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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
