LeadTools创建“加速图像分辨率转换 ”程序步骤

2024-10-14 09:59:28

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“SampleRasterUserMatchTable”，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.Bmp.dllLeadtools.Codecs.Cmp.dllLeadtools.ImageProcessing.Core.dllLeadtools.WinForms.dll

3、从工具箱（视图->工具箱），添加2个Button控件（将Button的Text属性分别改为“加载图像”和“使用RasterUserMatchTable在改变图像分辨率时加快转换速度”）。

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.ImageProcessing; 4: using Leadtools.ImageProcessing.Core; 5: using Leadtools.WinForms;

5、将以下变量添加至Form1类： 1: private RasterImage image; 2: private RasterImageViewer imageViewer; 3: private RasterCodecs codecs;

6、双击button1，在button1 Click事件句柄中添加以下代码： 1: // 加载兔脒巛钒图像 2: codecs = new RasterCodecs(); 3: 4: codecs.ThrowExceptionsOnInvalidImages = true; 5: image = codecs.Load(Path.Combine(Application.StartupPath, @"..\..\Pic\IMAGE25pxp")); 6: 7: imageViewer = new RasterImageViewer(); 8: imageViewer.Image = image; 9: imageViewer.Height = 1200;10: imageViewer.Width = 1000;11: imageViewer.Location = new System.Drawing.Point(0, 50);12: Controls.Add(imageViewer);13: imageViewer.BringToFront();

7、双击button2，在button2 Click事件句柄中添加以下代码： 1: if (image == null) 2: 撑俯擂摔{ 3: MessageBox.Show("请首先加载图像！"); 4: return; 5: } 6: RasterImage destImage = image.Clone(); 7: // 64色彩虹调色板 8: RasterColor[] colors = 9: {10: new RasterColor(0, 0, 0), new RasterColor(0, 0, 85), new RasterColor(0, 0, 170), new RasterColor(0, 0, 255),11: new RasterColor(85, 0, 0), new RasterColor(85, 0, 85), new RasterColor(85, 0, 170), new RasterColor(85, 0, 255),12: new RasterColor(170, 0, 0), new RasterColor(170, 0, 85), new RasterColor(170, 0, 170), new RasterColor(170, 0, 255),13: new RasterColor(255, 0, 0), new RasterColor(255, 0, 85), new RasterColor(255, 0, 170), new RasterColor(255, 0, 255),14: new RasterColor(0, 85, 0), new RasterColor(0, 85, 85), new RasterColor(0, 85, 170), new RasterColor(0, 85, 255),15: new RasterColor(85, 85, 0), new RasterColor(85, 85, 85), new RasterColor(85, 85, 170), new RasterColor(85, 85, 255),16: new RasterColor(170, 85, 0), new RasterColor(170, 85, 85), new RasterColor(170, 85, 170), new RasterColor(170, 85, 255),17: new RasterColor(255, 85, 0), new RasterColor(255, 85, 85), new RasterColor(255, 85, 170), new RasterColor(255, 85, 255),18: new RasterColor(0, 170, 0), new RasterColor(0, 170, 85), new RasterColor(0, 170, 170), new RasterColor(0, 170, 255),19: new RasterColor(85, 170, 0), new RasterColor(85, 170, 85), new RasterColor(85, 170, 170), new RasterColor(85, 170, 255),20: new RasterColor(170, 170, 0), new RasterColor(170, 170, 85), new RasterColor(170, 170, 170), new RasterColor(170, 170, 255),21: new RasterColor(255, 170, 0), new RasterColor(255, 170, 85), new RasterColor(255, 170, 170), new RasterColor(255, 170, 255),22: new RasterColor(0, 255, 0), new RasterColor(0, 255, 85), new RasterColor(0, 255, 170), new RasterColor(0, 255, 255),23: new RasterColor(85, 255, 0), new RasterColor(85, 255, 85), new RasterColor(85, 255, 170), new RasterColor(85, 255, 255),24: new RasterColor(170, 255, 0), new RasterColor(170, 255, 85), new RasterColor(170, 255, 170), new RasterColor(170, 255, 255),25: new RasterColor(255, 255, 0), new RasterColor(255, 255, 85), new RasterColor(255, 255, 170), new RasterColor(255, 255, 255)26: };27:28: // 创建和设置user match table29: RasterUserMatchTable userMatchTable = new RasterUserMatchTable();30: userMatchTable.Create(colors);31: userMatchTable.Use();32:33: // 使用新调色板更改颜色分辨率。注意若您多次使用，user match table 使您的代码速度更快。它的34: //代码在这里出现是因为我们想要向您展示它是怎么使用的。35:36: ColorResolutionCommand command = new ColorResolutionCommand(37: ColorResolutionCommandMode.InPlace,38: 8,39: RasterByteOrder.Rgb,40: RasterDitheringMethod.FloydStein,41: ColorResolutionCommandPaletteFlags.UsePalette | ColorResolutionCommandPaletteFlags.FastMatch,42: colors);43: command.Run(destImage);44:45: //若您不再需要使用user match table，释放它46: userMatchTable.Unuse();47:48: imageViewer.Image = destImage;49: // 将图像保存回磁盘50: codecs.Save(destImage, Path.Combine(Application.StartupPath, @"..\..\Pic\result.bmp"), RasterImageFormat.Bmp, 8);

8、编译运行程序，本示例使用RasterUserMatchTable加速图像分辨率转换的速度。结果如下图所示：