RasterCommand Class

Summary

The RasterCommand class is the base class for all LEADTOOLS image processing commands.

Syntax

Objective-C

C++/CLI

Java

Python

public abstract class RasterCommand

@interface LTRasterCommand : NSObject

public abstract class RasterCommand

public ref class RasterCommand abstract

class RasterCommand:

Remarks

The RasterCommand class is the base class for all LEADTOOLS image processing commands.

This class contains functionality for dealing with running an image processing command, including progress status of the command.

Example

This example runs two image processing commands on an image showing the progress percentage.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void RasterCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string rotatedFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_rotated.bmp"); 
	string flippedFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_flipped.bmp"); 
 
	// Load the source image from disk 
	RasterImage image = codecs.Load(srcFileName); 
 
	// flip the image 
	FlipCommand flip = new FlipCommand(false); 
	RunCommand(image, flip); 
 
	// save the image 
	codecs.Save(image, flippedFileName, RasterImageFormat.Bmp, 24); 
 
	// rotate the image by 45 degrees 
	RotateCommand rotate = new RotateCommand(); 
	rotate.Angle = 45 * 100; 
	rotate.FillColor = RasterColor.FromKnownColor(RasterKnownColor.White); 
	rotate.Flags = RotateCommandFlags.Resize; 
	RunCommand(image, rotate); 
 
	// save the image 
	codecs.Save(image, rotatedFileName, RasterImageFormat.Bmp, 24); 
 
	// clean up 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
bool cancelAt50; 
 
void RunCommand(RasterImage image, RasterCommand command) 
{ 
	// subscribe to the progress event of the command 
	command.Progress += new EventHandler<RasterCommandProgressEventArgs>(command_Progress); 
 
	// if this is a flip command, we want to stop at 50 percent 
	cancelAt50 = command is FlipCommand; 
 
	// run the command 
	command.Run(image); 
 
	command.Progress -= new EventHandler<RasterCommandProgressEventArgs>(command_Progress); 
} 
 
void command_Progress(object sender, RasterCommandProgressEventArgs e) 
{ 
	// show the percentage 
	Console.WriteLine(e.Percent); 
 
	// check if we need to cancel the command at 50% 
	if (e.Percent == 50 && cancelAt50) 
		e.Cancel = true; 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterCommand Members

Leadtools.ImageProcessing Namespace

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Help Version 22.0.2023.5.16

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies