LEADTOOLS Image Processing (Leadtools.ImageProcessing.Color assembly) Send comments on this topic. | Back to Introduction - All Topics | Help Version 17.0.3.29
ContrastBrightnessIntensityCommand Class
See Also  Members  



Applies contrast, brightness and intensity adjustments to enhance the image tonal range. This class is available in the Raster Pro and above toolkits. Supported in Silverlight, Windows Phone 7

Object Model

ContrastBrightnessIntensityCommand Class

Syntax

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

Example

Run the Leadtools.ImageProcessing.Color.ContrastBrightnessIntensityCommand on an image.

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

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "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, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24)

End Sub

Public NotInheritable Class LEAD_VARS
   Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
C#Copy Code
public void ContrastBrightnessIntensityCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      ContrastBrightnessIntensityCommand command = new ContrastBrightnessIntensityCommand();
      command.Contrast = -146;
      command.Brightness = 358;
      command.Intensity = 240;
      command.Run(image);
      codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

   }

static class LEAD_VARS
{
   public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
SilverlightCSharpCopy Code
public void ContrastBrightnessIntensityCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   ContrastBrightnessIntensityCommand command = new ContrastBrightnessIntensityCommand();
   command.Contrast = -146;
   command.Brightness = 358;
   command.Intensity = 240;
   command.Run(image);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}
SilverlightVBCopy Code
Public Sub ContrastBrightnessIntensityCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As ContrastBrightnessIntensityCommand = New ContrastBrightnessIntensityCommand()
   command.Contrast = -146
   command.Brightness = 358
   command.Intensity = 240
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub

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: Silverlight, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)

See Also