CalculateRegionArea Method

Summary

Gets the total number of pixels in the image region.

Syntax

Objective-C

C++/CLI

Java

Python

public long CalculateRegionArea()

@property (nonatomic, assign, readonly) unsigned long regionArea

public long calculateRegionArea();

public: 
int64 CalculateRegionArea();

def CalculateRegionArea(self):

Return Value

The pixel count.

Remarks

For more information, refer to Working with the Existing Region.

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 CalculateRegionAreaExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
 
   string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp"); 
 
   // Load the image 
   RasterImage image = codecs.Load(srcFileName); 
 
   // Add a region to the image 
   LeadRect rc = new LeadRect(image.Width / 3, image.Height / 3, image.Width / 3, image.Height / 3); 
   image.AddEllipseToRegion(null, rc, RasterRegionCombineMode.Set); 
 
   // Get the number of pixels in the region 
   long area = image.CalculateRegionArea(); 
   Console.WriteLine("Number of pixels in region after a region is added: {0}", area); 
 
   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 calculateRegionAreaExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
   RasterCodecs codecs = new RasterCodecs(); 
   String srcFileName = combine(LEAD_VARS_IMAGES_DIR, "Image1.cmp"); 
 
   // Load the image 
   RasterImage image = codecs.load(srcFileName); 
 
   // Add a region to the image 
   LeadRect rc = new LeadRect(image.getWidth() / 3, image.getHeight() / 3, image.getWidth() / 3, 
         image.getHeight() / 3); 
   image.addEllipseToRegion(null, rc, RasterRegionCombineMode.SET); 
   assertTrue("Region added unsuccessfully", image.hasRegion()); 
 
   // Get the number of pixels in the region 
   long area = image.calculateRegionArea(); 
   System.out.printf("Number of pixels in region after a region is added: %s%n", area); 
 
   image.dispose(); 
   codecs.dispose(); 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 23.0.2024.2.29

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies