图像文字识别(Interop.MODI)

【实例截图】

【核心代码】

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Windows;
using System.Drawing.Imaging;
using System.Threading;

namespace DevOCR
{
    public partial class Form1 : Form
    {

		// Declare the two dialog objects
		//   we'll be using.
        //声明的两个对话框对象
        //我们将使用。
		MyWin m_WindowDlg;
		ShowBitmap m_ShowBitmapDlg;

        public Form1()
        {
            InitializeComponent();
		}
		private void btnCapture_Click(object sender, EventArgs e)
		{
            // Get the screen width and height.获取屏幕的宽度和高度。
			int w = Screen.PrimaryScreen.Bounds.Width;
			int h = Screen.PrimaryScreen.Bounds.Height;
            // Create the dialog object on which we'll创建对话框对象上，我们将
            //   display the screen bitmap.在屏幕显示位图。
			m_WindowDlg = new MyWin();
            // Set to wait cursor so user knows something设置为等待光标，使用户知道的东西
            //   is going on.是怎么回事。
			Cursor = Cursors.WaitCursor;
            // Hide the main app window so that it isn't in the隐藏在主应用程序窗口，以便它不是在
            //   capture image (and wait since Vista takes its time).捕获图像（等待由于Vista需要的时间）。
			Hide();
			Thread.Sleep(200);
            // Create the bitmap into which the screen will be copied.创建到该屏幕将被复制位图。
			m_WindowDlg.m_objBitmap = new Bitmap(w, h,
				PixelFormat.Format32bppArgb);
            // Get the graphics context for the bitmap.获取为位图图形上下文。
			Graphics g = Graphics.FromImage(m_WindowDlg.m_objBitmap);
            // Copy the screen into the bitmap object.位图复制到对象的屏幕。
			g.CopyFromScreen(0, 0, 0, 0, new Size(w, h));
            // Show the main application window. We need显示主应用程序窗口。我们需要
            //   to do this because the child window won't这样做，因为子窗口不会
            //   behave properly if it's hidden or minimized.循规蹈矩，如果是隐藏或最小化。
			Show();
            // Create a delegate so that the EndCapture创建一个代表，让EndCapture
            //   method can be called.方法可以调用。
			m_WindowDlg.m_EndCaptureMethod = 
				new MyWin.EndCaptureMethod(EndCapture);
            // Show the captured screen.查看捕获的屏幕。
			m_WindowDlg.Show();
            // Hide the main application window.隐藏主应用程序窗口。
			Hide();
            // Set the location, size, and cursor of the设置的位置，大小，以及游标
            //   dialog in which the user will select对话框中，用户将选择
            //   a portion.的一部分。
			m_WindowDlg.Location = new Point(0, 0);
			m_WindowDlg.Size = new Size(w, h);
			m_WindowDlg.Cursor = Cursors.Cross;
		}
        // This method is called once the user is这种方法被称为一旦用户
        //   finished selecting the screen region完成选择屏幕区域
        //   that will be OCRed.将文本识别过。
		public void EndCapture(int x, int y, int w, int h)
		{
            // Restore cursor恢复光标
			Cursor = Cursors.Default;
            // Created the dialog in which we'll创建对话框中，我们将
            //   show the capture bitmap.显示位图的捕获。
			m_ShowBitmapDlg = new ShowBitmap();
            // Copy the bitmap from the selection bitmap复制从选择位图位图
            //   that was displayed to the display bitmap.这是显示在显示位图。
			m_ShowBitmapDlg.m_objBitmap =
				new Bitmap(w, h, PixelFormat.Format32bppArgb);
            // Get the graphics context for the bitmap.获取为位图图形上下文
			Graphics g = 
				Graphics.FromImage(m_ShowBitmapDlg.m_objBitmap);
            // Copy the selected portion into the newly-created选定部分复制到新创建的
			//   bitmap.位图
			g.DrawImage(m_WindowDlg.m_objBitmap,
				new Rectangle(0, 0, w, h), x, y,
				w, h, GraphicsUnit.Pixel);
            // Hide the dialog that was used to display the 隐藏了用来显示对话框 
            //   entire screen.整个屏幕。
			m_WindowDlg.Hide();
            // Add to the width and height the frame margins.增加宽度和高度的框架边缘
			w  = (m_ShowBitmapDlg.Bounds.Width -
				m_ShowBitmapDlg.ClientRectangle.Width);
			h  = (m_ShowBitmapDlg.Bounds.Height -
				m_ShowBitmapDlg.ClientRectangle.Height);
            // Set the maximum size for the window in which设置的窗口，其中最大尺寸
            //   we'll display the bitmap.我们将会显示位图。
			m_ShowBitmapDlg.MaximumSize = 
				m_ShowBitmapDlg.Size = new Size(w, h);
            // Show the bitmap in the dialog.查看对话框中的位图。
			m_ShowBitmapDlg.ShowDialog();
            // Now re-show the main application window.现在重新出现在主应用程序窗口。
			Show();
		}
    }
}