- lookupTable
- 8-bit lookup table array to be filled by this method.
- type
- Flag that indicates whether the LookupTable contains signed or unsigned data.
Visual Basic (Declaration) | |
---|---|
Public Shared Function CountLookupTableColors( _ ByVal lookupTable() As RasterColor, _ ByVal type As CountLookupTableColorsType _ ) As CountLookupTableColorsResult |
Visual Basic (Usage) | Copy Code |
---|---|
Dim lookupTable() As RasterColor Dim type As CountLookupTableColorsType Dim value As CountLookupTableColorsResult value = CoreUtilities.CountLookupTableColors(lookupTable, type) |
C# | |
---|---|
public static CountLookupTableColorsResult CountLookupTableColors( RasterColor[] lookupTable, CountLookupTableColorsType type ) |
C++/CLI | |
---|---|
public: static CountLookupTableColorsResult CountLookupTableColors( array<RasterColor>^ lookupTable, CountLookupTableColorsType type ) |
Parameters
- lookupTable
- 8-bit lookup table array to be filled by this method.
- type
- Flag that indicates whether the LookupTable contains signed or unsigned data.
Run the CountLookupTableColors method to get the number of entries and start index from the image.
Visual Basic | Copy Code |
---|---|
Public Sub CountLookupTableColorsExample() Dim codecs As New RasterCodecs() codecs.ThrowExceptionsOnInvalidImages = True Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")) ' Prepare the command Dim command As CountLookupTableColorsResult = CoreUtilities.CountLookupTableColors(leadImage.GetLookupTable, CountLookupTableColorsType.Signed) MessageBox.Show("First Index = " + command.FirstIndex.ToString + Chr(13) + "Number Of Entries = " + command.NumberOfEntries.ToString) End Sub Public NotInheritable Class LEAD_VARS Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images" End Class |
C# | Copy Code |
---|---|
public void CountLookupTableColorsExample() { // Load an image RasterCodecs codecs = new RasterCodecs(); codecs.ThrowExceptionsOnInvalidImages = true; RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")); // Prepare the command CountLookupTableColorsResult command = CoreUtilities.CountLookupTableColors(image.GetLookupTable(), CountLookupTableColorsType.Signed); MessageBox.Show("First Index = " + command.FirstIndex + "\n" + "Number Of Entries = " + command.NumberOfEntries); } static class LEAD_VARS { public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images"; } |
SilverlightCSharp | Copy Code |
---|---|
public void CountLookupTableColorsExample(RasterImage image) { // Prepare the command CountLookupTableColorsResult command = CoreUtilities.CountLookupTableColors(image.GetLookupTable(), CountLookupTableColorsType.Signed); Debug.WriteLine("First Index = " + command.FirstIndex + "\n" + "Number Of Entries = " + command.NumberOfEntries); image.Dispose(); } |
SilverlightVB | Copy Code |
---|---|
Public Sub CountLookupTableColorsExample(ByVal image As RasterImage) ' Prepare the command Dim command As CountLookupTableColorsResult = CoreUtilities.CountLookupTableColors(image.GetLookupTable(), CountLookupTableColorsType.Signed) Debug.WriteLine("First Index = " & command.FirstIndex + Constants.vbLf & "Number Of Entries = " & command.NumberOfEntries) image.Dispose() End Sub |
- Suppose you have a LookupTable with 4096 colors, the first 200 colors are black and the last 30 are white, the rest of the colors between black and white are gray. This is what the method will provide :
NumberOfEntries (property of CountLookupTableColorsResult) : 3868.
FirstIndex (property of CountLookupTableColorsResult) : 199. - In more detail this is:
Total number of entries: 4096 (0 - 4095).
First index of the end color: 4095 - 30 + 1 (+1 to add the first index of the end color to the range).
Number of occurrences of the starting color: 200 (0 - 199).
The last index of the start color: 199.
Total number of entries: (4095 - 30 + 1) - 199 + 1. - This method supports 12 and 16-bit grayscale images. Support for 12 and 16-bit grayscale images is available only in the Document/Medical toolkits.
- This method uses 8-bit lookup tables. See CountLookupTableColorsExt for a method that uses 16-bit lookup tables.
Target Platforms: Silverlight 3.0, Windows XP, Windows Server 2003 family, Windows Server 2008 family, Windows Vista, Windows 7, MAC OS/X (Intel Only)
Reference
CoreUtilities ClassCoreUtilities Members
CountLookupTableColorsExt Method
Detecting Registration Marks
WindowLevelCommand Class
Leadtools.RasterPalette.WindowLevelFillLookupTable(Leadtools.RasterColor[],Leadtools.RasterColor,Leadtools.RasterColor,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,System.Int32,Leadtools.RasterPaletteWindowLevelFlags)
Leadtools.ImageProcessing.Effects.EffectsUtilities.GetUserLookupTable(System.Int32[],Leadtools.LeadPoint[])
Leadtools.ImageProcessing.Color.RemapIntensityCommand
ApplyLinearVoiLookupTableCommand Class