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PerspectiveCommand Class
See Also  Members   Example 
Leadtools.ImageProcessing.SpecialEffects Namespace : PerspectiveCommand Class




Gives the image a 3-D depth, as if it exists on a flat plane skewed into different shapes. This command is available in the Raster Pro and above toolkits.

Syntax

Visual Basic (Declaration) 
Public Class PerspectiveCommand 
   Inherits RasterCommand
   Implements IRasterCommand 
Visual Basic (Usage)Copy Code
Dim instance As PerspectiveCommand
C# 
public class PerspectiveCommand : RasterCommand, IRasterCommand 
Managed Extensions for C++ 
public __gc class PerspectiveCommand : public RasterCommand, IRasterCommand 
C++/CLI 
public ref class PerspectiveCommand : public RasterCommand, IRasterCommand 

Example

Visual BasicCopy Code
ImageProcessing.SpecialEffects.PerspectiveCommand
   Public Sub PerspectiveCommandExample()
      RasterCodecs.Startup()
      Dim codecs As New RasterCodecs()
      codecs.ThrowExceptionsOnInvalidImages = True

      Dim leadImage As RasterImage = codecs.Load("C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Master.jpg")

      ' Prepare the command
      Dim cornerPoints() As Point
      ReDim cornerPoints(3)
      cornerPoints(0).X = CInt(leadImage.Width * 3 / 9)
      cornerPoints(0).Y = CInt(leadImage.Height * 1 / 12)
      cornerPoints(1).X = CInt(leadImage.Width * 3 / 4)
      cornerPoints(1).Y = CInt(leadImage.Height * 2 / 12)
      cornerPoints(2).X = CInt(leadImage.Width * 2 / 10)
      cornerPoints(2).Y = CInt(leadImage.Height * 8 / 10)
      cornerPoints(3).X = CInt(leadImage.Width * 10 / 11)
      cornerPoints(3).Y = CInt(leadImage.Height * 7 / 10)
      Dim command As New PerspectiveCommand
      command.CornerPoints = cornerPoints
      command.FillColor = New RasterColor(255, 255, 255)
      command.Type = PerspectiveCommandType.Color
      command.Run(leadImage)
      codecs.Save(leadImage, "C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Result.jpg", RasterImageFormat.Jpeg, 24)

      RasterCodecs.Shutdown()
   End Sub
C#Copy Code
ImageProcessing.SpecialEffects.PerspectiveCommand 
      public void PerspectiveCommandExample() 
      { 
         // Load an image 
         RasterCodecs.Startup(); 
         RasterCodecs codecs = new RasterCodecs(); 
         codecs.ThrowExceptionsOnInvalidImages = true; 
 
         RasterImage image = codecs.Load(@"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Master.jpg"); 
 
         // Prepare the command 
         Point[] cornerPoint = new Point[4]; 
         cornerPoint[0].X = image.Width * 3 / 9; 
         cornerPoint[0].Y = image.Height * 1 / 12; 
         cornerPoint[1].X = image.Width * 3 / 4; 
         cornerPoint[1].Y = image.Height * 2 / 12; 
         cornerPoint[2].X = image.Width * 2 / 10; 
         cornerPoint[2].Y = image.Height * 8 / 10; 
         cornerPoint[3].X = image.Width * 10 / 11; 
         cornerPoint[3].Y = image.Height * 7 / 10; 
         PerspectiveCommand command  = new PerspectiveCommand(); 
         command.CornerPoints = cornerPoint; 
         command.FillColor = new RasterColor(255, 255, 255); 
         command.Type = PerspectiveCommandType.Color; 
         command.Run(image); 
         codecs.Save(image, @"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Result.jpg", RasterImageFormat.Jpeg, 24); 
 
         RasterCodecs.Shutdown(); 
      }

Remarks

  • This method supports 12 and 16-bit grayscale and 48 and 64-bit color images. Support for 12 and 16-bit grayscale and 48 and 64-bit color images is available only in the Document/Medical toolkits.
  • If the image has a region, this method works only on the region. If the image does not have a region, this method works on the entire image.
  • This method does not support signed data images.
  • This command does not support 32-bit grayscale images.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.SpecialEffects.PerspectiveCommand

Requirements

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

See Also