image_8cpp-source.html

显著区域检测。求的图像中感兴趣区域的位置

<a name="l00151"></a>00151 <span class="comment">// ######################################################################</span>
<a name="l00152"></a><a class="code" href="classImage.html#1744e77216dece6f8150ddba16f57b1f">00152</a> <a class="code" href="classImage.html" title="Provides access and processing functions for an image.">Image</a> <a class="code" href="classImage.html#1744e77216dece6f8150ddba16f57b1f" title="Multiply all values by a scalar factor.">Image::operator*=</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> factor)
<a name="l00153"></a>00153 {
<a name="l00154"></a>00154   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(<a class="code" href="classImage.html#b87bf4b103cb5a9cf090f8729f362335" title="Returns whether the Image is initialized.">isInitialized</a>());
<a name="l00155"></a>00155   <span class="keywordflow">for</span> (<a class="code" href="classImage.html#01d14564f4b61f97d305e293716933cf" title="Read/write iterator.">iterator</a> ptr = <a class="code" href="classImage.html#9987bf538358f25470af7d628e97694a" title="Returns a read/write iterator to the beginning of the Image data.">beginw</a>(); ptr != <a class="code" href="classImage.html#6bd3897cec644d5fa71e3c10a0f8b393" title="Returns a read/write iterator to the one-past-the-end of the Image data.">endw</a>(); ++ptr)
<a name="l00156"></a>00156     *ptr *= factor;
<a name="l00157"></a>00157   <span class="keywordflow">return</span> *<span class="keyword">this</span>;
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159   
<a name="l00160"></a>00160 <span class="comment">// ######################################################################</span>
<a name="l00161"></a><a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba">00161</a> <span class="keywordtype">double</span> <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">Image::getVal</a>(<span class="keywordtype">int</span> index)<span class="keyword"> const</span>
<a name="l00162"></a>00162 <span class="keyword"></span>{
<a name="l00163"></a>00163   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(<a class="code" href="classImage.html#b87bf4b103cb5a9cf090f8729f362335" title="Returns whether the Image is initialized.">isInitialized</a>());
<a name="l00164"></a>00164   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(index &lt; <a class="code" href="classImage.html#9e8efb4cb518bc0ab1253ce8d5ab2783" title="Returns the number of pixels in the Image.">getSize</a>());
<a name="l00165"></a>00165   <span class="keywordflow">return</span> *(<a class="code" href="classImage.html#e0666b33daa7ba55e3348d4fff02356f" title="Returns a read-only iterator to the beginning of the Image data.">begin</a>()+index);
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167 
<a name="l00168"></a>00168 <span class="comment">// ######################################################################</span>
<a name="l00169"></a><a class="code" href="classImage.html#0356285c876ac4e8473bb7a3a5321cd0">00169</a> <span class="keywordtype">double</span> <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">Image::getVal</a>(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)<span class="keyword"> const</span>
<a name="l00170"></a>00170 <span class="keyword"></span>{
<a name="l00171"></a>00171   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(<a class="code" href="classImage.html#c48ef479772ddafdfe71ab179ac77019" title="Check if the coordinates are within the bounds of the Image.">coordsOK</a>(x,y));
<a name="l00172"></a>00172   <a class="code" href="classImage.html#f9f1ae298f5d8f8b44e4e34a72f61c2f" title="Read-only iterator.">const_iterator</a> ptr = <a class="code" href="classImage.html#e0666b33daa7ba55e3348d4fff02356f" title="Returns a read-only iterator to the beginning of the Image data.">begin</a>() + x * <a class="code" href="classImage.html#1cd7587f88b6932b5269051d1ba08ff9" title="Returns the height of the Image.">getHeight</a>() + y;
<a name="l00173"></a>00173   <span class="keywordflow">return</span> *ptr;
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175 
<a name="l00176"></a>00176 <span class="comment">// ######################################################################</span>
<a name="l00177"></a><a class="code" href="classImage.html#085cb560bd1ea0e54726baf7f42a9580">00177</a> <span class="keywordtype">void</span> <a class="code" href="classImage.html#085cb560bd1ea0e54726baf7f42a9580" title="Sets a pixel value by index.">Image::setVal</a>(<span class="keywordtype">int</span> index, <span class="keywordtype">double</span> val)
<a name="l00178"></a>00178 {
<a name="l00179"></a>00179   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(<a class="code" href="classImage.html#b87bf4b103cb5a9cf090f8729f362335" title="Returns whether the Image is initialized.">isInitialized</a>());
<a name="l00180"></a>00180   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(index &lt; <a class="code" href="classImage.html#9e8efb4cb518bc0ab1253ce8d5ab2783" title="Returns the number of pixels in the Image.">getSize</a>());
<a name="l00181"></a>00181   *(<a class="code" href="classImage.html#9987bf538358f25470af7d628e97694a" title="Returns a read/write iterator to the beginning of the Image data.">beginw</a>()+index) = val;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183   
<a name="l00184"></a>00184 <span class="comment">// ######################################################################</span>
