ChangeContrastCommandクラス

C#
Visual Basic
WinRT C#
Java
Objective-C
WinRT JavaScript
C++

public class ChangeContrastCommand : Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

'Declaration

Public Class ChangeContrastCommand 
   Inherits Leadtools.ImageProcessing.RasterCommand
   Implements Leadtools.ImageProcessing.IRasterCommand

'Usage

Dim instance As ChangeContrastCommand

public sealed class ChangeContrastCommand : Leadtools.ImageProcessing.IRasterCommand

@interface LTChangeContrastCommand : LTRasterCommand

public class ChangeContrastCommand extends RasterCommand

function Leadtools.ImageProcessing.Color.ChangeContrastCommand()

public ref class ChangeContrastCommand : public Leadtools.ImageProcessing.RasterCommand, Leadtools.ImageProcessing.IRasterCommand

このコマンドは、12と16ビットグレースケールと48と64ビットカラーイメージをサポートします。12と16ビットグレースケールと48と64ビットカラーイメージのサポートは、Document／Medicalツールキットだけで利用できます。
このコマンドは、32ビットグレースケールイメージをサポートしません。
このコマンドは、符号付き/符号なしデータイメージをサポートします。

画像にLUTがあり画像データ上で作業する場合は、RasterImage.UseLookupTableをFalseに設定します。メソッドを呼び出した後で、以下のようにUselookupTableプロパティをTrueにリセットします。

rasterImage.UseLookupTable = false; Method(rasterImage); rasterImage.UseLookupTable = true; 詳細については、「明度とコントラストの変更」を参照してください。

imageの上でChangeContrastCommandを実行して、そのコントラストを増やします。

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing.Color

   
Public Sub ChangeContrastCommandExample()
   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
   'Increase the contrast  by 25 percent  of the possible range.
   command.Contrast = 250

   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 ChangeContrastCommandExample()
{
   // 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();
   //Increase the contrast  by 25 percent  of the possible range.
   command.Contrast = 250;
   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 ChangeContrastCommandExample()
{
   // 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();
   //Increase the contrast  by 25 percent  of the possible range.
   command.Contrast = 250;
   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 ChangeContrastCommandExample(RasterImage image, Stream outStream)
{
   // Prepare the command
   ChangeContrastCommand command = new ChangeContrastCommand();
   //Increase the contrast  by 25 percent  of the possible range.
   command.Contrast = 250;
   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 ChangeContrastCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
   ' Prepare the command
   Dim command As ChangeContrastCommand = New ChangeContrastCommand()
   'Increase the contrast  by 25 percent  of the possible range.
   command.Contrast = 250
   command.Run(image)
   ' Save result image
   Dim codecs As RasterCodecs = New RasterCodecs()
   codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
   image.Dispose()
End Sub

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参照