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ResizeCommand Class

Summary
Resizes the image from an existing image, and puts the resized image into a destination image, leaving the original image intact.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public class ResizeCommand : RasterCommand 
@interface LTResizeCommand : LTRasterCommand 
public class ResizeCommand extends RasterCommand 
public ref class ResizeCommand : public RasterCommand   
class ResizeCommand(RasterCommand): 
Remarks

The ResizeCommand command works by resizing the image data passed to the Run method into the image passed to the DestinationImage property.

The destination image must be initialized with the correct RasterImage.Width and RasterImage.Height of the new, resized image.

This command does not change the source image passed to the Run method. If you want to resize an image without creating a new version, use the SizeCommand.

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

Example

This example will load an image and then resize it into an existing, smaller image.

C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
 
 
public void ResizeCommandExample() 
{ 
	RasterCodecs codecs = new RasterCodecs(); 
 
	string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
	string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "ResizeCommand.bmp"); 
 
	// Load the source image from disk 
	RasterImage srcImage = codecs.Load(srcFileName); 
 
	// Create the destination image 
	RasterImage destImage = new RasterImage( 
	   RasterMemoryFlags.Conventional, 
	   100, 
	   100, 
	   srcImage.BitsPerPixel, 
	   srcImage.Order, 
	   srcImage.ViewPerspective, 
	   srcImage.GetPalette(), 
	   IntPtr.Zero, 
	   0); 
 
	// Resize the source image into the destination image 
	ResizeCommand command = new ResizeCommand(); 
	command.DestinationImage = destImage; 
	command.Flags = RasterSizeFlags.Bicubic; 
	command.Run(srcImage); 
 
	// Save it to disk 
	codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 24); 
 
	// Clean Up 
	srcImage.Dispose(); 
	destImage.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 resizeCommandExample() { 
   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, "ResizeCommand.bmp"); 
 
   // Load the source image from disk 
   RasterImage srcImage = codecs.load(srcFileName); 
 
   // Create the destination image 
   byte[] userData = new byte[0]; 
   RasterImage destImage = new RasterImage(RasterMemoryFlags.CONVENTIONAL.getValue(), 100, 100, 
         srcImage.getBitsPerPixel(), srcImage.getOrder(), srcImage.getViewPerspective(), srcImage.getPalette(), 
         userData, 0); 
 
   // Resize the source image into the destination image 
   ResizeCommand command = new ResizeCommand(); 
   command.setDestinationImage(destImage); 
   command.setFlags(RasterSizeFlags.BICUBIC); 
   command.run(srcImage); 
 
   // Save it to disk 
   codecs.save(destImage, 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 
   srcImage.dispose(); 
   destImage.dispose(); 
   codecs.dispose(); 
} 
Requirements

Target Platforms

Help Version 23.0.2024.5.22
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.