SampleTargetCommand Class

Corrects color values by shifting the sample colors to the target colors. This command is available in the Raster Pro and above toolkits.

Object Model

Syntax

Visual Basic
C#
WinRT C#
WinRT JavaScript
C++

public class SampleTargetCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration
 
Public Class SampleTargetCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage
 
Dim instance As SampleTargetCommand

public sealed class SampleTargetCommand : Leadtools.ImageProcessing.IRasterCommand

function Leadtools.ImageProcessing.Color.SampleTargetCommand()

public ref class SampleTargetCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

Remarks

For example, suppose you are working with a color image. In the SampleColor property or the sampleColor parameter, set the red value portion of the Leadtools.RasterColor structure to 125, the green portion to 165 and the blue portion to 100. In the TargetColor property or the targetColor parameter you set the red value portion to 170, the green to 120 and the blue to 200. If you set SampleTargetCommandFlags.Blue in the Flags property or the flags parameter, then for every pixel in the image that has a blue value of 100, that blue value will be changed to 200, thus shifting the colors in the image. Depending on whether you set SampleTargetCommandFlags.Low, SampleTargetCommandFlags.Mid, or SampleTargetCommandFlags.High, either the shadow values in the blue channel will be remapped, or the midtone values in the blue channel will be remapped, or the highlight values in the blue channel will be remapped.
This command supports 12 and 16-bit grayscale and 48 and 64-bit color images.
For gray scale images the gray value of the SampleColor and TargetColor properties or the sampleColor and targetColor parameters are used, and the different channel flags have the same effect since it works on the same channel (gray channel). 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 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 Correcting Colors.

Example

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

Public Sub SampleTargetCommandExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True

   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"))

   ' Prepare the command
   Dim command As SampleTargetCommand = New SampleTargetCommand
   command.SampleColor = New RasterColor(50, 100, 150)
   command.TargetColor = New RasterColor(60, 90, 150)
   command.Flags = SampleTargetCommandFlags.Red Or SampleTargetCommandFlags.High
   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

public void SampleTargetCommandExample()
   {
      // Load an image
      RasterCodecs codecs = new RasterCodecs();
      codecs.ThrowExceptionsOnInvalidImages = true;

      RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg"));

      // Prepare the command
      SampleTargetCommand command = new SampleTargetCommand();
      command.SampleColor = new RasterColor(50, 100, 150);
      command.TargetColor = new RasterColor(60, 90, 150);
      command.Flags       = SampleTargetCommandFlags.Red | SampleTargetCommandFlags.High;
      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";
}

[TestMethod]
public async Task SampleTargetCommandExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   // Load the image
   string srcFileName = @"Assets\Image1.cmp";
   StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName);
   RasterImage image = await codecs.LoadAsync(LeadStreamFactory.Create(loadFile));

   // Prepare the command
   SampleTargetCommand command = new SampleTargetCommand();
   command.SampleColor = RasterColorHelper.Create(50, 100, 150);
   command.TargetColor = RasterColorHelper.Create(60, 90, 150);
   command.Flags       = SampleTargetCommandFlags.Red | SampleTargetCommandFlags.High;
   command.Run(image);

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

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference