Barcode Detection

C++: Barcode Detection

Barcodes can be used in a wide range of robotics and software applications. That’s why we integrated a barcode reader into Daisykit. The core algorithms of the barcode reader are from the Zxing-CPP project (opens in a new tab). This barcode processor can read QR codes and bar codes in different formats.

Source code: src/examples/demo_barcode_scanner.cpp.

#include "daisykit/flows/barcode_scanner_flow.h"
#include "third_party/json.hpp"
#include <stdio.h>
#include <fstream>
#include <iostream>
#include <opencv2/opencv.hpp>
#include <streambuf>
#include <string>
using namespace cv;
using namespace std;
using json = nlohmann::json;
using namespace daisykit::flows;
int main(int, char**) {
  std::ifstream t("configs/barcode_scanner_config.json");
  std::string config_str((std::istreambuf_iterator<char>(t)),
  BarcodeScannerFlow flow(config_str);
  Mat frame;
  VideoCapture cap(0);
  while (1) {
    cap >> frame;
    cv::Mat rgb;
    cv::cvtColor(frame, rgb, cv::COLOR_BGR2RGB);
    std::string result = flow.Process(rgb, true);
    if (!result.empty()) {
      std::cout << "New Scan Finished" << std::endl;
      std::cout << result << std::endl;
    cv::Mat draw;
    cv::cvtColor(rgb, draw, cv::COLOR_RGB2BGR);
    imshow("Image", draw);
  return 0;

Update the configurations by modifying config files in assets/configs.