ContrastBrightnessIntensityCommand Class

Summary

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

Syntax

Objective-C

C++

Java

public class ContrastBrightnessIntensityCommand : RasterCommand

Public Class ContrastBrightnessIntensityCommand  
   Inherits RasterCommand

@interface LTContrastBrightnessIntensityCommand : LTRasterCommand

public class ContrastBrightnessIntensityCommand extends RasterCommand

public ref class ContrastBrightnessIntensityCommand : public RasterCommand

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 an 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.

Example

Run the ContrastBrightnessIntensityCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
 
public void ContrastBrightnessIntensityCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")); 
 
   // 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:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
 
Public Sub ContrastBrightnessIntensityCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")) 
 
   ' 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:\LEADTOOLS21\Resources\Images" 
End Class