创建LeadTools“对比图像”应用程序的具体步骤
1、打开Visual Studio .NET。点击 文件->新建->项目…。打开新建项目对话框后，在模板中选择“Visual C#”或“Visual Basic”，随后选择“Windows窗体应用程序”。在名称栏中输入项目名称“CompareImages”，并使用“浏览”按钮选择您工程的存储路径，点击“确定”。
2、在“解决方案资源管理器”中，右击“引用”，选择“添加引用”。根据当前工程的 Framework 版本和生成目标平台，选择添加相应的LeadTools控件，例如工程中的版本为 Framework 4.0、生成目标平台是 x86，则浏览选择Leadtools For .NET文件夹” <LEADTOOLS_INSTALLDIR>\Bin\DotNet4\Win32”,选择以下的DLL“：Leadtools.dllLeadtools.Codecs.dllLeadtools.Codecs.Tif.dllLeadtools.WinForms.dllLeadtools.ImageProcessing.Core.dll 点击“确定”按钮，将以上所有的DLL添加到应用程序中。
3、从工具箱（视图->工具箱），添加一个Button控件（将button1的Text属性修改为“在目标图像中搜索第一幅图像的字符L”，两个Panel控件（Name分别修改为panelBefore和panelAfter）。如下图：
4、切换至Form1的代码视图（右击Form1，选择查看代码），将下面几行代码添加到文件开始处：1: using Leadtools; 2: using Leadtools.Codecs; 3: using Leadtools.WinForms; 4: using Leadtools.ImageProcessing.Core; 5: using Leadtools.Codecs.Tif;
5、将以下变量添加至Form1类： 1: private RasterImageViewer beforePic; 2: private RasterImageViewer afterPic; 3: private RasterCodecs codecs;
6、添加Form1 Load事件句柄，在其中添加以下代码： 1: beforePic = new RasterImageViewer(); 2: beforePic.BackColor = Color.DarkCyan; 3: beforePic.Dock = DockStyle.Fill; 4: beforePic.HorizontalAlignMode = RasterPaintAlignMode.Center; 5: beforePic.VerticalAlignMode = RasterPaintAlignMode.Center; 6: beforePic.AutoResetScaleFactor = false; 7: beforePic.InteractiveMode = RasterViewerInteractiveMode.Region; 8: beforePic.InteractiveRegionType = RasterViewerInteractiveRegionType.Rectangle; 9: panelBefore.Controls.Add(beforePic);10: beforePic.BringToFront();11:12: afterPic = new RasterImageViewer();13: afterPic.BackColor = beforePic.BackColor;14: afterPic.Dock = beforePic.Dock;15: afterPic.HorizontalAlignMode = beforePic.HorizontalAlignMode;16: afterPic.VerticalAlignMode = beforePic.VerticalAlignMode;17: afterPic.AutoResetScaleFactor = beforePic.AutoResetScaleFactor;18: panelAfter.Controls.Add(afterPic);19: afterPic.BringToFront();20:21: codecs = new RasterCodecs();22: codecs.ThrowExceptionsOnInvalidImages = true;23: //加载图像24: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @"..\..\Pic\L.tif"));25: afterPic.Image = codecs.Load(Path.Combine(Application.StartupPath, @"..\..\Pic\All.tif"));
7、双击button1，在button1 Click事件句柄中添加以下代码：1: LeadRe罕铞泱殳ct rc_cor = new LeadRect(5, 5, 35, 35); 2: 3: CorrelationCommand cmd = new CorrelationCommand(); 4: cmd.CorrelationImage = beforePic.Image; 5: cmd.CorrelationImage.AddRectangleToRegion(null, rc_cor, RasterRegionCombineMode.Set); 6: cmd.Points = new LeadPoint[90]; 7: cmd.Threshold = 90; 8: cmd.XStep = 2; 9: cmd.YStep = 1;10: cmd.Run(afterPic.Image);11:12: for (int i_cor = 0; i_cor < cmd.NumberOfPoints; i_cor++)13: {14: rc_cor = new LeadRect(cmd.Points[i_cor].X, cmd.Points[i_cor].Y, 35, 35);15: if (i_cor == 0)16: afterPic.Image.AddRectangleToRegion(null, rc_cor, RasterRegionCombineMode.Set);17: else18: afterPic.Image.AddRectangleToRegion(null, rc_cor, RasterRegionCombineMode.Or);19: }
8、编译运行程序，结果如下图，从下图我们看到CorrelationCommand在目标图像中轻松找到了所有字符L！
