图像处理开发工具：LeadTools
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“RemoveNoise”，并使用“浏览”按钮选择您工程的存储路径，点击“确定”。
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”
从工具箱（视图->工具箱），添加7个RadioButton控件（将RadioButton的Text属性依照下表修改），两个Panel控件（Name分别修改为panelBefore和panelAfter）。如下图：
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.Codecs.Tif; 4: using Leadtools.ImageProcessing; 5: using Leadtools.ImageProcessing.Core; 6: using Leadtools.ImageProcessing.Effects; 7: using Leadtools.ImageProcessing.Color; 8: using Leadtools.WinForms;
将以下变量添加至Form1类： 1: private RasterImageViewer beforePic; 2: private RasterImageViewer afterPic; 3: private RasterCodecs codecs; 4: private RasterImage temp;
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.InteractiveMode = RasterViewerInteractiveMode.Pan; 5: beforePic.HorizontalAlignMode = RasterPaintAlignMode.Center; 6: beforePic.VerticalAlignMode = RasterPaintAlignMode.Center; 7: beforePic.AutoResetScaleFactor = false; 8: panelBefore.Controls.Add(beforePic); 9: beforePic.BringToFront(); 10: 11: afterPic = new RasterImageViewer(); 12: afterPic.BackColor = beforePic.BackColor; 13: afterPic.Dock = beforePic.Dock; 14: afterPic.InteractiveMode = beforePic.InteractiveMode; 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;
双击radioButton1，在radioButton1 CheckedChanged事件句柄中添加以下代码：（本段代码为DespeckleCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\clean.tif')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: DespeckleCommand command = new DespeckleCommand(); 6: 7: command.Run(temp); 8: afterPic.Image = temp;
双击radioButton2，在radioButton2 CheckedChanged事件句柄中添加以下代码：（本段代码为MedianCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\Master.jpg')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: MedianCommand command = new MedianCommand(); 6: 7: command.Dimension = 9; 8: command.Run(temp); 9: afterPic.Image = temp;
双击radioButton3，在radioButton3 CheckedChanged事件句柄中添加以下代码：（本段代码为AverageCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\Master.jpg')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: AverageCommand command = new AverageCommand(); 6: 7: command.Dimension = 3; 8: command.Run(temp); 9: afterPic.Image = temp; 10: codecs.Save(temp, Path.Combine(Application.StartupPath, @'..\..\Pic\AverageCommandResult.jpg'), RasterImageFormat.Jpeg, 24);
双击radioButton4，在radioButton4 CheckedChanged事件句柄中添加以下代码：（本段代码为AutoBinaryCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\Master.jpg')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: AutoBinaryCommand command = new AutoBinaryCommand(); 6: 7: command.Run(temp); 8: afterPic.Image = temp; 9: codecs.Save(temp, Path.Combine(Application.StartupPath, @'..\..\Pic\AutoBinaryCommand.jpg'), RasterImageFormat.Jpeg, 24);
双击radioButton5，在radioButton5 CheckedChanged事件句柄中添加以下代码：（本段代码为SmoothEdgesCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\Master.jpg')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: SmoothEdgesCommand command = new SmoothEdgesCommand(); 6: command.Amount = 50; 7: command.Threshold = 0; 8: 9: command.Run(temp); 10: afterPic.Image = temp;
双击radioButton6，在radioButton6 CheckedChanged事件句柄中添加以下代码：（本段代码为DiscreteFourierTransformCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\Master.jpg')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: FourierTransformInformation FTArray = new FourierTransformInformation(temp); 6: LeadRect rcRange = new LeadRect(0, 0, temp.Width - 1, temp.Height - 1); 7: DiscreteFourierTransformCommand command = new DiscreteFourierTransformCommand(); 8: 9: command.FourierTransformInformation = FTArray; 10: command.Range = rcRange; 11: command.Flags = DiscreteFourierTransformCommandFlags.DiscreteFourierTransform | 12: DiscreteFourierTransformCommandFlags.Gray | 13: DiscreteFourierTransformCommandFlags.Range | 14: DiscreteFourierTransformCommandFlags.InsideX | 15: DiscreteFourierTransformCommandFlags.InsideY; 16: 17: 18: FourierTransformDisplayCommand disCommand = new FourierTransformDisplayCommand(); 19: disCommand.Flags = FourierTransformDisplayCommandFlags.Log | FourierTransformDisplayCommandFlags.Magnitude; 20: disCommand.FourierTransformInformation = command.FourierTransformInformation; 21: 22: disCommand.Run(temp); 23: 24: afterPic.Image = temp;
双击radioButton7，在radioButton7 CheckedChanged事件句柄中添加以下代码：（本段代码为FastFourierTransformCommand类的使用） 1: beforePic.Image = codecs.Load(Path.Combine(Application.StartupPath, @'..\..\Pic\Master.jpg')); 2: 3: temp = beforePic.Image.Clone(); 4: 5: SizeCommand sizecommand = new SizeCommand(256, 256, Leadtools.RasterSizeFlags.Bicubic); 6: 7: sizecommand.Run(temp); 8: FourierTransformInformation FTArray = new FourierTransformInformation(temp); 9: 10: FastFourierTransformCommand command = new FastFourierTransformCommand(FTArray, FastFourierTransformCommandFlags.FastFourierTransform | FastFourierTransformCommandFlags.Gray); 11: command.Run(temp); 12: LeadRect rcRect = new LeadRect(0, 0, temp.Width / 2, temp.Height / 2); 13: FrequencyFilterCommand FreqCommand = new FrequencyFilterCommand(FTArray, rcRect, FrequencyFilterCommandFlags.InsideX | FrequencyFilterCommandFlags.OutsideY); 14: 15: FastFourierTransformCommand InvCommand = new FastFourierTransformCommand(FTArray, FastFourierTransformCommandFlags.InverseFastFourierTransform | FastFourierTransformCommandFlags.Gray | FastFourierTransformCommandFlags.Scale | FastFourierTransformCommandFlags.Both); 16: InvCommand.Run(temp); 17: 18: afterPic.Image = temp;
编译运行程序。本文DEMO使用了DespeckleCommand、MedianCommand、AverageCommand、AutoBinaryCommand、SmoothEdgesCommand类对图像进行去噪处理，使用了离散傅里叶变换和快速傅里叶变换对图像进行了处理。结果如下图：