OffsetRegion Method

Summary

Moves the image region by the specified number of rows and columns.

Syntax

Objective-C

C++/CLI

Java

Python

public void OffsetRegion( 
   int rowOffset, 
   int colOffset 
)

- (BOOL)offsetRegionByAmount:(LeadPoint)offset  
                       error:(NSError **)error

public void offsetRegion( 
   int intValue,  
   int intValue2 
);

public: 
void OffsetRegion(  
   int rowOffset, 
   int colOffset 
)

def OffsetRegion(self,rowOffset,colOffset):

Parameters

rowOffset
The number of rows to move the region.

colOffset
The number of columns to move the region.

Remarks

The move does not affect the pixels in the region.

This method uses image coordinates to specify the pixel. Therefore, you must account for the view perspective of the image.

Example

Java

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 FlipRegionExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
   string destFileName1 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_OriginalRegion.bmp"); 
   string destFileName2 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_OffsetRegion.bmp"); 
   string destFileName3 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_FlipRegion.bmp"); 
   string destFileName4 = Path.Combine(LEAD_VARS.ImagesDir, "Image1_ReverseRegion.bmp"); 
 
   // Load the image 
   RasterImage image = codecs.Load(srcFileName); 
 
   // Add an ellipse inside a rectangle region to the image 
 
   LeadRect rc = new LeadRect(0, 0, image.Width / 3, image.Height / 6); 
   image.AddEllipseToRegion(null, rc, RasterRegionCombineMode.Set); 
 
   // Clone this image and run an image proccesing command on it 
   InvertCommand command = new InvertCommand(); 
 
   RasterImage imageWithRegion = image.Clone(); 
   command.Run(imageWithRegion); 
   codecs.Save(imageWithRegion, destFileName1, RasterImageFormat.Bmp, 24); 
   imageWithRegion.Dispose(); 
 
   // Offset the region 
   image.OffsetRegion(100, 50); 
   imageWithRegion = image.Clone(); 
   command.Run(imageWithRegion); 
   codecs.Save(imageWithRegion, destFileName2, RasterImageFormat.Bmp, 24); 
   imageWithRegion.Dispose(); 
 
   // Flip the region 
   image.FlipRegion(); 
   imageWithRegion = image.Clone(); 
   command.Run(imageWithRegion); 
   codecs.Save(imageWithRegion, destFileName3, RasterImageFormat.Bmp, 24); 
   imageWithRegion.Dispose(); 
 
   // Reverse the region 
   image.ReverseRegion(); 
   imageWithRegion = image.Clone(); 
   command.Run(imageWithRegion); 
   codecs.Save(imageWithRegion, destFileName4, RasterImageFormat.Bmp, 24); 
   imageWithRegion.Dispose(); 
 
   image.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.FileInputStream; 
import java.io.IOException; 
import java.io.InputStream; 
import java.util.ArrayList; 
import java.util.List; 
 
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.core.*; 
import leadtools.svg.*; 
import leadtools.imageprocessing.CloneCommand; 
import leadtools.imageprocessing.FillCommand; 
import leadtools.imageprocessing.FlipCommand; 
import leadtools.imageprocessing.GrayscaleCommand; 
import leadtools.imageprocessing.color.InvertCommand; 
import leadtools.imageprocessing.color.PosterizeCommand; 
 
 
public void flipRegionExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
   String destFileName1 = combine(LEAD_VARS_IMAGES_DIR, "Image1_OriginalRegion.bmp"); 
   String destFileName2 = combine(LEAD_VARS_IMAGES_DIR, "Image1_OffsetRegion.bmp"); 
   String destFileName3 = combine(LEAD_VARS_IMAGES_DIR, "Image1_FlipRegion.bmp"); 
   String destFileName4 = combine(LEAD_VARS_IMAGES_DIR, "Image1_ReverseRegion.bmp"); 
 
   // Load the image 
   RasterImage image = codecs.load(srcFileName); 
 
   // Add an ellipse inside a rectangle region to the image 
   LeadRect rc = new LeadRect(0, 0, image.getWidth() / 3, image.getHeight() / 6); 
   image.addEllipseToRegion(null, rc, RasterRegionCombineMode.SET); 
   assertTrue(rc.getWidth() == (image.getWidth() / 3)); 
 
   // Clone this image and run an image proccesing command on it 
   InvertCommand command = new InvertCommand(); 
   RasterImage imageWithRegion = image.clone(); 
   command.run(imageWithRegion); 
   codecs.save(imageWithRegion, destFileName1, RasterImageFormat.BMP, 24); 
   imageWithRegion.dispose(); 
 
   assertTrue("file unsuccessfully saved to " + destFileName1, (new File(destFileName1)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName1); 
 
   // Offset the region 
   image.offsetRegion(100, 50); 
   imageWithRegion = image.clone(); 
   command.run(imageWithRegion); 
   codecs.save(imageWithRegion, destFileName2, RasterImageFormat.BMP, 24); 
   imageWithRegion.dispose(); 
 
   assertTrue("file unsuccessfully saved to " + destFileName2, (new File(destFileName2)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName2); 
 
   // Flip the region 
   image.flipRegion(); 
   imageWithRegion = image.clone(); 
   command.run(imageWithRegion); 
   codecs.save(imageWithRegion, destFileName3, RasterImageFormat.BMP, 24); 
   imageWithRegion.dispose(); 
 
   assertTrue("file unsuccessfully saved to " + destFileName3, (new File(destFileName3)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName3); 
 
   // Reverse the region 
   image.reverseRegion(); 
   imageWithRegion = image.clone(); 
   command.run(imageWithRegion); 
   codecs.save(imageWithRegion, destFileName4, RasterImageFormat.BMP, 24); 
   imageWithRegion.dispose(); 
 
   assertTrue("file unsuccessfully saved to " + destFileName4, (new File(destFileName4)).exists()); 
   System.out.printf("File saved successfully to %s%n", destFileName4); 
 
   // Clean up 
   image.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 23.0.2024.5.22

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Leadtools Namespace

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