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

Visual Basic (Usage)	Copy Code
Dim lowBit As Integer Dim highBit As Integer Dim lookupTable() As RasterColor Dim order As RasterByteOrder   Dim instance As WindowLevelCommand(lowBit, highBit, lookupTable, 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.

Run the WindowLevelCommand on an image.

Visual Basic

Copy Code

Public Sub WindowLevelConstructorExample()    RasterCodecs.Startup()    Dim codecs As New RasterCodecs()    codecs.ThrowExceptionsOnInvalidImages = True    Dim leadImage As RasterImage = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg")    ' 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)    RasterCodecs.Shutdown() End Sub

C#

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public void WindowLevelConstructorExample()  {     // Load an image     RasterCodecs.Startup();     RasterCodecs codecs = new RasterCodecs();     codecs.ThrowExceptionsOnInvalidImages = true;       RasterImage image = codecs.Load(LeadtoolsExamples.Common.ImagesPath.Path + "Master.jpg");       // 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);       RasterCodecs.Shutdown();  }

Target Platforms: Microsoft .NET Framework 2.0, Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family

Reference