Converts a 12 or 16-bit grayscale image to an 8-bit grayscale or a 24-bit RGB image. This class is available in Medical toolkits only.
public class WindowLevelCommand : RasterCommand
Public Class WindowLevelCommand
Inherits RasterCommand
@interface LTWindowLevelCommand : LTRasterCommand
public class WindowLevelCommand extends RasterCommand
public ref class WindowLevelCommand : public RasterCommand
Only TIFF and DICOM file formats are capable of saving images that have been window-leveled. Images can be window-leveled by calling WindowLevel and specifying RasterWindowLevelMode.PaintAndProcessing for the flags parameter, by using the WindowLevelCommand or by loading an image from a file format that supports Window Leveling. If a window-leveled image is saved as any other file format, the image data will be converted before being saved. For more information, refer to Saving Window-Leveled Images. See WindowLevelExtCommand for a version of this class using 16-bit lookup tables. LEADTOOLS supports two types of LUTs for 10-16-bit grayscale images (8-bit LUT and 16-bit LUT). Typical grayscale image display and processing is done using an 8-bit LUT. But, you can also use a 16-bit LUT, which offers more precision. Some special video cards and monitors also support display of grayscale images using a 16-bit LUT. For more information, refer to Introduction to Image Processing With LEADTOOLS. For more information, refer to Grayscale Images.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
public void WindowLevelCommandExample()
{
// Load an image
RasterCodecs codecs = new RasterCodecs();
codecs.ThrowExceptionsOnInvalidImages = true;
RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm"));
// Prepare the command
int x;
byte y;
int Size;
RasterColor[] LookupTable;
//Change the image to 16-bit grayscale
GrayscaleCommand graycommand = new GrayscaleCommand(16);
MinMaxBitsCommand MinMaxBits = new MinMaxBitsCommand();
MinMaxValuesCommand MinMaxValues = new MinMaxValuesCommand();
WindowLevelCommand command = new WindowLevelCommand();
graycommand.Run(image);
MinMaxBits.Run(image);
MinMaxValues.Run(image);
Size = (1 << (MinMaxBits.MaximumBit - MinMaxBits.MinimumBit + 1));
LookupTable = new Leadtools.RasterColor[Size];
// fill the first half of the LookupTable with RED.
for (x = 0; x < Size / 2; x++)
LookupTable[x] = new Leadtools.RasterColor(255, 0, 0);
// fill the rest with gray values.
for (x = Size / 2; x < Size; x++)
{
y = (byte)((x - MinMaxValues.MinimumValue) * 255 / (MinMaxValues.MaximumValue - MinMaxValues.MinimumValue));
LookupTable[x] = new Leadtools.RasterColor(y, y, y);
}
command.HighBit = MinMaxBits.MaximumBit;
command.LowBit = MinMaxBits.MinimumBit;
command.LookupTable = LookupTable;
command.Order = Leadtools.RasterByteOrder.Bgr;
command.Run(image);
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\Users\Public\Documents\LEADTOOLS Images";
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Public Sub WindowLevelCommandExample()
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)
Dim command As WindowLevelCommand = New WindowLevelCommand
graycommand.Run(leadImage)
Dim minValue As Integer = leadImage.MinValue
Dim maxValue As Integer = leadImage.MaxValue
Dim minBit As Integer = leadImage.LowBit
Dim maxBit As Integer = leadImage.HighBit
Dim Size As Integer = (1 << (maxBit - minBit + 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 = Convert.ToByte((x - minValue) * 255 / (maxValue - minValue))
LookupTable(x) = New RasterColor(y, y, y)
Next
command.HighBit = maxBit
command.LowBit = minBit
command.LookupTable = LookupTable
command.Order = RasterByteOrder.Bgr
command.Run(leadImage)
End Sub
Public NotInheritable Class LEAD_VARS
Public Const ImagesDir As String = "C:\Users\Public\Documents\LEADTOOLS Images"
End Class
c#[Silverlight C# Example]
using Leadtools;
using Leadtools.Examples;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
public void WindowLevelCommandExample(RasterImage image, Stream outStream)
{
// Prepare the command
int x;
byte y;
int Size;
RasterColor[] LookupTable;
//Change the image to 16-bit grayscale
GrayscaleCommand graycommand = new GrayscaleCommand(16);
MinMaxBitsCommand MinMaxBits = new MinMaxBitsCommand();
MinMaxValuesCommand MinMaxValues = new MinMaxValuesCommand();
WindowLevelCommand command = new WindowLevelCommand();
graycommand.Run(image);
MinMaxBits.Run(image);
MinMaxValues.Run(image);
Size = (1 << (MinMaxBits.MaximumBit - MinMaxBits.MinimumBit + 1));
LookupTable = new Leadtools.RasterColor[Size];
// fill the first half of the LookupTable with RED.
