Emgu.CV(三)

像素交换

private void btn_Exchange_Click(object sender, EventArgs e)

        {

            if (imageBox1.Image != null)

            {

                var image = (Image<Bgr, Byte>)imageBox1.Image;

                ExChangePixelValue(image);

                imageBox1.Image = image;

            }

        }

 public  void ExChangePixelValue(Image<Bgr, Byte> image)

        {

//这两个值视图片大小而定

            for (int i = 0; i < 500; i++)

            {

                for (int j = 0; j < 1000; j++)

                {

                    Bgr tmp = image[i, j];

                    image[i, j] = image[i + 500, j + 500];

                    image[i + 500, j + 500] = tmp;

                }

            }

        }

　　

图片自加

private void btn_Add_Click(object sender, EventArgs e)

        {

            var image= new Image<Bgr, byte>(@"D:\1.jpg");

            //图片自加

            imageBox2.Image = image.Add(image);

        }

　　

图片自减

private void btn_Sub_Click(object sender, EventArgs e)

        {

            var image = new Image<Bgr, byte>(_img);

            //图片自减

            var rect = new Rectangle(new Point(0, 0), new Size(image.Width / 2, image.Height));

            using (var mask = new Image<Gray, Byte>(image.Size))

            {

                mask.SetZero();//设置所有值为0

                mask.ROI = rect;

                mask.SetValue(255);//设置ROI的值为255

                mask.ROI = Rectangle.Empty;//去掉ROI

                                           //res(I)=img1(I)-img2(I) if mask(I)!=0

                var resImage = image.Sub(image, mask);

                mask._Not();//反转mask的值（255->0, 0->255）

                image.Copy(resImage, mask);//在mask(I)!= 0的条件下，把image1的值拷贝到resImage中

                imageBox2.Image = resImage;

            }

        }