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C# EmguCV影象處理例項

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1.本例中,我們需要匯入:Emgu.CV.UI.dll、Emgu.CV.World.dll

2.然後在程式中匯入名稱空間:using Emgu.CV;using System.Diagnostics;

3.然後拖3個ImageBox到主窗體,拖3個TextBox和4個Button到主窗體,如圖所示:

功能說明:點選button1新增圖片並顯示到ImageBox1中;點選button2將ImageBox1中的圖片去色,並將灰度圖顯示到ImageBox2中;點選button3直接載入新的圖片並去色,然後顯示到ImageBox3中;點選button4清除所有的圖片和文字框中的內容。

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 = "選擇圖片";
            lvse.InitialDirectory = "";
            lvse.Filter = "圖片檔案|*.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 = "選擇圖片";
            lvse.InitialDirectory = "";
            lvse.Filter = "圖片檔案|*.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;
        }
    }
}

  執行結果如下:

其它:

建立影象並顯示

Image<Bgr, byte> image = new Image<Bgr, byte>(320, 240, new Bgr(0, 0, 255));

//建立一張320*240尺寸顏色為紅色的影象。

imageBox1.Image = image;//在ImageBox1控制元件中顯示所建立好的影象。

載入當前環境目錄下圖片並顯示:

// MessageBox.Show(Environment.CurrentDirectory.ToString());

Mat imgscr = CvInvoke.Imread(Environment.CurrentDirectory+"\\1.jpg");//讀取影象

// CvInvoke.Imshow("img", imgscr);//顯示影象

imageBox2.Image = imgscr;//在ImageBox2控制元件中顯示所建立好的影象。

CvInvoke.WaitKey(0);//按鍵等待