MultiplyCommand Class

Summary

Increases or decreases the brightness in the image by multiplying the colors in a specific image by a factoring value divided by 100.

Syntax

Objective-C

C++/CLI

Java

Python

public class MultiplyCommand : RasterCommand

@interface LTMultiplyCommand : LTRasterCommand

public class MultiplyCommand 
    extends RasterCommand

public ref class MultiplyCommand : public RasterCommand

class MultiplyCommand(RasterCommand):

Remarks

This class is used to increase or decrease the brightness in the image by multiplying the colors in a specific image by a factoring value divided by 100. For example, if the factoring value is 131, the colors in the image will be multiplied by 1.31.
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.

If the image has a LUT and you want to work on the image data, set RasterImage.UseLookupTable to false. Then, after calling the method, reset the UselookupTable property to true, as follows:

rasterImage.UseLookupTable = false; 
Method(rasterImage); 
rasterImage.UseLookupTable = true;

For more information, refer to Changing Brightness and Contrast.

Multiply Function - Before

Multiply Function - After

View additional platform support for this Multiply function.

Example

Run the MultiplyCommand on an image with factor = 1.51.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
 
 
public void MultiplyCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")); 
 
   // Prepare the command 
   MultiplyCommand command = new MultiplyCommand(); 
   command.Factor = 151; 
   // Multiply the colors of the bitmap with 1.51. 
   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.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.color.MultiplyCommand; 
 
 
public void multiplyCommandExample() { 
   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 
   MultiplyCommand command = new MultiplyCommand(); 
   command.setFactor(151); 
   assertTrue(command.getFactor() == 151); 
   // Multiply the colors of the bitmap with 1.51. 
   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()); 
}