Hi

I am trying to capture video file and save to the local once the eyes are detected using opencv. It would stop recording video when eyes are not present. The code could be compiled but it is unable to get the result. It always exits with code -1. Below is my code.

#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\objdetect\objdetect.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\highgui\highgui.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\imgproc\imgproc.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv\cv.h>

#include <iostream>
#include <stdio.h>

using namespace std;
using namespace cv;

int numFaces;
int numEyes;

 /** Function Headers */
 void detectAndDisplay( Mat frame );
 int videoRecord ();
 /** Global variables */
 String face_cascade_name = "haarcascade_frontalface_alt.xml";
 String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";
 CascadeClassifier face_cascade;
 CascadeClassifier eyes_cascade;
 string window_name = "Capture - Face detection";
 RNG rng(12345);
 /** @function main */
 int main( int argc, const char** argv )
 {
   CvCapture* capture;
   Mat frame;
   //-- 1. Load the cascades
   if( !face_cascade.load( face_cascade_name ) ){ printf("--(!)Error loading\n"); return -1; };
   if( !eyes_cascade.load( eyes_cascade_name ) ){ printf("--(!)Error loading\n"); return -1; };
   //-- 2. Read the video stream
   capture = cvCaptureFromCAM( -1 );
   if( capture )
   {
     while( true )
     {
       frame = cvQueryFrame( capture );
     //-- 3. Apply the classifier to the frame
       if( !frame.empty() )
       { {
        detectAndDisplay( frame ); 
         videoRecord();
       }
       else
       { {
        printf(" --(!) No captured frame -- Break!"); break; }

         //pause for 33ms        
         if (waitKey(33) == 27) 
         break; 
       }
   } 
   return 0;
 }

/** @function detectAndDisplay */
void detectAndDisplay( Mat frame )
{
  std::vector<Rect> faces;
  Mat frame_gray;

  cvtColor( frame, frame_gray, CV_BGR2GRAY );
  equalizeHist( frame_gray, frame_gray );

  //-- Detect faces
  face_cascade.detectMultiScale( frame_gray, faces, 1.1, 2, 0|CV_HAAR_SCALE_IMAGE, Size(30, 30) );

  for( int i = 0; i < faces.size(); i++ )
  {
   //draw face
    Point center( faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5 );
    ellipse( frame, center, Size( faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0 );

    //get region of interest
    Mat faceROI = frame_gray( faces[i] );
    std::vector<Rect> eyes;

    //-- In each face, detect eyes
    eyes_cascade.detectMultiScale( faceROI, eyes, 1.1, 2, 0 |CV_HAAR_SCALE_IMAGE, Size(30, 30) );

    for( int j = 0; j < eyes.size(); j++ )
     {
      //draw eyes
       Point center( faces[i].x + eyes[j].x + eyes[j].width*0.5, faces[i].y + eyes[j].y + eyes[j].height*0.5 );
       int radius = cvRound( (eyes[j].width + eyes[j].height)*0.25 );
       circle( frame, center, radius, Scalar( 255, 0, 0 ), 4, 8, 0 );
     }

     //save number of faces/eyes detected
     numFaces = faces.size();
     numEyes = eyes.size();  
  }
  //-- Show what you got
  imshow( window_name, frame );
 }

int videoRecord ()
 {
     CvCapture *capture;
     IplImage *img;
     CvVideoWriter *writer;

     int       key = 0;

     // initialize camera
     capture = cvCaptureFromCAM( 0 );

     // always check
     assert( capture );

     int color = 1; // 0 for black and white

    // get the frame size
    CvSize size = cvSize((int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH),(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT));

    writer = cvCreateVideoWriter("out.avi", -1 , 10 , size, color);

    while(numEyes != 0) 
    {
        // get a frame
        img = cvQueryFrame( capture );

        // always check
        if( !img ) break;

        cvWriteFrame( writer, img );        
    }

    // free memory
    cvReleaseVideoWriter( &writer );
    cvReleaseCapture( &capture );


  return 0;
 }

Hi

I am trying to capture video file and save to the local once the eyes are detected using opencv. It would stop recording video when eyes are not present. The code could be compiled but it is unable to get the result. It always exits with code -1. Below is my code.

