SetTransferFunction(IEnumerable<KeyValuePair<Int32,Color>>) Method

In This Topic

Set the transfer function for VR from a dictionary of pixel value to Colour lookups

Syntax

Visual Basic
C#

'Declaration
 
Public Overloads Sub SetTransferFunction( _
   ByVal ColourList As System.Collections.Generic.IEnumerable(Of KeyValuePair(Of Integer,Color)) _
)

public void SetTransferFunction( 
   System.Collections.Generic.IEnumerable<KeyValuePair<int,Color>> ColourList
)

Parameters

ColourList: The list of pixel values and associated colours

Remarks

DicomObjects will interpolate between adjacent values, and create a linearised lookup table, which is then passed (alongside the minimum and maximum pixel values to the other override of SetTransferFunction. This method is therefore a "convenience" method to simplify such updates.

Example

DicomImage image = new DicomImage("your_3D_dicom_image.dcm");
DicomVolume volume = new DicomVolume(image);
                    
RenderMode3D renderMode = RenderMode3D.VR;
DicomImage3D image3D = new DicomImage3D(volume, renderMode);
               
Dictionary<int, Color> transferFunction = new Dictionary<int, Color>
{
     { 0, Color.Black },        // Lowest intensity → Black (fully transparent)
     { 50, Color.DarkBlue },    // Low intensity → Dark Blue
     { 100, Color.Blue },       // Mid intensity → Blue
     { 150, Color.Green },      // High-mid intensity → Green
     { 200, Color.Yellow },     // High intensity → Yellow
     { 255, Color.Red }         // Highest intensity → Red (Opaque)
};     
            
image3D.SetTransferFunction(transferFunction);
Viewer.Images.Add(image3D);

Requirements

Target Platforms: .NET CLR 4.8 or higher

Reference

DicomImage3D Class
DicomImage3D Members
Overload List

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