GrayScaleToDuotoneCommand Class

• 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.

Run the GrayScaleToDuotoneCommand on an image.

• C#
• Visual Basic
• WinRT C#
• WinRT JavaScript
• Silverlight C#
• Silverlight VB

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Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color

   
Public Sub GrayScaleToDuetoneCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\Beauty16.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, 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

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Color;

      
public void GrayScaleToDuotoneCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\Beauty16.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, Path.Combine(LEAD_VARS.ImagesDir, "Result.jpg"), RasterImageFormat.Jpeg, 24);

}

static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Color;

      
public async Task GrayScaleToDuotoneCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\IMAGE2.dcm";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   GrayScaleToDuotoneCommand command = new GrayScaleToDuotoneCommand();
   //Apply duotone conversion.
   command.Type = GrayScaleToDuotoneCommandMixingType.ReplaceOldWithNew;
   command.Color = Leadtools.RasterColorHelper.Create(255, 0, 0);
   command.Run(image);

   string destFileName = @"result.jpg";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Jpeg, 0);
}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Color;
using Leadtools.Examples;

public void GrayScaleToDuotoneCommandExample(RasterImage image, Stream outStream)
{
   // 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);
   // Save result image
   RasterCodecs codecs = new RasterCodecs();
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
   image.Dispose();
}

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color

Public Sub GrayScaleToDuotoneCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' 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(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub

Target Platforms

Reference

GrayScaleToDuotoneCommand Members
Leadtools.ImageProcessing.Color Namespace
Introduction to Image Processing With LEADTOOLS
Grayscale Images
Leadtools.ImageProcessing.GrayscaleCommand
Leadtools.RasterImage.IsGray
GrayScaleToMultitoneCommand Class