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

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:\LEADTOOLS22\Resources\Images"; 
}