for (x = 0; x < Size / 2; x++)
LookupTable[x] = new Leadtools.RasterColor(255, 0, 0);
// fill the rest with gray values.
for (x = Size / 2; x < Size; x++)
{
y = (byte)((x - MinMaxValues.MinimumValue) * 255 / (MinMaxValues.MaximumValue - MinMaxValues.MinimumValue));
LookupTable[x] = new Leadtools.RasterColor(y, y, y);
}
command.HighBit = MinMaxBits.MaximumBit;
command.LowBit = MinMaxBits.MinimumBit;
command.LookupTable = LookupTable;
command.Order = Leadtools.RasterByteOrder.Bgr;
command.Run(image);
// Save result image
RasterCodecs codecs = new RasterCodecs();
codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24);
image.Dispose();
}
vb[Silverlight VB Example]
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Public Sub WindowLevelCommandExample(ByVal image As RasterImage, ByVal outStream As Stream)
' Prepare the command
Dim x As Integer
Dim y As Byte
Dim Size As Integer
Dim LookupTable As RasterColor()
'Change the image to 16-bit grayscale
Dim graycommand As GrayscaleCommand = New GrayscaleCommand(16)
Dim MinMaxBits As MinMaxBitsCommand = New MinMaxBitsCommand()
Dim MinMaxValues As MinMaxValuesCommand = New MinMaxValuesCommand()
Dim command As WindowLevelCommand = New WindowLevelCommand()
graycommand.Run(image)
MinMaxBits.Run(image)
MinMaxValues.Run(image)
Size = (1 << (MinMaxBits.MaximumBit - MinMaxBits.MinimumBit + 1))
LookupTable = New RasterColor(Size - 1) {}
' fill the first half of the LookupTable with RED.
x = 0
Do While x < Size / 2
LookupTable(x) = New RasterColor(255, 0, 0)
x += 1
Loop
' fill the rest with gray values.
x = Size / 2
Do While x < Size
y = CByte((x - MinMaxValues.MinimumValue) * 255 / (MinMaxValues.MaximumValue - MinMaxValues.MinimumValue))
LookupTable(x) = New RasterColor(y, y, y)
x += 1
Loop
command.HighBit = MinMaxBits.MaximumBit
command.LowBit = MinMaxBits.MinimumBit
command.LookupTable = LookupTable
command.Order = RasterByteOrder.Bgr
command.Run(image)
' Save result image
Dim codecs As RasterCodecs = New RasterCodecs()
codecs.Save(image, outStream, RasterImageFormat.Jpeg, 24)
image.Dispose()
End Sub
Leadtools.ImageProcessing.Core Namespace
Introduction to Image Processing With LEADTOOLS
ApplyVoiLookupTableCommand Class
Leadtools.ImageProcessing.Color.ChannelMixerCommand
Leadtools.ImageProcessing.Effects.DeinterlaceCommand
Leadtools.ImageProcessing.Color.DesaturateCommand
Leadtools.ImageProcessing.Effects.EdgeDetectStatisticalCommand
Leadtools.ImageProcessing.Color.LightControlCommand
Leadtools.ImageProcessing.Effects.SmoothEdgesCommand
Leadtools.ImageProcessing.Color.LocalHistogramEqualizeCommand
Leadtools.ImageProcessing.Color.AddWeightedCommand
Leadtools.ImageProcessing.Color.ColorMergeCommand
Leadtools.ImageProcessing.Color.ColorSeparateCommand
Leadtools.ImageProcessing.Color.MultiplyCommand
Leadtools.ImageProcessing.Color.AutoColorLevelCommand
Leadtools.ImageProcessing.Color.ColorLevelCommand
Leadtools.ImageProcessing.Color.GrayScaleToDuotoneCommand
Leadtools.ImageProcessing.Color.GrayScaleToMultitoneCommand
Leadtools.ImageProcessing.Effects.RegionHolesRemovalCommand
Leadtools.ImageProcessing.Color.SelectiveColorCommand
Leadtools.ImageProcessing.Effects.SkeletonCommand
Leadtools.ImageProcessing.Color.ChangeHueSaturationIntensityCommand
Leadtools.ImageProcessing.Color.ColorReplaceCommand
Leadtools.ImageProcessing.Color.ColorThresholdCommand
Leadtools.ImageProcessing.Color.MathematicalFunctionCommand
Leadtools.ImageProcessing.Color.SegmentCommand
Leadtools.ImageProcessing.Color.AdaptiveContrastCommand
Leadtools.ImageProcessing.Color.ApplyMathematicalLogicCommand
Leadtools.ImageProcessing.Color.ColorIntensityBalanceCommand
Leadtools.ImageProcessing.Color.ContrastBrightnessIntensityCommand
Leadtools.ImageProcessing.Color.DynamicBinaryCommand
Leadtools.ImageProcessing.Effects.EdgeDetectEffectCommand
Leadtools.ImageProcessing.SpecialEffects.FunctionalLightCommand
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