【C#】OpenCvSharpでWebカメラの映像をキャプチャする方法

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
//以下、OpenCvsharpの使用とMatの変換用として追加
using OpenCvSharp;
using OpenCvSharp.Extensions;

namespace ImageProcessing
{
    public partial class Form1 : Form
    {

        private Mat _flame;

        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //PictureBoxのサイズに合わせて表示
            pictureBox1.SizeMode = PictureBoxSizeMode.Zoom;
            pictureBox2.SizeMode = PictureBoxSizeMode.Zoom;
        }


        private void button1_Click(object sender, EventArgs e)
        {
            //VideoCapture作成
            using (var capture = new VideoCapture())
            {
                //カメラの起動　
                capture.Open(0);

                if (!capture.IsOpened())
                {
                    throw new Exception("capture initialization failed");
                }

                //画像取得用のMatを作成
                _flame = new Mat();

                while (true)
                {
                    try
                    {
                        capture.Read(_flame);
                        if (_flame.Empty())
                        {
                            break;
                        }

                        if (_flame.Size().Width > 0)
                        {
                            //PictureBoxに表示　MatをBitMapに変換
                            pictureBox1.Image = BitmapConverter.ToBitmap(_flame);
                        }

                        int key = Cv2.WaitKey();

                        if (this.IsDisposed)
                        {
                            break;
                        }
                    }

                    catch (Exception)
                    {
                        break;
                    }
                }

            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            if (_flame == null)
            {
                return;
            }
            //PictureBoxに表示　MatをBitMapに変換
            pictureBox2.Image = BitmapConverter.ToBitmap(_flame);
        }
    }
}