Leadtools.ImageProcessing.Color Send comments on this topic. | Back to Introduction - All Topics | Help Version 16.5.9.25
MultiplyCommand Class
See Also  Members   Example 



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

Syntax

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

Example

Run the MultiplyCommand on an image with factor = 1.51.

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

   Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg")

   ' Prepare the command
   Dim command As MultiplyCommand = New MultiplyCommand
   command.Factor = 151
   ' Multiply the colors of the bitmap with 1.51.
   command.Run(leadImage)
   codecs.Save(leadImage, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24)

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void MultiplyCommandExample() 
{ 
   // Load an image 
   RasterCodecs.Startup(); 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg"); 
 
   // 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, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24); 
 
   RasterCodecs.Shutdown(); 
}

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.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Color.MultiplyCommand

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