メモリリークしない

CanAllocateMemoryMethods.cs

// using OpenCvSharp;
// using OpenCvSharp.CPlusPlus;

// リソースを自分の管理下において明示的に開放すればメモリリークしない
public static void CanAllocateMemoryMethod(int cameraId)
{
    using (var capture = new VideoCapture(cameraId))
    {
        var srcMat = new Mat();

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

            var grayMat = srcMat.CvtColor(ColorConversion.BgrToGray);
            var binaryMat = grayMat.Threshold(100, 255, ThresholdType.Binary);
            var dstMat = binaryMat.CvtColor(ColorConversion.GrayToBgr);

            Cv2.ImShow("src", srcMat);
            Cv2.ImShow("dst", dstMat);

            grayMat.Dispose();
            binaryMat.Dispose();
            dstMat.Dispose();
        }
    }
}

// OpenCV2 C++ API ライクに書いてもメモリリークしない
public static void CanAllocateMemoryMethod2(int cameraId)
{
    using (var capture = new VideoCapture(cameraId))
    {
        var srcMat = new Mat();
        var dstMat = new Mat();

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

            Cv2.CvtColor(srcMat, dstMat, ColorConversion.BgrToGray);
            Cv2.Threshold(dstMat, dstMat, 100, 255, ThresholdType.Binary);
            Cv2.CvtColor(dstMat, dstMat, ColorConversion.GrayToBgr);

            Cv2.ImShow("src", srcMat);
            Cv2.ImShow("dst", dstMat);
        }
    }
}