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GrayScaleToDuotoneCommand Class
See Also  Members   Example 



Converts the grayscale image into a colored one by mixing or replacing the original values of the pixels with new colors. This class is available in the Raster Pro and above toolkits.

Syntax

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

Example

Run the GrayScaleToDuotoneCommand on an image.

Visual BasicCopy Code
Public Sub GrayScaleToDuetoneCommandExample()
   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 GrayScaleToDuotoneCommand = New GrayScaleToDuotoneCommand
   'Apply duotone conversion.
   command.Type = GrayScaleToDuotoneCommandMixingType.ReplaceOldWithNew
   command.Color = New RasterColor(255, 0, 0)
   command.Run(leadImage)
   codecs.Save(leadImage, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24)

   RasterCodecs.Shutdown()
End Sub
C#Copy Code
public void GrayScaleToDuotoneCommandExample() 
{ 
   // 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 
   GrayScaleToDuotoneCommand command = new GrayScaleToDuotoneCommand(); 
   //Apply duotone conversion. 
   command.Type = GrayScaleToDuotoneCommandMixingType.ReplaceOldWithNew; 
   command.Color = new Leadtools.RasterColor(255, 0, 0); 
   command.Run(image); 
   codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24); 
 
   RasterCodecs.Shutdown(); 
}

Remarks

  • This class was designed for use with grayscale images. If the image being used is not grayscale, this method only affects those pixels or areas of the image where Red = Green = Blue.
  • This class transforms the 8-bit grayscale images into colored 8-bit images (Palette) meanwhile the 12-bit and 16-bit grayscale images are transformed into a 48-bit colored image.
  • Monotone conversion is possible by setting GrayScaleToDuotoneCommandMixingType to ReplaceOldWithNew, which clears the palette.
  • This method gives you the option of having the toolkit generate the array of colors to use or creating the array of colors to use yourself.
  • To have the toolkit generate the array of colors, pass the color to use for generating the array of gradient colors in the Color property.
    • If the image is binary, the GrayscaleMode property is used to determine the kind of grayscale palette being used. If the GrayscaleMode property is GrayscaleMode.OrderedInverse or GrayscaleMode.NotOrdered, then the color set in the Color property for the GrayScaleToDuotoneCommand will become the first color in the array generated by the toolkit, NewColor[0], and the toolkit will create the second color in the array NewColor[1]. If the GrayscaleMode property is a value other than GrayscaleMode.OrderedInverse or GrayscaleMode.NotOrdered, then the color set in the Color property for the GrayScaleToDuotoneCommand will become the second color in the array generated by the toolkit, NewColor[1], and the toolkit will create the first color in the array NewColor[0].
    • If the image is grayscale (not binary) the GrayScaleToDuotoneCommand will use the color set in the Color property and generate a 256 color gradient in NewColor.
    • If the image is not grayscale (it is color) then the GrayScaleToDuotoneCommand will use the color set in the Color property and generate a 256 color gradient in NewColor. These colors will be used to change only those pixels in the color image for which Red = Green = Blue.
  • To use a user-defined array of colors:
    • If the image is binary, call GrayScaleToDuotoneCommand with the two colors you wish to use in the NewColor property.
    • If the image is grayscale (not binary) call GrayScaleToDuotoneCommand with the 256 colors you wish to use in the NewColor property.
    • If the image is not grayscale (it is color) call GrayScaleToDuotoneCommand with the 256 colors you wish to use in the NewColor property. These colors will be used to change only those pixels in the color image for which Red = Green = Blue.
  • 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 class does not support signed data images.
  • This command does not support 32-bit grayscale images.
For more information, refer to Introduction to Image Processing With LEADTOOLS.
For more information, refer to Grayscale Images.

Inheritance Hierarchy

System.Object
   Leadtools.ImageProcessing.RasterCommand
      Leadtools.ImageProcessing.Color.GrayScaleToDuotoneCommand

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