<a name="l00185"></a><a class="code" href="classImage.html#ed735294341ad4aaebf581edb9ceef98">00185</a> <span class="keywordtype">void</span> <a class="code" href="classImage.html#085cb560bd1ea0e54726baf7f42a9580" title="Sets a pixel value by index.">Image::setVal</a>(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">double</span> val)
<a name="l00186"></a>00186 {
<a name="l00187"></a>00187   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(<a class="code" href="classImage.html#c48ef479772ddafdfe71ab179ac77019" title="Check if the coordinates are within the bounds of the Image.">coordsOK</a>(x,y));
<a name="l00188"></a>00188   <a class="code" href="classImage.html#01d14564f4b61f97d305e293716933cf" title="Read/write iterator.">iterator</a> ptr = <a class="code" href="classImage.html#9987bf538358f25470af7d628e97694a" title="Returns a read/write iterator to the beginning of the Image data.">beginw</a>() + x * <a class="code" href="classImage.html#1cd7587f88b6932b5269051d1ba08ff9" title="Returns the height of the Image.">getHeight</a>() + y;
<a name="l00189"></a>00189   *ptr = val;
<a name="l00190"></a>00190 }
<a name="l00191"></a>00191 
<a name="l00192"></a>00192 <span class="comment">// ######################################################################</span>
<a name="l00193"></a><a class="code" href="classImage.html#7a7cd0a9881bb7462b124d5d864c712c">00193</a> <span class="keywordtype">void</span> <a class="code" href="classImage.html#7a7cd0a9881bb7462b124d5d864c712c" title="Count and sum all local maxima above a threshold.">Image::getLocalMaxima</a>(<span class="keyword">const</span> <span class="keywordtype">double</span> thresh, <span class="keywordtype">int</span> *lm_num, <span class="keywordtype">double</span> *lm_sum)
<a name="l00194"></a>00194 {
<a name="l00195"></a>00195   <a class="code" href="mexLog_8h.html#092bd7bb2cb7fd9f483b6995cee61bc0">ASSERT</a>(<a class="code" href="classImage.html#b87bf4b103cb5a9cf090f8729f362335" title="Returns whether the Image is initialized.">isInitialized</a>());
<a name="l00196"></a>00196 
<a name="l00197"></a>00197   <span class="keyword">const</span> <span class="keywordtype">int</span> w = <a class="code" href="classImage.html#36bcae4838228d574738249a87dc4464" title="Returns the width of the Image.">getWidth</a>();
<a name="l00198"></a>00198   <span class="keyword">const</span> <span class="keywordtype">int</span> h = <a class="code" href="classImage.html#1cd7587f88b6932b5269051d1ba08ff9" title="Returns the height of the Image.">getHeight</a>();
<a name="l00199"></a>00199 
<a name="l00200"></a>00200 
<a name="l00201"></a>00201   <span class="comment">// then get the mean value of the local maxima:</span>
<a name="l00202"></a>00202   *lm_sum = 0.0; *lm_num = 0;
<a name="l00203"></a>00203   
<a name="l00204"></a>00204   <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 1; j &lt; h - 1; j ++)
<a name="l00205"></a>00205     <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; w - 1; i ++)
<a name="l00206"></a>00206       {
<a name="l00207"></a>00207         <span class="keywordtype">double</span> val = <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">getVal</a>(i,j);
<a name="l00208"></a>00208         <span class="keywordflow">if</span> (val &gt;= thresh &amp;&amp;
<a name="l00209"></a>00209             val &gt;= <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">getVal</a>(i-1, j) &amp;&amp;
<a name="l00210"></a>00210             val &gt;= <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">getVal</a>(i+1, j) &amp;&amp;
<a name="l00211"></a>00211             val &gt;= <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">getVal</a>(i, j+1) &amp;&amp;
<a name="l00212"></a>00212             val &gt;= <a class="code" href="classImage.html#dc33e09c67dba8139626448f4dfcfdba" title="Returns a pixel value by index.">getVal</a>(i, j-1))  <span class="comment">// local max</span>
<a name="l00213"></a>00213           {
<a name="l00214"></a>00214             *lm_sum += val;
<a name="l00215"></a>00215             (*lm_num)++;
<a name="l00216"></a>00216           }
<a name="l00217"></a>00217       }
<a name="l00218"></a>00218   <span class="keywordflow">return</span>;
<a name="l00219"></a>00219 }
<a name="l00220"></a>00220   
<a name="l00221"></a>00221 <span class="comment">// ######################################################################</span>
<a name="l00222"></a><a class="code" href="classImage.html#c48ef479772ddafdfe71ab179ac77019">00222</a> <span class="keywordtype">bool</span> <a class="code" href="classImage.html#c48ef479772ddafdfe71ab179ac77019" title="Check if the coordinates are within the bounds of the Image.">Image::coordsOK</a>(<span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y)<span class="keyword"> const</span>
<a name="l00223"></a>00223 <span class="keyword"></span>{
<a name="l00224"></a>00224   <span class="keywordflow">if</span> (!<a class="code" href="classImage.html#b87bf4b103cb5a9cf090f8729f362335" title="Returns whether the Image is initialized.">isInitialized</a>()) <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00225"></a>00225   
<a name="l00226"></a>00226   <span class="keywordflow">return</span> ((x &lt; <a class="code" href="classImage.html#36bcae4838228d574738249a87dc4464" title="Returns the width of the Image.">getWidth</a>()) &amp;&amp; (y &lt; <a class="code" href="classImage.html#1cd7587f88b6932b5269051d1ba08ff9" title="Returns the height of the Image.">getHeight</a>()));
<a name="l00227"></a>00227 }
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