class="paramtype">uint&#160;</td>
 673           <td class="paramname"><em>src_gy_step_x</em>, </td>
 674         </tr>
 675         <tr>
 676           <td class="paramkey"></td>
 677           <td></td>
 678           <td class="paramtype">uint&#160;</td>
 679           <td class="paramname"><em>src_gy_stride_y</em>, </td>
 680         </tr>
 681         <tr>
 682           <td class="paramkey"></td>
 683           <td></td>
 684           <td class="paramtype">uint&#160;</td>
 685           <td class="paramname"><em>src_gy_step_y</em>, </td>
 686         </tr>
 687         <tr>
 688           <td class="paramkey"></td>
 689           <td></td>
 690           <td class="paramtype">uint&#160;</td>
 691           <td class="paramname"><em>src_gy_offset_first_element_in_bytes</em>, </td>
 692         </tr>
 693         <tr>
 694           <td class="paramkey"></td>
 695           <td></td>
 696           <td class="paramtype">__global uchar *&#160;</td>
 697           <td class="paramname"><em>vc_ptr</em>, </td>
 698         </tr>
 699         <tr>
 700           <td class="paramkey"></td>
 701           <td></td>
 702           <td class="paramtype">uint&#160;</td>
 703           <td class="paramname"><em>vc_stride_x</em>, </td>
 704         </tr>
 705         <tr>
 706           <td class="paramkey"></td>
 707           <td></td>
 708           <td class="paramtype">uint&#160;</td>
 709           <td class="paramname"><em>vc_step_x</em>, </td>
 710         </tr>
 711         <tr>
 712           <td class="paramkey"></td>
 713           <td></td>
 714           <td class="paramtype">uint&#160;</td>
 715           <td class="paramname"><em>vc_stride_y</em>, </td>
 716         </tr>
 717         <tr>
 718           <td class="paramkey"></td>
 719           <td></td>
 720           <td class="paramtype">uint&#160;</td>
 721           <td class="paramname"><em>vc_step_y</em>, </td>
 722         </tr>
 723         <tr>
 724           <td class="paramkey"></td>
 725           <td></td>
 726           <td class="paramtype">uint&#160;</td>
 727           <td class="paramname"><em>vc_offset_first_element_in_bytes</em>, </td>
 728         </tr>
 729         <tr>
 730           <td class="paramkey"></td>
 731           <td></td>
 732           <td class="paramtype">float&#160;</td>
 733           <td class="paramname"><em>sensitivity</em>, </td>
 734         </tr>
 735         <tr>
 736           <td class="paramkey"></td>
 737           <td></td>
 738           <td class="paramtype">float&#160;</td>
 739           <td class="paramname"><em>strength_thresh</em>, </td>
 740         </tr>
 741         <tr>
 742           <td class="paramkey"></td>
 743           <td></td>
 744           <td class="paramtype">float&#160;</td>
 745           <td class="paramname"><em>pow4_normalization_factor</em>&#160;</td>
 746         </tr>
 747         <tr>
 748           <td></td>
 749           <td>)</td>
 750           <td></td><td></td>
 751         </tr>
 752       </table>
 753 </div><div class="memdoc">
 754
 755 <p>Function running harris score on 7x7 block size. </p>
 756 <dl class="section attention"><dt>Attention</dt><dd>: The input data type should be passed using a compile option -DDATA_TYPE. Supported types: short and int. e.g. -DDATA_TYPE=short.</dd></dl>
 757 <dl class="params"><dt>Parameters</dt><dd>
 758   <table class="params">
 759     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_ptr</td><td>Pointer to the first source image. Supported data types: S16, S32 </td></tr>
 760     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
 761     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_step_x</td><td>src_gx_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 762     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
 763     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_step_y</td><td>src_gx_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 764     <tr><td class="paramdir">[in]</td><td class="paramname">src_gx_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 765     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_ptr</td><td>Pointer to the second source image. Supported data types: S16, S32 </td></tr>
 766     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 767     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_step_x</td><td>src_gy_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 768     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 769     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_step_y</td><td>src_gy_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 770     <tr><td class="paramdir">[in]</td><td class="paramname">src_gy_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 771     <tr><td class="paramdir">[out]</td><td class="paramname">vc_ptr</td><td>Pointer to the destination image. Supported data types: F32 </td></tr>
 772     <tr><td class="paramdir">[in]</td><td class="paramname">vc_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
 773     <tr><td class="paramdir">[in]</td><td class="paramname">vc_step_x</td><td>vc_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 774     <tr><td class="paramdir">[in]</td><td class="paramname">vc_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
 775     <tr><td class="paramdir">[in]</td><td class="paramname">vc_step_y</td><td>vc_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 776     <tr><td class="paramdir">[in]</td><td class="paramname">vc_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 777     <tr><td class="paramdir">[in]</td><td class="paramname">sensitivity</td><td>Sensitivity threshold k from the Harris-Stephens equation </td></tr>
 778     <tr><td class="paramdir">[in]</td><td class="paramname">strength_thresh</td><td>Minimum threshold with which to eliminate Harris Corner scores </td></tr>
 779     <tr><td class="paramdir">[in]</td><td class="paramname">pow4_normalization_factor</td><td>Normalization factor to apply harris score </td></tr>
