←Select platform

AddNoiseCommand Constructor(int,RasterColorChannel)

Summary

Initializes a new AddNoiseCommand class object with explicit parameters.

Syntax
C#
VB
Objective-C
C++
Java
Public Function New( _ 
   ByVal range As Integer, _ 
   ByVal channel As RasterColorChannel _ 
) 
- (instancetype)initWithRange:(NSUInteger)range channel:(LTRasterColorChannel)channel 
public AddNoiseCommand( 
   int range,  
   RasterColorChannel 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.

Remarks

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)) 

Example

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

C#
VB
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"; 
} 
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 
c#[Silverlight C# Example] 
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(); 
} 
vb[Silverlight VB Example] 
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 
Requirements

Target Platforms

Help Version 20.0.2019.11.25
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2020 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.ImageProcessing.Effects Assembly