ColorReplaceCommand Class

Summary

Replaces the specified color by adjusting values of hue, saturation and brightness.

Syntax

Objective-C

C++

Java

public class ColorReplaceCommand : RasterCommand

Public Class ColorReplaceCommand  
   Inherits RasterCommand

@interface LTColorReplaceCommand : LTRasterCommand

public class ColorReplaceCommand extends RasterCommand

public ref class ColorReplaceCommand : public RasterCommand

Remarks

This command replaces the specified color by adjusting value of hue, saturation and brightness. The value of the Fuzziness property of the ColorReplaceCommandColor class determines the range around each color where the pixels will be changed according to Hue, Saturation and Brightness.
This command 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 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

Run the ColorReplaceCommand on an image to change the red color by rotating its hue 90 degree.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
 
public void ColorReplaceCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg")); 
 
   // Prepare the command 
   ColorReplaceCommand command = new ColorReplaceCommand(); 
   ColorReplaceCommandColor[] data = new ColorReplaceCommandColor[1]; 
   data[0] = new ColorReplaceCommandColor(); 
   data[0].Color = new RasterColor(200, 0, 35); 
   data[0].Fuzziness = 100; 
   command.Colors = data; 
   command.Hue = 9000; 
   command.Saturation = 0; 
   command.Brightness = 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"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
 
Public Sub ColorReplaceCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "cannon.jpg")) 
 
   ' Prepare the command 
   Dim command As ColorReplaceCommand = New ColorReplaceCommand 
   Dim Data() As ColorReplaceCommandColor 
   ReDim Data(0) 
   Data(0) = New ColorReplaceCommandColor 
   Data(0).Color = New RasterColor(200, 0, 35) 
   Data(0).Fuzziness = 300 
   command.Colors = Data 
   command.Hue = 9000 
   command.Saturation = 0 
   command.Brightness = 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

c#[Silverlight C# Example] 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Examples; 
 
public void ColorReplaceCommandExample(RasterImage image, Stream outStream) 
{ 
   // Prepare the command 
   ColorReplaceCommand command = new ColorReplaceCommand(); 
   ColorReplaceCommandColor[] data = new ColorReplaceCommandColor[1]; 
   data[0] = new ColorReplaceCommandColor(); 
   data[0].Color = new RasterColor(200, 0, 35); 
   data[0].Fuzziness = 100; 
   command.Colors = data; 
   command.Hue = 9000; 
   command.Saturation = 0; 
   command.Brightness = 0; 
   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 ColorReplaceCommandExample(ByVal image As RasterImage, ByVal outStream As Stream) 
   ' Prepare the command 
   Dim command As ColorReplaceCommand = New ColorReplaceCommand() 
   Dim data As ColorReplaceCommandColor() = New ColorReplaceCommandColor(0) {} 
   data(0) = New ColorReplaceCommandColor() 
   data(0).Color = New RasterColor(200, 0, 35) 
   data(0).Fuzziness = 100 
   command.Colors = data 
   command.Hue = 9000 
   command.Saturation = 0 
   command.Brightness = 0 
   command.Run(image) 
 
   ' Save result image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24) 
   image.Dispose() 
End Sub