1. 本例中，我们需要导入：Emgu.CV.UI.dll、Emgu.CV.World.dll
2. 然后在程序中导入命名空间：using Emgu.CV; using System.Diagnostics;
3. 然后拖3个ImageBox到主窗体，拖3个TextBox和4个Button到主窗体，如图所示：
功能说明：点击button1添加图片并显示到ImageBox1中；点击button2将ImageBox1中的图片去色，并将灰度图显示到ImageBox2中；点击button3直接载入新的图片并去色，然后显示到ImageBox3中；点击button4清除所有的图片和文本框中的内容。
using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Diagnostics;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;using Emgu.CV;namespace WindowsFormsApplication8{public partial class Form1 : Form{Mat img1 = null;Mat img2 = null;Mat img3 = null;Stopwatch sw = new Stopwatch();public Form1(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){OpenFileDialog lvse = new OpenFileDialog();lvse.Title = "选择图片";lvse.InitialDirectory = "";lvse.Filter = "图片文件|*.bmp;*.jpg;*.jpeg;*.gif;*.png";lvse.FilterIndex = 1;if (lvse.ShowDialog() == DialogResult.OK){textBox1.Text = null;sw.Restart();img1 = CvInvoke.Imread(lvse.FileName, Emgu.CV.CvEnum.LoadImageType.AnyColor);imageBox1.Width = img1.Width / 2;imageBox1.Height = img1.Height / 2;imageBox1.Image = img1;sw.Stop();textBox1.Text = sw.ElapsedMilliseconds.ToString();}}private void button2_Click(object sender, EventArgs e){if (img1 != null){img2 = new Mat(img1.Rows, img1.Cols, Emgu.CV.CvEnum.DepthType.Cv8U, 1);textBox2.Text = null;sw.Reset();sw.Start();CvInvoke.CvtColor(img1, img2, Emgu.CV.CvEnum.ColorConversion.Bgr2Gray);imageBox2.Width = img2.Width / 2;imageBox2.Height = img2.Height / 2;imageBox2.Image = img2;sw.Stop();textBox2.Text = sw.ElapsedMilliseconds.ToString();}}private void button3_Click(object sender, EventArgs e){textBox3.Text = null;OpenFileDialog lvse = new OpenFileDialog();lvse.Title = "选择图片";lvse.InitialDirectory = "";lvse.Filter = "图片文件|*.bmp;*.jpg;*.jpeg;*.gif;*.png";lvse.FilterIndex = 1;if (lvse.ShowDialog() == DialogResult.OK){sw.Reset();sw.Start();img3 = CvInvoke.Imread(lvse.FileName, Emgu.CV.CvEnum.LoadImageType.Grayscale);imageBox3.Width = img3.Width / 2;imageBox3.Height = img3.Height / 2;imageBox3.Image = img3;sw.Stop();textBox3.Text = sw.ElapsedMilliseconds.ToString();}}private void button4_Click(object sender, EventArgs e){img1 = null;img2 = null;img3 = null;imageBox1.Image = null;imageBox2.Image = null;imageBox3.Image = null;textBox1.Text = null;textBox2.Text = null;textBox3.Text = null;}}}
运行结果如下：
其它：
创建图像并显示
Image<Bgr, byte> image = new Image<Bgr, byte>(320, 240, new Bgr(0, 0, 255));
//创建一张320*240尺寸颜色为红色的图像。
imageBox1.Image = image;//在ImageBox1控件中显示所创建好的图像。
加载当前环境目录下图片并显示：
// MessageBox.Show(Environment.CurrentDirectory.ToString());
Mat imgscr = CvInvoke.Imread(Environment.CurrentDirectory+"\\1.jpg");//读取图像
// CvInvoke.Imshow("img", imgscr);//显示图像
imageBox2.Image = imgscr;//在ImageBox2控件中显示所创建好的图像。
CvInvoke.WaitKey(0);//按键等待
