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;                
            }
        }