AddNoiseCommand Constructor(Int32,RasterColorChannel)

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public AddNoiseCommand( 
   int range,
   RasterColorChannel channel
)

'Declaration

Public Function New( _
   ByVal range As Integer, _
   ByVal channel As RasterColorChannel _
)

'Usage

Dim range As Integer
Dim channel As RasterColorChannel
 
Dim instance As New AddNoiseCommand(range, channel)

public AddNoiseCommand( 
   int range,
   RasterColorChannel channel
)

- (instancetype)initWithRange:(NSUInteger)range channel:(LTRasterColorChannel)channel

public AddNoiseCommand(
   int range, 
   RasterColorChannel channel
)

function AddNoiseCommand( 
   range ,
   channel 
)

public:
AddNoiseCommand( 
   int range,
   RasterColorChannel channel
)

Parameters

range: Percentage of coverage, expressed in tenths of a percent. Valid values are 0 to 1000.
channel: value that represents the color plane to which to add the noise.

In order to speed up widely used image processing filters in LEADTOOLS, the grayscale value (master channel) of a colored image is calculated using the following formulas:

            #define CalcGrayValue(r, g, b) ((L_UCHAR)(((L_UCHAR) (((2 * (L_UINT) (r)) + (5 * (L_UINT) (g)) + (L_UINT) (b) + 4) / 8))))
            #define CalcGrayValue16(r, g, b) ((L_UINT16) (((2 * (L_UINT32) (r)) + (5 * (L_UINT32) (g)) + (L_UINT32) (b) + 4) / 8))
            #define CalcGrayValue32(r, g, b) ((L_UINT32) (((2 * (L_UINT32) (r)) + (5 * (L_UINT32) (g)) + (L_UINT32) (b) + 4) / 8))

Run the AddNoiseCommand to add red noise to the image(Default constructor example).

C#
Visual Basic
WinRT C#
WinRT JavaScript
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Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Effects

   
Public Sub AddNoiseConstructorExample()
   Dim codecs As New RasterCodecs()
   codecs.ThrowExceptionsOnInvalidImages = True
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample2.cmp"))

   ' Prepare the command
   Dim command As AddNoiseCommand = New AddNoiseCommand(250, RasterColorChannel.Red)
   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;
using Leadtools.ImageProcessing.Effects;

      
public void AddNoiseConstructorExample()
{
   // Load an image
   RasterCodecs codecs = new RasterCodecs();
   codecs.ThrowExceptionsOnInvalidImages = true;
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "sample2.cmp"));

   // Prepare the command
   AddNoiseCommand command = new AddNoiseCommand(250, RasterColorChannel.Red);
   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.Effects;
using Leadtools.ImageProcessing;

      
public async Task AddNoiseConstructorExample()
{
   // 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
   AddNoiseCommand command = new AddNoiseCommand(250, RasterColorChannel.Red);
   command.Run(image);
   //Save as BMP
   string destFileName = @"result.bmp";
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName);
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Bmp, 24);

}

using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Effects;
using Leadtools.Examples;

public void AddNoiseConstructorExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   AddNoiseCommand command = new AddNoiseCommand(250, RasterColorChannel.Red);
   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
Imports Leadtools.ImageProcessing.Effects

Public Sub AddNoiseConstructorExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As AddNoiseCommand = New AddNoiseCommand(250, RasterColorChannel.Red)
   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

AddNoiseCommand Class
AddNoiseCommand Members
Overload List