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MathematicalFunctionCommand Class
See Also  Members   Example 




Re-maps the image colors according to a mathematical function such as: square, logarithm, square root, sine and cosine.

Syntax

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

Example

Visual BasicCopy Code
ImageProcessing.Color.MathematicalFunctionCommand
   Public Sub MathematicalFunctionCommandExample()
      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 command As MathematicalFunctionCommand = New MathematicalFunctionCommand
      command.Type = MathematicalFunctionCommandType.Square
      command.Factor = 50
      'Apply Square Function to this image.
      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.Color.MathematicalFunctionCommand 
      public void MathematicalFunctionCommandExample() 
      { 
         // 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 
         MathematicalFunctionCommand command = new MathematicalFunctionCommand(); 
         command.Type   = MathematicalFunctionCommandType.Square; 
         command.Factor = 50; 
         //Apply Square Function to this image. 
         command.Run(image); 
         codecs.Save(image, @"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Result.jpg", RasterImageFormat.Jpeg, 24); 
 
         RasterCodecs.Shutdown(); 
      }

Remarks

  • This class uses the RGB color space.
  • This class makes it possible to apply one of five mathematical functions to an image's pixel values: square, square root, logarithm, sine and cosine.
  • Set the mathematical operation to be performed on each pixel's values in the Type property. The resulting values are multiplied by the Factor property value. The Factor property can be any value greater than 0. It is divided internally by different amounts, according to the type of the function being used.
  • If the image has a region, the effect will be applied on the region only.
  • This class 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.
  • This command does not support 32-bit grayscale images.
For more information, refer to Changing Brightness and Contrast.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Color.MathematicalFunctionCommand

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