LeadTools创建“加速图像分辨率转换 ”程序步骤

2026-02-26 12:38:12

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.dll

Leadtools.Codecs.dll

Leadtools.Codecs.Bmp.dll

Leadtools.Codecs.Cmp.dll

Leadtools.ImageProcessing.Core.dll

Leadtools.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: // 加载图像

2: codecs = new RasterCodecs();

4: codecs.ThrowExceptionsOnInvalidImages = true;

5: image = codecs.Load(Path.Combine(Application.StartupPath, @"..\..\Pic\IMAGE25pxp"));

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: {

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 table

29: 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：

LeadTools创建“加速图像分辨率转换 ”程序步骤