#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\objdetect\objdetect.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\highgui\highgui.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\imgproc\imgproc.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv\cv.h>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\core\core.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\videostab\optical_flow.hpp>
#include <C:\Users\AM\Desktop\Project\opencv\build\include\opencv2\videostab\videostab.hpp>


#include <iostream>
#include <stdio.h>

 using namespace std;
 using namespace cv;

int numFaces;
int numEyes;

 /** Function Headers */
 void detectAndDisplay( Mat frame );
int  void videoRecord ();
 /** Global variables */
 String face_cascade_name = "haarcascade_frontalface_alt.xml";
"C:/Users/AM/Desktop/Project/opencv/data/haarcascades/haarcascade_frontalface_alt.xml";
 String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";
"C:/Users/AM/Desktop/Project/opencv/data/haarcascades/haarcascade_eye_tree_eyeglasses.xml";

 CascadeClassifier face_cascade;
 CascadeClassifier eyes_cascade;
 string window_name = "Capture - Face detection";
 RNG rng(12345);

 VideoCapture capture;
 VideoWriter record;

 /** @function main */
 int main( int argc, const char** argv )
 {
  // CvCapture* capture;
   Mat frame;
   //-- 1. Load the cascades
   if( !face_cascade.load( face_cascade_name ) ){ printf("--(!)Error loading\n"); return -1; };
   if( !eyes_cascade.load( eyes_cascade_name ) ){ printf("--(!)Error loading\n"); return -1; };
   //-- 2. Read the video stream
  capture  capture.open(0);// = cvCaptureFromCAM( -1 );
   if( capture capture.isOpened() )
   {
     while( true )
     {
      frame  //frame = cvQueryFrame( capture );
       capture >> frame;

   //-- 3. Apply the classifier to the frame
       if( !frame.empty() )
      {
 { 
           detectAndDisplay( frame ); 
          while (numEyes == 2)
           {
            videoRecord();
       }
       }
       else
      {
         { printf(" --(!) No captured frame -- Break!"); break; }

         //pause for 33ms        
         if (waitKey(33) == 27) 
         break; 
       }
   } 
   return 0;
 }

/** @function detectAndDisplay */
void detectAndDisplay( Mat frame )
{
  std::vector<Rect> faces;
  Mat frame_gray;

  cvtColor( frame, frame_gray, CV_BGR2GRAY );
  equalizeHist( frame_gray, frame_gray );

  //-- Detect faces
  face_cascade.detectMultiScale( frame_gray, faces, 1.1, 2, 0|CV_HAAR_SCALE_IMAGE, Size(30, 30) );

   for( int i = 0; i < faces.size(); i++ )
  {
   //draw face
    Point center( faces[i].x + faces[i].width*0.5, faces[i].y + faces[i].height*0.5 );
    ellipse( frame, center, Size( faces[i].width*0.5, faces[i].height*0.5), 0, 0, 360, Scalar( 255, 0, 255 ), 4, 8, 0 );

    //get region of interest
    Mat faceROI = frame_gray( faces[i] );
    std::vector<Rect> eyes;

    //-- In each face, detect eyes
    eyes_cascade.detectMultiScale( faceROI, eyes, 1.1, 2, 0 |CV_HAAR_SCALE_IMAGE, Size(30, 30) );

    for( int j = 0; j < eyes.size(); j++ )
     {
      //draw eyes
       Point center( faces[i].x + eyes[j].x + eyes[j].width*0.5, faces[i].y + eyes[j].y + eyes[j].height*0.5 );
       int radius = cvRound( (eyes[j].width + eyes[j].height)*0.25 );
       circle( frame, center, radius, Scalar( 255, 0, 0 ), 4, 8, 0 );
     }

     cout<<"numEyes =" << numEyes;
     numFaces = faces.size();
     numEyes = eyes.size();


  }
  //-- Show what you got
  imshow( window_name, frame );
  //save number of faces/eyes detected
     numFaces = faces.size();
     numEyes = eyes.size();  
   }
  //-- Show what you got
  imshow( window_name, frame );
 }

int 
void videoRecord ()
 {
     CvCapture *capture;
     IplImage *img;
     CvVideoWriter *writer;

     int       key = 0;

     if(!capture.isOpened())  // initialize camera
   check if we succeeded
      {
        printf("Camera failed to open");
      }

   Mat frame;
  capture = cvCaptureFromCAM( 0 );

     // always check
     assert( capture );

     int color = 1; // 0 for black and white

    >> frame; // get the first frame for size
    CvSize size = cvSize((int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_WIDTH),(int)cvGetCaptureProperty( capture, CV_CAP_PROP_FRAME_HEIGHT));

    writer = cvCreateVideoWriter("out.avi", -1 , 10 , size, color);

    while(numEyes != 0) 
  // record video
  record.open("Intruder.avi", CV_FOURCC('M','J','P','G'), 30, frame.size(), true);
  if( !record.isOpened() ) 
  {
  printf("VideoWriter failed to open!\n");
  }      

 for(int i=0; i<5000000; i++)
  {
         // get a frame
        img = cvQueryFrame( new frame from camera
          capture );

>> frame; 

         // always check
        if( !img ) break;

        cvWriteFrame( writer, img );        
  add frame to recorded video
          record << frame;         
  }

    // free memory
    cvReleaseVideoWriter( &writer );
    cvReleaseCapture( &capture );


  return 0;
 }