Public Shared Function GetUserLookupTable( _
   ByVal lookupTable() As Integer, _
   ByVal userPoints() As Point _
) As Integer

Visual Basic (Usage)	Copy Code
Dim lookupTable() As Integer Dim userPoints() As Point Dim value As Integer   value = EffectsUtilities.GetUserLookupTable(lookupTable, userPoints)

public static int GetUserLookupTable( 
   int[] lookupTable,
   Point[] userPoints
)

public:
static int GetUserLookupTable( 
   array<int>^ lookupTable,
   array<Point>^ userPoints
) 

Parameters

lookupTable

Lookup table array to be filled by this method.

userPoints

Array of Point structures that contain the points on the curve used to update the lookup table.

Return Value

This example will brighten the loaded bitmap using the lookup table updated by the GetUserLookupTable method.

Visual Basic

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Public Sub GetUserLookupTableExample()    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    Dim LookupTable() As Integer    ReDim LookupTable(255)    Dim UserPoint() As Point    ReDim UserPoint(2)    UserPoint(0) = New Point(0, 0)    UserPoint(1) = New Point(128, 150)    UserPoint(2) = New Point(255, 255)    'Get Lookup table where the array effected by user data method.    EffectsUtilities.GetUserLookupTable(LookupTable, UserPoint)    Dim command As RemapIntensityCommand = New RemapIntensityCommand    command.Flags = RemapIntensityCommandFlags.Master    command.LookupTable = LookupTable    command.Run(leadImage)    codecs.Save(leadImage, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24)    RasterCodecs.Shutdown() End Sub

C#

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public void GetUserLookupTableExample()  {     // 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     int[] LookupTable = new int[256];     Point[] UserPoint = new Point[3];     UserPoint[0] = new Point(0, 0);     UserPoint[1] = new Point(128,150);     UserPoint[2] = new Point(255,255);       //Get Lookup table where the array effected by user data method.     EffectsUtilities.GetUserLookupTable(LookupTable, UserPoint);     RemapIntensityCommand command = new RemapIntensityCommand();     command.Flags = RemapIntensityCommandFlags.Master;     command.LookupTable = LookupTable;     command.Run(image);     codecs.Save(image, LeadtoolsExamples.Common.ImagesPath.Path + "Result.jpg", RasterImageFormat.Jpeg, 24);       RasterCodecs.Shutdown();  }

• This method will update the lookup table array using the best curve that passes through the points specified in the userPoint array. The points in the array do not need to be sorted. In most cases, this method is used with the RemapIntensityCommand method.
• The length of the lookup table array depends upon the number of bits being used, as follows:
  

  Value	Meaning
  65536	16-bit / sample image
  4096	12-bit / sample image
  256	256 8-bit / sample image

  
  

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