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ChangeContrastCommand Constructor(Int32)

Summary

Initializes a new ChangeContrastCommand class object with explicit parameters.

Syntax

Java

Objective-C

WinRT C#

C++

public ChangeContrastCommand(  
   int contrast 
)

Public Function New( _ 
   ByVal contrast As Integer _ 
)

public ChangeContrastCommand(  
   int contrast 
)

- (instancetype)initWithContrast:(NSInteger)contrast

public ChangeContrastCommand(int contrast)

function ChangeContrastCommand(  
   contrast  
)

public: 
ChangeContrastCommand(  
   int contrast 
)

Parameters

contrast
Amount of contrast change. Valid values are -1000 to +1000.

Example

Run the ChangeContrastCommand on an image and increase its contrast.

WinRT C#

Silverlight C#

Silverlight VB

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Color 
 
    
Public Sub ChangeContrastConstructorExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\Image1.jpg")) 
 
   ' Prepare the command 
   Dim command As ChangeContrastCommand = New ChangeContrastCommand(250) 
   'Increase the contrast  by 25 percent  of the possible range. 
   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.Color; 
 
       
public void ChangeContrastConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\\Image1.jpg")); 
 
   // Prepare the command 
   ChangeContrastCommand command = new ChangeContrastCommand(250); 
 
   // Increase the contrast  by 25 percent  of the possible range. 
   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.Color; 
 
       
public async Task ChangeContrastConstructorExample() 
{ 
   // 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 
   ChangeContrastCommand command = new ChangeContrastCommand(250); 
 
   // Increase the contrast  by 25 percent  of the possible range. 
   command.Run(image); 
 
   string destFileName = @"result.jpg"; 
   StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName); 
   await codecs.SaveAsync(image, LeadStreamFactory.Create(saveFile), RasterImageFormat.Jpeg, 0); 
}

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Examples; 
 
public void ChangeContrastConstructorExample(RasterImage image, Stream outStream) 
{ 
   // Prepare the command 
   ChangeContrastCommand command = new ChangeContrastCommand(250); 
   // Increase the contrast  by 25 percent  of the possible range. 
   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.Color 
 
Public Sub ChangeContrastConstructorExample(ByVal image As RasterImage, ByVal outStream As Stream) 
   ' Prepare the command 
   Dim command As ChangeContrastCommand = New ChangeContrastCommand(250) 
   ' Increase the contrast  by 25 percent  of the possible range. 
   command.Run(image) 
 
   ' Save result image 
   Dim codecs As RasterCodecs = New RasterCodecs() 
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24) 
   image.Dispose() 
End Sub