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ContrastBrightnessIntensityCommand Class
See Also  Members   Example 




Applies contrast, brightness and intensity adjustments to enhance the image tonal range. This class is available in the Raster Pro and above toolkits.

Syntax

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

Example

Visual BasicCopy Code
ImageProcessing.Color.ContrastBrightnessIntensityCommand
   Public Sub ContrastBrightnessIntensityCommandExample()
      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 ContrastBrightnessIntensityCommand = New ContrastBrightnessIntensityCommand
      command.Contrast = -146
      command.Brightness = 358
      command.Intensity = 240
      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.ContrastBrightnessIntensityCommand 
      public void ContrastBrightnessIntensityCommandExample() 
      { 
         // 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 
         ContrastBrightnessIntensityCommand command = new ContrastBrightnessIntensityCommand(); 
         command.Contrast = -146; 
         command.Brightness = 358; 
         command.Intensity = 240; 
         command.Run(image); 
         codecs.Save(image, @"C:\Program Files\LEAD Technologies\LEADTOOLS 15\Images\Result.jpg", RasterImageFormat.Jpeg, 24); 
 
         RasterCodecs.Shutdown(); 
      }

Remarks

  • The transformations are applied in this order: Contrast, Brightness then Intensity. Were the three commands to be called separately, then after each method was applied calculated values less than 0 and more than 255 (for 8 bits per component for example) would be clamped to 0 and 255 respectively. Using this method, the values are accumulative and the final result would be clamped. In addition, this command is faster than calling each method separately.
  • It also can process the whole image or a region of the image. If a image has a region, the effect is applied only to the region.
  • This command 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 signed data images.
  • 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.ContrastBrightnessIntensityCommand

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