WebcamCodeScanner/main.cpp at a2475c01f54bbf7bed33e16cd335e39a95d835c9 · ayoungprogrammer/WebcamCodeScanner · GitHub

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#include <iostream>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <zbar.h>

using namespace cv;
using namespace std;
using namespace zbar;

int main (int argc, char *argv[])
{
  VideoCapture cap(0); // open video capture device #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 << "Unable to open video capture device." << endl;
    return EXIT_FAILURE;
  }

  ImageScanner scanner;
  scanner.set_config(ZBAR_NONE, ZBAR_CFG_ENABLE, 1);

  double dWidth = cap.get(CV_CAP_PROP_FRAME_WIDTH); // get video frame width
  double dHeight = cap.get(CV_CAP_PROP_FRAME_HEIGHT); // get video frame height

  cout << "Frame size: " << dWidth << " x " << dHeight << endl;

  namedWindow("Video", CV_WINDOW_AUTOSIZE); // create window

  while (1)
  {
    Mat frame;

    if (!cap.read(frame)) // read frame from video or break loop
    {
      cout << "Unable to read 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("Video", frame); // show the frame in "Video" 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 EXIT_SUCCESS;
}