ObjectCounterCommand Class

Summary

Gets the number of black objects in a binary image.

Syntax

C++/CLI

Python

public class ObjectCounterCommand : RasterCommand

public ref class ObjectCounterCommand : public RasterCommand

class ObjectCounterCommand(RasterCommand):

Remarks

This command retrieves the number of black objects on a white background in a binary image. The behavior of this command can be further modified by using an Event Handler that handles the ObjectCounterCommandEventArgs.
This command works only on 1-bit black and white images.
If a region is selected, only the selected region will be changed by this command. If no region selected, the entire image will be processed.
This command does not support signed data images.

Example

Runs the ObjectCounterCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
 
public void ObjectCounterCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"Black-White-Objects-1BitPP.tif")); 
 
   // Prepare the command 
   ObjectCounterCommand command = new ObjectCounterCommand(); 
   command.ObjectCounter += new EventHandler<ObjectCounterCommandEventArgs>(ObjectCounterEvent_S1); 
   command.Run(image); 
 
   Debug.WriteLine("ObjectCountis" + "( " + command.Count + " )"); 
 
} 
 
private void ObjectCounterEvent_S1(object sender, ObjectCounterCommandEventArgs e) 
{ 
   int RegionPixelSize; 
   RegionPixelSize = 0; 
 
   for (int i = e.ObjectRectangle.Left; i < e.ObjectRectangle.Right; i++) 
   { 
      for (int j = e.ObjectRectangle.Top; j < e.ObjectRectangle.Bottom; j++) 
      { 
         if (e.ObjectData[i - e.ObjectRectangle.Left][j - e.ObjectRectangle.Top] == 1) 
         { 
            RegionPixelSize++; 
         } 
      } 
   } 
 
   Debug.WriteLine("Region size in pixels is" + "( " + RegionPixelSize + " )"); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

ObjectCounterCommand Members

Leadtools.ImageProcessing.Core Namespace

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Help Version 22.0.2023.11.1

Leadtools.ImageProcessing.Core Assembly

Introduction

Getting Started

Namespaces

Leadtools.ImageProcessing.Core Namespace

Assemblies