WindowLevelCommand Constructor(int,int,RasterColor[],RasterByteOrder)

Summary

Initializes a new WindowLevelCommand class object with explicit parameters.

Syntax

Objective-C

C++

Java

public WindowLevelCommand( 
   int lowBit, 
   int highBit, 
   RasterColor[] lookupTable, 
   RasterByteOrder order 
)

Public Function New( _ 
   ByVal lowBit As Integer, _ 
   ByVal highBit As Integer, _ 
   ByVal lookupTable() As RasterColor, _ 
   ByVal order As RasterByteOrder _ 
)

- (instancetype)initWithLookupTable:(NSArray<LTRasterColor *> *)lookupTable 
                             lowBit:(NSInteger)lowBit 
                            highBit:(NSInteger)highBit 
                              order:(LTRasterByteOrder)order

public WindowLevelCommand( 
   int lowBit,  
   int highBit,  
   RasterColor[] lookupTable,  
   RasterByteOrder order 
)

public: 
WindowLevelCommand(  
   int lowBit, 
   int highBit, 
   array<RasterColor>^ lookupTable, 
   RasterByteOrder order 
)

Parameters

lowBit
Value indicating the low bit used for leveling. 0 <= lowBit <= highBit <= (11 for 12-bit grayscale or 15 for 16-bit grayscale).

highBit
Value indicating the high bit used for leveling. 0 <= lowBit <= highBit <= (11 for 12-bit grayscale or 15 for 16-bit grayscale).

lookupTable
Optional 8-bit lookup table that can be used to implement a user defined conversion. For every intensity value between 0 and 2 raised to the power of (highBit - lowBit + 1) - 1 there should be a corresponding entry in the lookup table that contains an RGB quad. If lookupTable is null, the conversion is a normal shift (right or left) and the output image is 8-bit grayscale. If lookupTable is not null, the output image is a 24-bit image.

order
Value indicating the color order if the output image will be 24-bit. If LookupTable is null, this parameter is ignored.

Example

Run the WindowLevelCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
 
public void WindowLevelConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")); 
 
   // Prepare the command 
   //Change the image to 16-bit grayscale 
   GrayscaleCommand graycommand = new GrayscaleCommand(16); 
   graycommand.Run(image); 
 
   MinMaxBitsCommand MinMaxBits = new MinMaxBitsCommand(); 
   MinMaxBits.Run(image); 
 
   MinMaxValuesCommand MinMaxValues = new MinMaxValuesCommand(); 
   MinMaxValues.Run(image); 
 
   int Size = (1 << (MinMaxBits.MaximumBit - MinMaxBits.MinimumBit + 1)); 
   RasterColor[] LookupTable = new RasterColor[Size]; 
 
   // fill the first half of the LookupTable with RED. 
   for (int x = 0; x < Size / 2; x++) 
      LookupTable[x] = new RasterColor(255, 0, 0); 
 
   // fill the rest with gray values. 
   for (int x = Size / 2; x < Size; x++) 
   { 
      byte y = (byte)((x - MinMaxValues.MinimumValue) * 255 / (MinMaxValues.MaximumValue - MinMaxValues.MinimumValue)); 
      LookupTable[x] = new RasterColor(y, y, y); 
   } 
 
   WindowLevelCommand command = new WindowLevelCommand(MinMaxBits.MinimumBit, MinMaxBits.MaximumBit, LookupTable, RasterByteOrder.Bgr); 
 
   command.Run(image); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub WindowLevelConstructorExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")) 
 
   ' Prepare the command 
   'Change the image to 16-bit grayscale 
   Dim graycommand As GrayscaleCommand = New GrayscaleCommand(16) 
   graycommand.Run(leadImage) 
 
   Dim MinMaxBits As MinMaxBitsCommand = New MinMaxBitsCommand 
   MinMaxBits.Run(leadImage) 
 
   Dim MinMaxValues As MinMaxValuesCommand = New MinMaxValuesCommand 
   MinMaxValues.Run(leadImage) 
 
   Dim Size As Integer = (1 << (MinMaxBits.MaximumBit - MinMaxBits.MinimumBit + 1)) 
   Dim LookupTable() As RasterColor 
   ReDim LookupTable(Size - 1) 
   ' fill the first half of the LookupTable with RED. 
   Dim x As Integer 
   For x = 0 To (Size \ 2 - 1) 
      LookupTable(x) = New RasterColor(255, 0, 0) 
   Next 
   ' fill the rest with gray values. 
   For x = Size \ 2 To Size - 1 
      Dim y As Byte = CType((x) * 255 / (Size), Byte) 
      LookupTable(x) = New RasterColor(y, y, y) 
   Next 
 
   Dim command As WindowLevelCommand = New WindowLevelCommand(MinMaxBits.MinimumBit, MinMaxBits.MaximumBit, LookupTable, RasterByteOrder.Bgr) 
   command.Run(leadImage) 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class

Requirements

Target Platforms

Reference

WindowLevelCommand Class

WindowLevelCommand Members

Overload List

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Leadtools.ImageProcessing.Core Assembly

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