图像的缩放，旋转，转置和镜像

        static void Main(String[] args)
        {
            Mat img = CvInvoke.Imread(@"C:\Users\dell\Pictures\mach.jpg");
            Mat resize = new Mat();
            //图像缩放操作
            CvInvoke.Resize(img, resize, new Size(300, 300));
            //图像旋转操作
            PointF center = new PointF(resize.Cols / 2, resize.Rows / 2);
            double angle = 30;
            double scale = 2;
            Mat rotate = new Mat();
            CvInvoke.GetRotationMatrix2D(center, angle, scale,rotate);
            Mat rotatedImg = new Mat();
            CvInvoke.WarpAffine(resize, rotatedImg, rotate, new Size(300, 300));
            //转置和镜像
            Mat transpose = new Mat();
            Mat flip = new Mat();
            CvInvoke.Flip(resize, flip, FlipType.Horizontal);
            CvInvoke.Transpose(resize, transpose);

            CvInvoke.Imshow("flip", flip);
            CvInvoke.Imshow("rotated", rotatedImg);
            CvInvoke.Imshow("src", img);
            CvInvoke.Imshow("resized300*300", resize);
            CvInvoke.Imshow("transpose", transpose);
            CvInvoke.WaitKey(0);
        }