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