ContrastBrightnessIntensityCommand Class

Summary

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

Syntax

Objective-C

C++/CLI

Java

Python

public class ContrastBrightnessIntensityCommand : RasterCommand

@interface LTContrastBrightnessIntensityCommand : LTRasterCommand

public class ContrastBrightnessIntensityCommand 
    extends RasterCommand

public ref class ContrastBrightnessIntensityCommand : public RasterCommand

class ContrastBrightnessIntensityCommand(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.

Contrast Brightness Intensity Function - Before

Contrast Brightness Intensity Function - After

View additional platform support for this Contrast Brightness Intensity function.

Example

Run the ContrastBrightnessIntensityCommand on an image.

Java

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:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.assertTrue; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.color.*; 
 
 
public void contrastBrightnessIntensityCommandExample() { 
 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "IMAGE1.CMP")); 
 
   // Prepare the command 
   ContrastBrightnessIntensityCommand command = new ContrastBrightnessIntensityCommand(); 
   command.setContrast(-146); 
   command.setBrightness(358); 
   command.setIntensity(240); 
   command.run(image); 
   codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
 
   System.out.println("Command run and image saved to " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
   assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
 
}