RegionThreshold Property

Summary

Gets or sets the value that specifies the stopping point for the region.

Syntax

C++/CLI

Python

public int RegionThreshold { get; set; }

public: 
property int RegionThreshold { 
   int get(); 
   void set (    int ); 
}

RegionThreshold # get and set (KaufmannRegionCommand)

Property Value

The stopping point for the region.

Remarks

The region is created using a magic wand technique. The Magic Wand is a selection tool that works by starting from a point and expanding to different areas of the image. If the difference between the color of the new pixel which is about to be included in the region and the pixel color which is pointed to by RegionStart exceeds the difference between the RegionThreshold and the pixel color which is pointed to by RegionStart, the pixel will not be included. For more information, refer to AddMagicWandToRegion Method.

Example

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void KaufmannRegionCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Image3.dcm")); 
 
   // Prepare the command 
   LeadPoint startPoint = new LeadPoint((image.Width / 2), (image.Height / 2)); 
 
   // apply the command in order to get the pixels count of the first region. 
   KaufmannRegionCommand KaufmannCommandInner = new KaufmannRegionCommand(); 
   KaufmannCommandInner.CombineMode = RasterRegionCombineMode.Set; 
   KaufmannCommandInner.MaximumInput = 110; 
   KaufmannCommandInner.MinimumInput = 54; 
   KaufmannCommandInner.Radius = 21; 
   KaufmannCommandInner.RegionStart = startPoint; 
   KaufmannCommandInner.RegionThreshold = 13; 
   KaufmannCommandInner.RemoveHoles = true; 
   KaufmannCommandInner.Run(image); 
 
   int firstPixelCount = KaufmannCommandInner.PixelsCount; 
 
   // apply the command once more. 
   KaufmannRegionCommand KaufmannCommandOuter = new KaufmannRegionCommand(29, 51, 229, 207, startPoint, true, RasterRegionCombineMode.Set); 
   KaufmannCommandOuter.Run(image); 
 
   int secondPixelCount = KaufmannCommandOuter.PixelsCount; 
 
   // print the ratio between the first and the second region. 
   double result = (firstPixelCount * 1.0 / secondPixelCount); 
   MessageBox.Show(result.ToString()); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

KaufmannRegionCommand Class

KaufmannRegionCommand Members

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Help Version 22.0.2023.11.1

Leadtools.ImageProcessing.Core Assembly

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