main.cpp

int main() {
    cv::VideoCapture cam(0);

    if (!cam.isOpened()) {
        throw std::runtime_error("Error");
    }

    cv::namedWindow("Window");
    
    while(true){
        cv::Mat frame;
        cam>>frame;
        cv::resize(frame, frame,cv::Size(350,350));
        cv::cvtColor(frame, output, CV_BGR2GRAY);

        cv::imshow("bgr_frame", frame);
        cv::imshow("gray_frame", output);

        cv::Mat output_rotate (output.rows, output.cols, CV_8UC1);
        ImageOperator::rotate(output.data,output.cols,output.rows,output.channels(),output_rotate.data);
        cv::imshow("rotate 90deg", output_rotate);

        ImageOperator::rotate(output_rotate.data,output.cols,output.rows,output.channels(),output_rotate.data);
        cv::imshow("rotate 180deg", output_rotate);

        if(cv::waitKey(30) >= 0) break;
    }
    return 0;
}