DitheringMethod Property

Summary

The dithering options used when converted the image.

Syntax

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 (ColorResolutionCommand)

Property Value

The dithering option used when converted the image.

Remarks

The dithering method is useful only when the resulting image requires a palette (when it is 8 bits per pixel or less).

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void ColorResolutionCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres8.bmp"); 
	string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_colorres4.bmp"); 
 
	// Load the source image from disk 
	RasterImage image = codecs.Load(srcFileName); 
 
	// First color-res it to 8 bits per pixel  using the Netscape palette into a seperate image 
	ColorResolutionCommand cmd = new ColorResolutionCommand(); 
	cmd.Mode = ColorResolutionCommandMode.CreateDestinationImage; 
	cmd.BitsPerPixel = 8; 
	cmd.Order = RasterByteOrder.Rgb; 
	cmd.DitheringMethod = RasterDitheringMethod.None; 
	cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.UsePalette; 
	cmd.SetPalette(RasterPalette.Netscape()); 
	cmd.Run(image); 
 
	RasterImage destImage = cmd.DestinationImage; 
	Assert.IsTrue(destImage.BitsPerPixel == 8); 
 
	// Save it to disk 
	codecs.Save(destImage, destFileName1, RasterImageFormat.Bmp, 8); 
	destImage.Dispose(); 
 
	// Now color-res the image in-place to 4-bits per pixel using the Optimized palette 
	cmd.Mode = ColorResolutionCommandMode.InPlace; 
	cmd.BitsPerPixel = 4; 
	cmd.Order = RasterByteOrder.Rgb; 
	cmd.DitheringMethod = RasterDitheringMethod.None; 
	cmd.PaletteFlags = ColorResolutionCommandPaletteFlags.Optimized; 
	cmd.Run(image); 
	Assert.IsTrue(image.BitsPerPixel == 4); 
 
	// Save it to disk 
	codecs.Save(image, destFileName2, RasterImageFormat.Bmp, 4); 
 
	// Clean Up 
	destImage.Dispose(); 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}