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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 
C++/CLI 
public ref class MathematicalFunctionCommand : public RasterCommand, IRasterCommand 

Example

Run the MathematicalFunctionCommand on an image with square function selected and factor = 50.

Visual BasicCopy Code
Public Sub MathematicalFunctionCommandExample()
   RasterCodecs.Startup()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "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, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24)

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void MathematicalFunctionCommandExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "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, LeadtoolsExamples.Common.ImagesPath.Path + "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