C# EmguCV图像处理实例

Posted 2021-07-04 dotNET编程大全

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