LowerThreshold Property

Summary
Gets or sets the low threshold value.
Syntax
C#
C++/CLI
public float LowerThreshold { get; set; } 
public: 
property float LowerThreshold { 
   float get(); 
   void set (    float ); 
} 

Property Value

Value that indicates the lower threshold value. This value must not exceed the UpperThreshold value. The default value is 0.

Remarks

The thresholding (or binary segmentation) feature allows you to remove a certain density from a 3D object by specifying an interval (which is between LowerThreshold and UpperThreshold). Any value outside this interval will not be rendered.

You can flip this by removing the value inside the interval and keeping the outside values. For more information, refer to the RemoveInterval property.

Example
C#
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.MedicalViewer; 
using Leadtools.Medical3D; 
 
public void Medical3DControlExample() 
{ 
   Medical3DLoadDICOMSeriesExamples LoadObject = new Medical3DLoadDICOMSeriesExamples(); 
   MedicalViewerSeriesManager output = LoadObject.LoadJamesHead(); 
 
   MainForm1 form = new MainForm1(output); 
   form.ShowDialog(); 
} 
 
// MainForm1 will be the owner of the medical viewer control. 
class MainForm1 : Form 
{ 
   private Medical3DControl _medical3DControl; 
 
   public MainForm1(MedicalViewerSeriesManager output) 
   { 
      RasterCodecs _codecs = new RasterCodecs(); 
      RasterImage _image; 
 
      CodecsImageInfo codecsInformation; 
 
      _medical3DControl = new Medical3DControl(); 
      this.SizeChanged += new EventHandler(MainForm1_SizeChanged); 
      this.FormClosing += new FormClosingEventHandler(MainForm1_FormClosing); 
 
 
      _medical3DControl.ObjectsContainer.Objects.Add(new Medical3DObject()); 
 
      int index; 
 
      codecsInformation = _codecs.GetInformation((string)output.Stacks[0].Items[0].Data, true); 
 
 
      int width = codecsInformation.Width; 
      int height = codecsInformation.Height; 
      int depth = 256; 
 
      _medical3DControl.ObjectsContainer.Objects[0].MemoryEfficientInit(depth); 
 
      for (index = 0; index < depth; index++) 
      { 
 
         _image = _codecs.Load((string)output.Stacks[0].Items[index].Data, 0, CodecsLoadByteOrder.BgrOrGrayOrRomm, 1, 1); 
         _medical3DControl.ObjectsContainer.Objects[0].MemoryEfficientSetFrame(_image, index, output.Stacks[0].Items[index].ImagePosition, true); 
      } 
 
      string spearator = ("\\"); 
      string[] test = output.Stacks[0].Items[0].ImageOrientation.Split(spearator.ToCharArray()); 
      float[] orientation = new float[6]; 
      int i; 
      for (i = 0; i < 6; i++) 
      { 
         orientation[i] = (float)Convert.ToDouble(test[i]); 
      } 
 
      _medical3DControl.ObjectsContainer.Objects[0].MemoryEfficientEnd(orientation, output.Stacks[0].PixelSpacing); 
 
      int MinimumDensityValue = _medical3DControl.ObjectsContainer.Objects[0].MinimumValue; 
      int MaximumDensityValue = _medical3DControl.ObjectsContainer.Objects[0].MaximumValue; 
 
      _medical3DControl.ObjectsContainer.Objects[0].UpperThreshold = MaximumDensityValue / 2.5f; 
      _medical3DControl.ObjectsContainer.Objects[0].LowerThreshold = MinimumDensityValue; 
      _medical3DControl.ObjectsContainer.Objects[0].RemoveInterval = Medical3DRemoveIntervalType.InnerRange; 
      _medical3DControl.ObjectsContainer.Objects[0].EnableThresholding = true; 
 
      _medical3DControl.AddAction(MedicalViewerActionType.Rotate3DObject); 
      _medical3DControl.SetAction(MedicalViewerActionType.Rotate3DObject, MedicalViewerMouseButtons.Left, MedicalViewerActionFlags.Active); 
 
      Controls.Add(_medical3DControl); 
   } 
 
   void MainForm1_FormClosing(object sender, FormClosingEventArgs e) 
   { 
      _medical3DControl.Dispose(); 
   } 
 
 
   void MainForm1_SizeChanged(object sender, EventArgs e) 
   { 
      if (_medical3DControl != null) 
         _medical3DControl.Size = new Size(this.ClientRectangle.Right, this.ClientRectangle.Bottom); 
   } 
} 
Requirements

Target Platforms

Help Version 22.0.2023.1.24
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.Medical3D Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.