Opencv don't link

QT       += core
 
QT       -= gui
 
TARGET = test_web
CONFIG   += console
CONFIG   -= app_bundle
 
TEMPLATE = app
 
 
LIBS += -L/usr/lib/i386-linux-gnu/ -lopencv_core -lopencv_highgui -lopencv_imgproc
 
LIBS += -lzbar
 
SOURCES += main.cpp

  #include <opencv2/core.hpp>
#include <opencv2/videoio.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <zbar.h>
#include <iostream>
 
using namespace cv;
using namespace std;
using namespace zbar;
 
//g++ main.cpp /usr/local/include/ /usr/local/lib/ -lopencv_highgui.2.4.8 -lopencv_core.2.4.8
 
int main(int argc, char* argv[])
{
    VideoCapture cap(0); // open the video camera no. 0
 
   // cap.set(CV_CAP_PROP_FRAME_WIDTH,800);
   // cap.set(CV_CAP_PROP_FRAME_HEIGHT,640);
 
    if (!cap.isOpened())  // if not success, exit program
    {
        cout << "Cannot open the video cam" << endl;
        return -1;
    }
 
 
    ImageScanner scanner;  
      scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1);  
 
   double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH); //get the width of frames of the video
 
   double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT); //get the height of frames of the video
 
    cout << "Frame size : " << dWidth << " x " << dHeight << endl;
 
    namedWindow("MyVideo",CV_WINDOW_AUTOSIZE); //create a window called "MyVideo"
 
    while (1)
    {
        Mat frame;
 
        bool bSuccess = cap.read(frame); // read a new frame from video
 
         if (!bSuccess) //if not success, break loop
        {
             cout << "Cannot read a frame from video stream" << endl;
             break;
        }
 
        Mat grey;
        cvtColor(frame,grey,CV_BGR2GRAY);
 
        int width = frame.cols;  
        int height = frame.rows;  
        uchar *raw = (uchar *)grey.data;  
        // wrap image data  
        Image image(width, height, "Y800", raw, width * height);  
        // scan the image for barcodes  
        int n = scanner.scan(image);  
        // extract results  
        for(Image::SymbolIterator symbol = image.symbol_begin();  
        symbol != image.symbol_end();  
        ++symbol) {  
                vector<Point> vp;  
        // do something useful with results  
        cout << "decoded " << symbol->get_type_name()  << " symbol "" << symbol->get_data() << '"' <<" "<< endl;  
           int n = symbol->get_location_size();  
           for(int i=0;i<n;i++){  
                vp.push_back(Point(symbol->get_location_x(i),symbol->get_location_y(i))); 
           }  
           RotatedRect r = minAreaRect(vp);  
           Point2f pts[4];  
           r.points(pts);  
           for(int i=0;i<4;i++){  
                line(frame,pts[i],pts[(i+1)%4],Scalar(255,0,0),3);  
           }  
           //cout<<"Angle: "<<r.angle<<endl;  
        }  
 
        imshow("MyVideo", frame); //show the frame in "MyVideo" window
 
        if (waitKey(30) == 27) //wait for 'esc' key press for 30ms. If 'esc' key is pressed, break loop
       {
            cout << "esc key is pressed by user" << endl;
            break; 
       }
    }
    return 0;
}