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  1.  
  2. #include "opencv2\opencv.hpp"
  3.  
  4.  
  5.  
  6. #include <iostream>
  7. #include <stdio.h>
  8.  
  9. using namespace std;
  10. using namespace cv;
  11.  
  12. /** Function Headers */
  13. void detectAndDisplay( Mat frame );
  14.  
  15. /** Global variables */
  16. String face_cascade_name = "haarcascade_frontalface_alt.xml";
  17. String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";
  18. CascadeClassifier face_cascade;
  19. CascadeClassifier eyes_cascade;
  20. string window_name = "Capture - Face detection";
  21. RNG rng(12345);
  22.  
  23. /** @function main */
  24. int main( int argc, const char** argv )
  25. {
  26.     VideoCapture capture;
  27.     Mat frame;
  28.  
  29.     //-- 1. Load the cascades
  30.     if( !face_cascade.load( face_cascade_name ) )
  31.     {
  32.         printf("--(!)Error loading\n");
  33.         return -1;
  34.     };
  35.     if( !eyes_cascade.load( eyes_cascade_name ) )
  36.     {
  37.         printf("--(!)Error loading\n");
  38.         return -1;
  39.     };
  40.  
  41.     //-- 2. Read the video stream
  42.     capture.open(0);
  43.     if( capture.isOpened() )
  44.     {
  45.         while( true )
  46.         {
  47.              capture >> frame;
  48.             //-- 3. Apply the classifier to the frame
  49.             if( !frame.empty() )
  50.             {
  51.                 detectAndDisplay( frame );
  52.             }
  53.             else
  54.             {
  55.                 printf(" --(!) No captured frame -- Break!");
  56.                 break;
  57.             }
  58.  
  59.             int c = waitKey(10);
  60.             if( (char)c == 'c' )
  61.             {
  62.                 break;
  63.             }
  64.         }
  65.     }
  66.     return 0;
  67. }
  68.  
  69. /** @function detectAndDisplay */
  70. void detectAndDisplay( Mat frame )
  71. {
  72.     std::vector<Rect> faces;
  73.     Mat frame_gray;
  74.  
  75.     cvtColor( frame, frame_gray, CV_BGR2GRAY );
  76.     equalizeHist( frame_gray, frame_gray );
  77.  
  78.     //-- Detect faces
  79.     face_cascade.detectMultiScale( frame_gray, faces, 1.1, 2, 0|CV_HAAR_SCALE_IMAGE, Size(30, 30) );
  80.  
  81.     for( int i = 0; i < faces.size(); i++ )
  82.     {
  83.         Point center( faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5 );
  84.         ellipse( frame, center, Size( faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0 );
  85.  
  86.         Mat faceROI = frame_gray( faces[i] );
  87.         std::vector<Rect> eyes;
  88.  
  89.         //-- In each face, detect eyes
  90.         eyes_cascade.detectMultiScale( faceROI, eyes, 1.1, 2, 0 |CV_HAAR_SCALE_IMAGE, Size(30, 30) );
  91.  
  92.         for( int j = 0; j < eyes.size(); j++ )
  93.         {
  94.             Point center( faces[i].x + eyes[j].x + eyes[j].width*0.5, faces[i].y + eyes[j].y + eyes[j].height*0.5 );
  95.             int radius = cvRound( (eyes[j].width + eyes[j].height)*0.25 );
  96.             circle( frame, center, radius, Scalar( 255, 0, 0 ), 4, 8, 0 );
  97.         }
  98.     }
  99.     //-- Show what you got
  100.     imshow( window_name, frame );
  101. }
  102.  
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https://ideone.com/SLlHH
language:
C++ (gcc 8.3)
created:
13 years ago
visibility:
public

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