AddNoiseCommand Constructor(int,RasterColorChannel)

Summary

Initializes a new AddNoiseCommand class object with explicit parameters.

Syntax

Objective-C

C++

Java

public AddNoiseCommand( 
   int range, 
   RasterColorChannel channel 
)

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).

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:\LEADTOOLS21\Resources\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:\LEADTOOLS21\Resources\Images" 
End Class

Requirements

Target Platforms

Reference

AddNoiseCommand Class

AddNoiseCommand Members

Overload List

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Help Version 21.0.2021.7.2

Leadtools.ImageProcessing.Effects Assembly

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Leadtools.ImageProcessing.Effects Namespace

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