FeretsDiameterCommand Class

Summary

Computes the Feret's diameter of an object (the maximum distance between the points of the perimeter of the region), and finds its end points.

Syntax

C++/CLI

Python

public class FeretsDiameterCommand

public ref class FeretsDiameterCommand

class FeretsDiameterCommand:

Remarks

This command calculates the Feret's Diameter (caliper length), the longest distance between any two points along the boundary. This is equivalent to the minimum diameter of a tube through which this object can pass.
This command does not support signed data images.

Example

Run the FeretsDiameterCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Effects; 
 
 
public void FeretsDiameterCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"Cannon.jpg")); 
 
   // Prepare the command 
   LeadRect rcRect = new LeadRect(image.Width / 4, image.Height / 4, image.Width * 3 / 4, image.Height * 3 / 4); 
   image.AddEllipseToRegion(null, rcRect, RasterRegionCombineMode.Set); 
 
   RegionContourPointsCommand contourcommand = new RegionContourPointsCommand(null); 
   if (contourcommand != null) 
      contourcommand.Run(image); 
 
   FeretsDiameterCommand command = new FeretsDiameterCommand(contourcommand.Points); 
   command.Run(); 
 
   MessageBox.Show(string.Format("Results\nFirstIndex : {0}\nSecondIndex: {1}\nDiameter : {2}", command.FirstIndex, command.SecondIndex, command.FeretsDiameter), "Ferets Diameter Test Results"); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}