OpenCvSharp で動的背景差分検出（From Web Camera）

DynamicBackgroundSubtractorCapture.cs

using OpenCvSharp.CPlusPlus;
using System;

namespace OpenCvSharpSample
{
    class Program
    {
        static void Main(string[] args)
        {
            DynamicBackgroundSubtractorCapture(0);
        }

        public static void DynamicBackgroundSubtractorCapture(int cameraId)
        {
            using (var capture = new VideoCapture(cameraId))
            using (var captureWindow = new Window("Capture #" + cameraId))
            using (var resultGMGWindow = new Window("Capture #GMG #" + cameraId))
            using (var resultMoGWindow = new Window("Capture #MoG #" + cameraId))
            using (var resultMoG2Window = new Window("Capture #MoG2 #" + cameraId))
            using (var subtractorGMG = new BackgroundSubtractorGMG())
            using (var subtractorMoG = new BackgroundSubtractorMOG())
            using (var subtractorMoG2 = new BackgroundSubtractorMOG2())
            {

                if (!capture.IsOpened())
                {
                    throw new InvalidOperationException("カメラが開けませんでした。");
                }

                var mat = new Mat();
                var outputMat = new Mat();

                capture.FrameHeight = 640;
                capture.FrameWidth = 480;

                while (Cv2.WaitKey(1) < 0)
                {
                    capture.Read(mat);

                    captureWindow.ShowImage(mat);

                    subtractorGMG.Run(mat, outputMat);
//                    Cv2.BitwiseAnd(mat,outputMat.CvtColor(ColorConversion.GrayToBgr),outputMat);
                    resultGMGWindow.ShowImage(outputMat);

                    subtractorMoG.Run(mat, outputMat);
//                    Cv2.BitwiseAnd(mat, outputMat.CvtColor(ColorConversion.GrayToBgr), outputMat);
                    resultMoGWindow.ShowImage(outputMat);

                    subtractorMoG2.Run(mat, outputMat);
//                    Cv2.BitwiseAnd(mat, outputMat.CvtColor(ColorConversion.GrayToBgr), outputMat);
                    resultMoG2Window.ShowImage(outputMat);
                }
            }
        }
    }
}