AddNoiseCommand Constructor(int,RasterColorChannel)

Summary

Initializes a new AddNoiseCommand class object with explicit parameters.

Syntax

Objective-C

C++/CLI

Java

Python

public AddNoiseCommand( 
   int range, 
   RasterColorChannel channel 
)

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

public AddNoiseCommand( 
   int range, 
   RasterColorChannel channel 
);

public: 
AddNoiseCommand(  
   int range, 
   RasterColorChannel channel 
)

__init__(self,range,channel) # Overloaded constructor

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:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

AddNoiseCommand Class

AddNoiseCommand Members

Overload List

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Help Version 22.0.2023.3.31

Leadtools.ImageProcessing.Effects Assembly

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Leadtools.ImageProcessing.Effects Namespace

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