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GrayScaleExtendedCommand Class

Summary

Converts any image to a gray scale image without changing its resolution.

Syntax
C#
VB
Java
Objective-C
C++
public class GrayScaleExtendedCommand : RasterCommand 
Public Class GrayScaleExtendedCommand  
   Inherits RasterCommand 
@interface LTGrayScaleExtendedCommand : LTRasterCommand 
public class GrayScaleExtendedCommand extends RasterCommand 
public ref class GrayScaleExtendedCommand : public RasterCommand   

Remarks
  • RedFactor + GreenFactor + BlueFactor must equal 1000. (Internally the values are divided by 1000).

  • For each pixel in the image the red, green and blue values are modified by the RedFactor, GreenFactor and BlueFactor properties, respectively. This allows the user to give more weight to one color, essentially enhancing that color, before the pixel is converted to grayscale.

  • For example, if an object of this class has the RedFactor set to 500, the GreenFactor set to 250 and the BlueFactor set to 250, the red value of each pixel will get 50 percent of the weight when determining the grayscale value. The green value will get 25 percent of the weight and the blue value will get 25 percent of the weight when determining the grayscale value. This highlights or enhances the red in the image, prior to conversion to grayscale.
  • 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 signed images.

For more information, refer to Grayscale Images.

Example

Run the GrayScaleExtendedCommand on an image with RedFactor = 300, GreenFactor = 590, and BlueFactor = 110.

C#
VB
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
 
public void GrayScaleExtendedCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample5.cmp")); 
 
   // Prepare the command 
   GrayScaleExtendedCommand command = new GrayScaleExtendedCommand(); 
   command.RedFactor = 300; 
   command.GreenFactor = 590; 
   command.BlueFactor = 110; 
   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"; 
} 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
 
Public Sub GrayScaleExtendedCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample5.cmp")) 
 
   ' Prepare the command 
   Dim command As GrayScaleExtendedCommand = New GrayScaleExtendedCommand 
   command.RedFactor = 300 
   command.GreenFactor = 590 
   command.BlueFactor = 110 
   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#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Examples; 
 
public void GrayScaleExtendedCommandExample(RasterImage image, Stream outStream) 
{ 
   // Prepare the command 
   GrayScaleExtendedCommand command = new GrayScaleExtendedCommand(); 
   command.RedFactor = 300; 
   command.GreenFactor = 590; 
   command.BlueFactor = 110; 
   command.Run(image); 
 
   // Save result image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24); 
   image.Dispose(); 
} 
vb[Silverlight VB Example] 
Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
 
Public Sub GrayScaleExtendedCommandExample(ByVal image As RasterImage, ByVal outStream As Stream) 
   ' Prepare the command 
   Dim command As GrayScaleExtendedCommand = New GrayScaleExtendedCommand() 
   command.RedFactor = 300 
   command.GreenFactor = 590 
   command.BlueFactor = 110 
   command.Run(image) 
 
   ' Save result image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24) 
   image.Dispose() 
End Sub 

Requirements

Target Platforms

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Leadtools.ImageProcessing.Color Assembly