CropCommand Class

Summary

Crops the image, resulting in an image that is the size of the specified rectangle.

Syntax

Objective-C

C++/CLI

Java

Python

public class CropCommand : RasterCommand

@interface LTCropCommand : LTRasterCommand

public class CropCommand extends RasterCommand

public ref class CropCommand : public RasterCommand

class CropCommand(RasterCommand):

Remarks

If a region is defined for the image, the region is also cropped if necessary.

For more information, refer to Introduction to Image Processing With LEADTOOLS.

Example

This example trims 100 pixels off of each side of an image.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void CropCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "CropCommand.bmp"); 
 
	// Load the source image from disk 
	RasterImage image = codecs.Load(srcFileName); 
 
	// Crop 100 pixels from each side of the image 
	CropCommand command = new CropCommand(); 
	command.Rectangle = new LeadRect( 
	   100, 
	   100, 
	   image.Width - 100, 
	   image.Height - 100); 
	command.Run(image); 
 
	// Save it to disk 
	codecs.Save(image, destFileName, RasterImageFormat.Bmp, 24); 
 
	// Clean Up 
	image.Dispose(); 
	codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.*; 
 
 
public void cropCommandExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "rgsref.cmp"); 
   String destFileName = combine(LEAD_VARS_IMAGES_DIR, "CropCommand.bmp"); 
 
   // Load the source image from disk 
   RasterImage image = codecs.load(srcFileName); 
 
   // Crop 100 pixels from each side of the image 
   CropCommand command = new CropCommand(); 
   command.setRectangle(new LeadRect( 
         100, 
         100, 
         image.getWidth() - 100, 
         image.getHeight() - 100)); 
   command.run(image); 
 
   // Save it to disk 
   codecs.save(image, destFileName, RasterImageFormat.BMP, 24); 
   assertTrue("file unsuccessfully saved to " + destFileName, (new File(destFileName)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName); 
 
   // Clean Up 
   image.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

CropCommand Members

Leadtools.ImageProcessing Namespace

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Help Version 23.0.2024.5.22

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies