#include <stdio.h>
#include <opencv/cv.h>
#include <opencv/highgui.h>
 
int 
main(void)
{ 
    CvCapture *camHandler;
    IplImage *frame, *frame_copy = 0;
    static CvHaarClassifierCascade* cascade = 0;
    static CvMemStorage* storage = 0;
    const char* cascade_name = "/usr/share/opencv/haarcascades/haarcascade_mcs_eyepair_small.xml";
    CvSeq* eyes;
    CvPoint pt1, pt2;
    int i;
    double scale = 1.0;
    
    camHandler = cvCaptureFromCAM(-1);
    cascade = (CvHaarClassifierCascade*)cvLoad( cascade_name, 0, 0, 0 );
    storage = cvCreateMemStorage(0);
    cvNamedWindow("Output", 1);

    while(1) 
    {
        // grab our frame...
        cvGrabFrame(camHandler);
        frame = cvRetrieveFrame(camHandler,0);
        
        // copy the frame to frame_copy
        if( !frame_copy )
            frame_copy = cvCreateImage( cvSize(frame->width,frame->height),
                                        IPL_DEPTH_8U, frame->nChannels );
        // Check the origin of image. If top left, copy the image frame to frame_copy. 
        // this is taken from the example on the web...
        cvCopy( frame, frame_copy, 0 );

        // now, let's detect da image
        cvClearMemStorage( storage );
        eyes = cvHaarDetectObjects( frame_copy, cascade, storage,
                                            1.2, 2, CV_HAAR_DO_CANNY_PRUNING, 
                                            cvSize(10, 10));
                                            
        // Loop the number of eye pairs found.
        for( i = 0; i < (eyes ? eyes->total : 0); i++ )
        {
            // Create a new rectangle for drawing the face
            CvRect* r = (CvRect*)cvGetSeqElem( eyes, i );

            // Find the dimensions of the face,and scale it if necessary
            pt1.x = r->x*scale;
            pt2.x = (r->x+r->width)*scale;
            pt1.y = r->y*scale;
            pt2.y = (r->y+r->height)*scale;

            // Draw the rectangle in the input image
            cvRectangle( frame_copy, pt1, pt2, CV_RGB(0,0,0), CV_FILLED, 8, 0 );
        }
        
        // show the image
        cvShowImage("Output",frame_copy);
        
        // exit if key pressed
        if(cvWaitKey(10) > 0)
            break;
    }
    
    cvReleaseImage( &frame_copy );
    cvReleaseCapture( &camHandler );

    return 0;
}

g++ -o censor censor.cpp -O3 -Wall -lopencv_highgui -lopencv_ml -lopencv_objdetect