LivingMachine/Doxy/html/facedetect_8c_source.html
2017-05-30 18:12:25 +02:00

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<div class="title">facedetect.c</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">// Sample Application to demonstrate how Face detection can be done as a part of your source code.</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;</div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment">// Include header files</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="preprocessor">#include &quot;cv.h&quot;</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="preprocessor">#include &quot;highgui.h&quot;</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;</div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="preprocessor">#include &lt;stdio.h&gt;</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="preprocessor">#include &lt;stdlib.h&gt;</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="preprocessor">#include &lt;string.h&gt;</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="preprocessor">#include &lt;math.h&gt;</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="preprocessor">#include &lt;float.h&gt;</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="preprocessor">#include &lt;limits.h&gt;</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="preprocessor">#include &lt;time.h&gt;</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="preprocessor">#include &lt;ctype.h&gt;</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;</div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;</div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment">// Create a string that contains the exact cascade name</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="keyword">const</span> <span class="keywordtype">char</span>* cascade_name =</div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="stringliteral">&quot;C:/Program Files/OpenCV/data/haarcascades/haarcascade_frontalface_alt.xml&quot;</span>;</div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment">/* &quot;haarcascade_profileface.xml&quot;;*/</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;</div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="comment">// Function prototype for detecting and drawing an object from an image</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="keywordtype">void</span> detect_and_draw( IplImage* image );</div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;</div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="comment">// Main function, defines the entry point for the program.</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;<span class="keywordtype">int</span> <a class="code" href="_kirby_track_8c.html#a0ddf1224851353fc92bfbff6f499fa97">main</a>( <span class="keywordtype">int</span> argc, <span class="keywordtype">char</span>** argv )</div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;{</div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160; <span class="comment">//Ouverture flux camera</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; CvCapture* capture = cvCaptureFromCAM( 0 );</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160; </div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="keywordflow">if</span>( !capture ){</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; printf(<span class="stringliteral">&quot;ERROR: capture is NULL \n&quot;</span> );</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; exit(EXIT_FAILURE);</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; }</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;<span class="comment">// Call the function to detect and draw the face positions</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160;detect_and_draw(img);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160;</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;<span class="comment">// Wait for user input before quitting the program</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160;cvWaitKey();</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="comment">// Release the image</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;cvReleaseImage(&amp;img);</div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160;</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;<span class="comment">// Destroy the window previously created with filename: &quot;result&quot;</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;cvDestroyWindow(<span class="stringliteral">&quot;result&quot;</span>);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;<span class="comment">// return 0 to indicate successfull execution of the program</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160;<span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;}</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="comment">// Function to detect and draw any faces that is present in an image</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160;<span class="keywordtype">void</span> detect_and_draw( IplImage* img )</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;{</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>&#160;<span class="comment">// Create memory for calculations</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;<span class="keyword">static</span> CvMemStorage* storage = 0;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160;<span class="comment">// Create a new Haar classifier</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;<span class="keyword">static</span> CvHaarClassifierCascade* cascade = 0;</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="keywordtype">int</span> scale = 1;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>&#160;<span class="comment">// Create a new image based on the input image</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>&#160;IplImage* temp = cvCreateImage( cvSize(img-&gt;width/scale,img-&gt;height/scale), 8, 3 );</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">// Create two points to represent the face locations</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;CvPoint pt1, pt2;</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160;<span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160;<span class="comment">// Load the [[HaarClassifierCascade]]</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160;cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;<span class="comment">// Check whether the cascade has loaded successfully. Else report and error and quit</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160;<span class="keywordflow">if</span>( !cascade )</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;fprintf( stderr, <span class="stringliteral">&quot;ERROR: Could not load classifier cascade\n&quot;</span> );</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;<span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160;}</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;<span class="comment">// Allocate the memory storage</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160;storage = cvCreateMemStorage(0);</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160;<span class="comment">// Create a new named window with title: result</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;cvNamedWindow( <span class="stringliteral">&quot;result&quot;</span>, 1 );</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160;</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160;<span class="comment">// Clear the memory storage which was used before</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160;cvClearMemStorage( storage );</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160;<span class="comment">// Find whether the cascade is loaded, to find the faces. If yes, then:</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160;<span class="keywordflow">if</span>( cascade )</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;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160;<span class="comment">// There can be more than one face in an image. So create a growable sequence of faces.</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160;<span class="comment">// Detect the objects and store them in the sequence</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160;CvSeq* faces = cvHaarDetectObjects( img, cascade, storage,</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160;1.1, 2, CV_HAAR_DO_CANNY_PRUNING,</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160;cvSize(40, 40) );</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160;<span class="comment">// Loop the number of faces found.</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160;<span class="keywordflow">for</span>( i = 0; i &lt; (faces ? faces-&gt;total : 0); i++ )</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160;{</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160;<span class="comment">// Create a new rectangle for drawing the face</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160;CvRect* r = (CvRect*)cvGetSeqElem( faces, i );</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160;<span class="comment">// Find the dimensions of the face,and scale it if necessary</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160;pt1.x = r-&gt;x*scale;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;pt2.x = (r-&gt;x+r-&gt;width)*scale;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>&#160;pt1.y = r-&gt;y*scale;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>&#160;pt2.y = (r-&gt;y+r-&gt;height)*scale;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>&#160;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>&#160;<span class="comment">// Draw the rectangle in the input image</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;cvRectangle( img, pt1, pt2, CV_RGB(255,0,0), 3, 8, 0 );</div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160;}</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160;}</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">// Show the image in the window named &quot;result&quot;</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>&#160;cvShowImage( <span class="stringliteral">&quot;result&quot;</span>, img );</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>&#160;</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>&#160;<span class="comment">// Release the temp image created.</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160;cvReleaseImage( &amp;temp );</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;}</div>
<div class="ttc" id="_kirby_track_8c_html_a0ddf1224851353fc92bfbff6f499fa97"><div class="ttname"><a href="_kirby_track_8c.html#a0ddf1224851353fc92bfbff6f499fa97">main</a></div><div class="ttdeci">int main(int argc, char *argv[])</div><div class="ttdoc">Entrée du programme. </div><div class="ttdef"><b>Definition:</b> <a href="_kirby_track_8c_source.html#l00164">KirbyTrack.c:164</a></div></div>
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