 780   </table>
 781   </dd>
 782 </dl>
 783
 784 <p>Definition at line <a class="el" href="harris__corners_8cl_source.xhtml#l00341">341</a> of file <a class="el" href="harris__corners_8cl_source.xhtml">harris_corners.cl</a>.</p>
 785
 786 <p>References <a class="el" href="helpers_8h_source.xhtml#l00073">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="harris__corners_8cl_source.xhtml#l00253">harris_score_1x7()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>.</p>
 787 <div class="fragment"><div class="line"><a name="l00348"></a><span class="lineno">  348</span>&#160;{</div><div class="line"><a name="l00349"></a><span class="lineno">  349</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> src_gx = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src_gx);</div><div class="line"><a name="l00350"></a><span class="lineno">  350</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> src_gy = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src_gy);</div><div class="line"><a name="l00351"></a><span class="lineno">  351</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a> vc     = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(vc);</div><div class="line"><a name="l00352"></a><span class="lineno">  352</span>&#160;</div><div class="line"><a name="l00353"></a><span class="lineno">  353</span>&#160;    <span class="comment">/* Gx^2, Gy^2 and Gx*Gy */</span></div><div class="line"><a name="l00354"></a><span class="lineno">  354</span>&#160;    float16 res = (float16)0.0f;</div><div class="line"><a name="l00355"></a><span class="lineno">  355</span>&#160;</div><div class="line"><a name="l00356"></a><span class="lineno">  356</span>&#160;    <span class="comment">/* Compute row */</span></div><div class="line"><a name="l00357"></a><span class="lineno">  357</span>&#160;    <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i = -3; i &lt; 4; i++)</div><div class="line"><a name="l00358"></a><span class="lineno">  358</span>&#160;    {</div><div class="line"><a name="l00359"></a><span class="lineno">  359</span>&#160;        res += <a class="code" href="harris__corners_8cl.xhtml#a2fadfd6378605824bb7926e1ac0123fb">harris_score_1x7</a>(&amp;src_gx, &amp;src_gy, i);</div><div class="line"><a name="l00360"></a><span class="lineno">  360</span>&#160;    }</div><div class="line"><a name="l00361"></a><span class="lineno">  361</span>&#160;</div><div class="line"><a name="l00362"></a><span class="lineno">  362</span>&#160;    float4 gx2  = res.s0123;</div><div class="line"><a name="l00363"></a><span class="lineno">  363</span>&#160;    float4 gy2  = res.s4567;</div><div class="line"><a name="l00364"></a><span class="lineno">  364</span>&#160;    float4 gxgy = res.s89AB;</div><div class="line"><a name="l00365"></a><span class="lineno">  365</span>&#160;</div><div class="line"><a name="l00366"></a><span class="lineno">  366</span>&#160;    <span class="comment">/* Compute trace and determinant */</span></div><div class="line"><a name="l00367"></a><span class="lineno">  367</span>&#160;    float4 trace = gx2 + gy2;</div><div class="line"><a name="l00368"></a><span class="lineno">  368</span>&#160;    float4 det   = gx2 * gy2 - (gxgy * gxgy);</div><div class="line"><a name="l00369"></a><span class="lineno">  369</span>&#160;</div><div class="line"><a name="l00370"></a><span class="lineno">  370</span>&#160;    <span class="comment">/* Compute harris score */</span></div><div class="line"><a name="l00371"></a><span class="lineno">  371</span>&#160;    float4 mc = (det - (sensitivity * (trace * trace))) * pow4_normalization_factor;</div><div class="line"><a name="l00372"></a><span class="lineno">  372</span>&#160;</div><div class="line"><a name="l00373"></a><span class="lineno">  373</span>&#160;    mc = select(0.0f, mc, mc &gt; (float4)strength_thresh);</div><div class="line"><a name="l00374"></a><span class="lineno">  374</span>&#160;</div><div class="line"><a name="l00375"></a><span class="lineno">  375</span>&#160;    vstore4(mc, 0, (__global <span class="keywordtype">float</span> *)vc.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00376"></a><span class="lineno">  376</span>&#160;}</div><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#l00073">helpers.h:73</a></div></div>
 788 <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#l00095">helpers.h:95</a></div></div>
 789 <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00097">helpers.h:97</a></div></div>
 790 <div class="ttc" id="harris__corners_8cl_xhtml_a2fadfd6378605824bb7926e1ac0123fb"><div class="ttname"><a href="harris__corners_8cl.xhtml#a2fadfd6378605824bb7926e1ac0123fb">harris_score_1x7</a></div><div class="ttdeci">float16 harris_score_1x7(Image *src_gx, Image *src_gy, int row)</div><div class="ttdoc">Function for calculating harris score 1x7. </div><div class="ttdef"><b>Definition:</b> <a href="harris__corners_8cl_source.xhtml#l00253">harris_corners.cl:253</a></div></div>
 791 </div><!-- fragment -->
 792 </div>
 793 </div>
 794 </div><!-- contents -->
 795 </div><!-- doc-content -->
 796 <!-- start footer part -->
 797 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
 798   <ul>
 799     <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.xhtml">src</a></li><li class="navelem"><a class="el" href="dir_aebb8dcc11953d78e620bbef0b9e2183.xhtml">core</a></li><li class="navelem"><a class="el" href="dir_8c278f79c760e5c5fbd911f9870614c1.xhtml">CL</a></li><li class="navelem"><a class="el" href="dir_25885286e9dad4fa105b7b25a8031bbf.xhtml">cl_kernels</a></li><li class="navelem"><a class="el" href="harris__corners_8cl.xhtml">harris_corners.cl</a></li>
 800     <li class="footer">Generated on Wed Apr 12 2017 14:26:05 for ARM Compute Library by
 801     <a href="http://www.doxygen.org/index.html">
 802     <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.11 </li>
 803   </ul>
 804 </div>
 805 </body>
 806 </html>