Use Method

Summary

Selects a table that speeds conversion when using a palette that you create

Syntax

C++/CLI

Python

public void Use()

public: 
void Use();

def Use(self):

Remarks

For more information, refer to RasterUserMatchTable.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void RasterUserMatchTableExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "RasterUserMatchTable.bmp"); 
 
	// Load the image from disk 
	RasterImage image = codecs.Load(srcFileName); 
 
	// 64-color rainbow palette 
	RasterColor[] colors = 
	{ 
	new RasterColor(0, 0, 0), new RasterColor(0, 0, 85), new RasterColor(0, 0, 170), new RasterColor(0, 0, 255), 
	new RasterColor(85, 0, 0), new RasterColor(85, 0, 85), new RasterColor(85, 0, 170), new RasterColor(85, 0, 255), 
	new RasterColor(170, 0, 0), new RasterColor(170, 0, 85), new RasterColor(170, 0, 170), new RasterColor(170, 0, 255), 
	new RasterColor(255, 0, 0), new RasterColor(255, 0, 85), new RasterColor(255, 0, 170), new RasterColor(255, 0, 255), 
	new RasterColor(0, 85, 0), new RasterColor(0, 85, 85), new RasterColor(0, 85, 170), new RasterColor(0, 85, 255), 
	new RasterColor(85, 85, 0), new RasterColor(85, 85, 85), new RasterColor(85, 85, 170), new RasterColor(85, 85, 255), 
	new RasterColor(170, 85, 0), new RasterColor(170, 85, 85), new RasterColor(170, 85, 170), new RasterColor(170, 85, 255), 
	new RasterColor(255, 85, 0), new RasterColor(255, 85, 85), new RasterColor(255, 85, 170), new RasterColor(255, 85, 255), 
	new RasterColor(0, 170, 0), new RasterColor(0, 170, 85), new RasterColor(0, 170, 170), new RasterColor(0, 170, 255), 
	new RasterColor(85, 170, 0), new RasterColor(85, 170, 85), new RasterColor(85, 170, 170), new RasterColor(85, 170, 255), 
	new RasterColor(170, 170, 0), new RasterColor(170, 170, 85), new RasterColor(170, 170, 170), new RasterColor(170, 170, 255), 
	new RasterColor(255, 170, 0), new RasterColor(255, 170, 85), new RasterColor(255, 170, 170), new RasterColor(255, 170, 255), 
	new RasterColor(0, 255, 0), new RasterColor(0, 255, 85), new RasterColor(0, 255, 170), new RasterColor(0, 255, 255), 
	new RasterColor(85, 255, 0), new RasterColor(85, 255, 85), new RasterColor(85, 255, 170), new RasterColor(85, 255, 255), 
	new RasterColor(170, 255, 0), new RasterColor(170, 255, 85), new RasterColor(170, 255, 170), new RasterColor(170, 255, 255), 
	new RasterColor(255, 255, 0), new RasterColor(255, 255, 85), new RasterColor(255, 255, 170), new RasterColor(255, 255, 255) 
 }; 
 
	// Create and set the user match table 
	RasterUserMatchTable userMatchTable = new RasterUserMatchTable(); 
	userMatchTable.Create(colors); 
	userMatchTable.Use(); 
 
	// Change the color resolution using the new palette. Note that the user match table 
	// is makes your code faster only if you use it more than once. It is included here only  
	// to show how it can be coded. 
 
	ColorResolutionCommand command = new ColorResolutionCommand( 
	   ColorResolutionCommandMode.InPlace, 
	   8, 
	   RasterByteOrder.Rgb, 
	   RasterDitheringMethod.FloydStein, 
	   ColorResolutionCommandPaletteFlags.UsePalette | ColorResolutionCommandPaletteFlags.FastMatch, 
	   colors); 
	command.Run(image); 
 
	// Free the user match table when it is no longer needed 
	userMatchTable.Unuse(); 
 
	// Save the image back to disk 
	codecs.Save(image, destFileName, RasterImageFormat.Bmp, 8); 
 
	// Clean up 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterUserMatchTable Class

RasterUserMatchTable Members

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Help Version 23.0.2024.2.29

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies