zed_oc_rectify_example.cpp File Reference

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Functions
int	main (int argc, char *argv[])

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Examples

zed_oc_rectify_example.cpp.

Definition at line 37 of file zed_oc_rectify_example.cpp.

{
    // ----> Silence unused warning
    (void)argc;
    (void)argv;
    // <---- Silence unused warning
 
    sl_oc::VERBOSITY verbose = sl_oc::VERBOSITY::INFO;
 
    // ----> Set Video parameters
    sl_oc::video::VideoParams params;
    params.res = sl_oc::video::RESOLUTION::HD2K;
    params.fps = sl_oc::video::FPS::FPS_15;
    params.verbose = verbose;
    // <---- Set Video parameters
 
    // ----> Create Video Capture
    sl_oc::video::VideoCapture cap(params);
    if( !cap.initializeVideo(-1) )
    {
        std::cerr << "Cannot open camera video capture" << std::endl;
        std::cerr << "See verbosity level for more details." << std::endl;
 
        return EXIT_FAILURE;
    }
    int sn = cap.getSerialNumber();
    std::cout << "Connected to camera sn: " << sn << std::endl;
    // <---- Create Video Capture
 
    // ----> Retrieve calibration file from Stereolabs server
    std::string calibration_file;
    // ZED Calibration
    unsigned int serial_number = sn;
    // Download camera calibration file
    if( !sl_oc::tools::downloadCalibrationFile(serial_number, calibration_file) )
    {
        std::cerr << "Could not load calibration file from Stereolabs servers" << std::endl;
        return EXIT_FAILURE;
    }
    std::cout << "Calibration file found. Loading..." << std::endl;
 
    // ----> Frame size
    int w,h;
    cap.getFrameSize(w,h);
    // <---- Frame size
 
    // ----> Initialize calibration
    cv::Mat map_left_x, map_left_y;
    cv::Mat map_right_x, map_right_y;
    cv::Mat cameraMatrix_left, cameraMatrix_right;
    sl_oc::tools::initCalibration(calibration_file, cv::Size(w/2,h), map_left_x, map_left_y, map_right_x, map_right_y,
                    cameraMatrix_left, cameraMatrix_right);
 
    std::cout << " Camera Matrix L: \n" << cameraMatrix_left << std::endl << std::endl;
    std::cout << " Camera Matrix R: \n" << cameraMatrix_right << std::endl << std::endl;
    // ----> Initialize calibration
 
    cv::Mat frameBGR, left_raw, left_rect, right_raw, right_rect;
 
    uint64_t last_ts=0;
 
    // Infinite video grabbing loop
    while (1)
    {
        // Get a new frame from camera
        const sl_oc::video::Frame frame = cap.getLastFrame();
 
        // ----> If the frame is valid we can convert, rectify and display it
        if(frame.data!=nullptr && frame.timestamp!=last_ts)
        {
            last_ts = frame.timestamp;
 
            // ----> Conversion from YUV 4:2:2 to BGR for visualization
            cv::Mat frameYUV = cv::Mat( frame.height, frame.width, CV_8UC2, frame.data );
            cv::cvtColor(frameYUV,frameBGR,cv::COLOR_YUV2BGR_YUYV);
            // <---- Conversion from YUV 4:2:2 to BGR for visualization
 
            // ----> Extract left and right images from side-by-side
            left_raw = frameBGR(cv::Rect(0, 0, frameBGR.cols / 2, frameBGR.rows));
            right_raw = frameBGR(cv::Rect(frameBGR.cols / 2, 0, frameBGR.cols / 2, frameBGR.rows));
            // Display images
            sl_oc::tools::showImage("left RAW", left_raw, params.res);
            sl_oc::tools::showImage("right RAW", right_raw, params.res);
            // <---- Extract left and right images from side-by-side
 
            // ----> Apply rectification
            cv::remap(left_raw, left_rect, map_left_x, map_left_y, cv::INTER_LINEAR );
            cv::remap(right_raw, right_rect, map_right_x, map_right_y, cv::INTER_LINEAR );
 
            sl_oc::tools::showImage("right RECT", right_rect, params.res);
            sl_oc::tools::showImage("left RECT", left_rect, params.res);
            // <---- Apply rectification
        }
 
        // ----> Keyboard handling
        int key = cv::waitKey( 5 );
        if(key=='q' || key=='Q') // Quit
            break;
        // <---- Keyboard handling
    }
 
    return EXIT_SUCCESS;
}

References sl_oc::video::Frame::data, sl_oc::tools::downloadCalibrationFile(), sl_oc::video::VideoParams::fps, sl_oc::video::FPS_15, frameBGR, frameYUV, sl_oc::video::VideoCapture::getFrameSize(), sl_oc::video::VideoCapture::getLastFrame(), sl_oc::video::VideoCapture::getSerialNumber(), sl_oc::video::HD2K, sl_oc::video::Frame::height, sl_oc::INFO, sl_oc::tools::initCalibration(), sl_oc::video::VideoCapture::initializeVideo(), left_raw, left_rect, params, sl_oc::video::VideoParams::res, right_raw, right_rect, sl_oc::tools::showImage(), sl_oc::video::Frame::timestamp, sl_oc::video::VideoParams::verbose, and sl_oc::video::Frame::width.