Fixed Method

Summary

Creates an array of RasterColor objects that represent the LEAD Fixed palette.

Syntax

Objective-C

C++/CLI

Java

Python

public static RasterColor[] Fixed( 
   int count 
)

+(NSArray*)fixed:(unsigned int)count;

public static RasterColor[] fixed( 
   int count 
);

public: 
static array<RasterColor>^ Fixed(  
   int count 
)

def Fixed(self,count):

Parameters

count
The number of colors to add to the fixed palette.

Return Value

The LEAD Fixed palette.

Remarks

The number of colors specified in count controls the type and size of the returned palette:

count	LEAD Fixed palette
2	1-bit palette, with 2 colors, black and white.
4	2-bit palette, with 4 colors.
8	3-bit palette, with 8 colors.
16	4-bit palette, with 16 colors.
32	5-bit palette, with 32 colors.
64	6-bit palette, with 64 colors.
128	7-bit palette, with 128 colors.
256	8-bit palette, with 256 colors.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
using Leadtools.ImageProcessing.Color; 
using Leadtools.Dicom; 
using Leadtools.Drawing; 
using Leadtools.Controls; 
using Leadtools.Svg; 
 
 
public void StartDitheringExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
	// Load an image that has BottomLeft ViewPerspective 
	RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")); 
 
	RasterColor[] Palette = RasterPalette.Fixed(256); 
 
	// Create the new palletized image. 
	RasterImage destinationImage = new RasterImage(RasterMemoryFlags.Conventional, image.Width, image.Height, 8, image.Order, image.ViewPerspective, Palette, IntPtr.Zero, 0); 
 
	// Set the dithering method. 
	image.DitheringMethod = RasterDitheringMethod.StevensonArce; 
 
	// Initialize the dithering process. 
	image.StartDithering(Palette, 256); 
 
	// Allocate the output buffer for 8-bit data. 
	byte[] InBuffer = new byte[image.Width * 3];// Buffer to hold the input row. 
	byte[] OutBuffer = new byte[image.Width];// Buffer to hold the output row. 
 
	// Use DitherLine method to process each row in the image. 
	image.Access(); 
	destinationImage.Access(); 
	for (int i = 0; i < image.Height; i++) 
	{ 
		image.GetRow(i, InBuffer, 0, image.BytesPerLine); 
		image.DitherLine(InBuffer, 0, OutBuffer, 0); 
		destinationImage.SetRow(i, OutBuffer, 0, destinationImage.BytesPerLine); 
	} 
	destinationImage.Release(); 
	image.Release(); 
 
	// End the dithering process. 
	image.StopDithering(); 
 
	codecs.Save(destinationImage, Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1_DitherLine.BMP"), RasterImageFormat.Bmp, 0); 
 
	image.Dispose(); 
	destinationImage.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterPalette Class

RasterPalette Members

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Help Version 22.0.2023.5.16

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies