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DitheringMethod Property

Summary
Gets or sets the dithering method to use.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public RasterDitheringMethod DitheringMethod { get; set; } 
@property (nonatomic, assign) LTRasterDitheringMethod ditheringMethod; 
public RasterDitheringMethod getDitheringMethod() 
public void setDitheringMethod(RasterDitheringMethod value) 
public: 
property RasterDitheringMethod DitheringMethod { 
   RasterDitheringMethod get(); 
   void set (    RasterDitheringMethod ); 
} 
DitheringMethod # get and set (CodecsThumbnailOptions) 

Property Value

The dithering method to use.

Remarks

The DitheringMethod will be passed to ColorResolutionCommand internally when MaintainAspectRatio is true, ForceSize is true, and the source image is not 24-bit. In this case, the thumbnail image is converted to 24-bit, then, combined with a "background" image. The resulting image is then returned to the thumbnail image's original bit-depth using DitheringMethod.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Svg; 
 
 
public void ReadThumbnailExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
 
   // Create a thumbnail with default options 
   CodecsThumbnailOptions options = CodecsThumbnailOptions.Default; 
   options.LoadStamp = false; 
   RasterImage thumbnail = codecs.ReadThumbnail(srcFileName, options, 1); 
 
   Debug.WriteLine("Thumbnail with default option:"); 
   Debug.WriteLine("  Size: {0} by {1} pixels. Bits/Pixel: {2}", thumbnail.Width, thumbnail.Height, thumbnail.BitsPerPixel); 
   thumbnail.Dispose(); 
 
   // Create a thumbnail with some options 
   options.LoadStamp = false; 
   options.Width = 40; 
   options.Height = 80; 
   options.ForceSize = true; 
   options.MaintainAspectRatio = false; 
   options.BackColor = RasterColor.FromKnownColor(RasterKnownColor.LightBlue); 
   options.BitsPerPixel = 8; 
   options.DitheringMethod = RasterDitheringMethod.None; 
   options.Order = RasterByteOrder.Rgb; 
   options.PaletteFlags = ColorResolutionCommandPaletteFlags.None; 
   options.Resample = false; 
   thumbnail = codecs.ReadThumbnail(srcFileName, options, 1); 
 
   Debug.WriteLine("Thumbnail with set option (size: {0} by {1}, Bits/Pixel: {2}, ForeSize: {3}", 
      options.Width, options.Height, options.BitsPerPixel, options.ForceSize); 
   Debug.WriteLine("  Size: {0} by {1} pixels. Bits/Pixel: {2}", thumbnail.Width, thumbnail.Height, thumbnail.BitsPerPixel); 
   thumbnail.Dispose(); 
 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 22.0.2023.5.5
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Codecs Assembly

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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.