public void SetLookupTable(
RasterColor[] value
)
Public Sub SetLookupTable( _
ByVal value() As RasterColor _
)
- (BOOL)setLookupTable:(nullable NSArray<LTRasterColor *> *)lut error:(NSError **)error
public void setLookupTable(RasterColor[] value)
public:
void SetLookupTable(
array<RasterColor>^ value
)
value
An array of RasterColor structures which represent the lookup table (LUT) of this RasterImage.
The lookup table (LUT) is used when the value of UseLookupTable is set to true.
The 8-bit and 16-bit lookup tables are synchronized, so when you change one, the other is changed as well The 16-bit lookup table (SetLookupTable16) has more precision so it is recommended you use the 16-bit LUT instead of the 8-bit LUT.
LUT is only used for 10-16 bit extended grayscale image or 10-16 bit palette color image. To update the palette in 1-8 bit image use SetPalette. For more information, refer to Grayscale Images.
LUT is also used for displaying extended Palette color image such as bit stored is 16-bit and LUT contains color value. This is typical of Ultra Sound image.
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Dicom;
using Leadtools.Drawing;
using Leadtools.Controls;
using LeadtoolsExamples.Common;
using Leadtools.Svg;
public void SetLookupTable()
{
DicomEngine.Startup();
// Create a RasterCodecs class for saving out images
RasterCodecs codecs = new RasterCodecs();
// Load a dataset
DicomDataSet ds = new DicomDataSet();
ds.Load(Path.Combine(ImagesPath.Path, "IMAGE3.dcm"), DicomDataSetLoadFlags.None);
// Get the image but do NOT auto-apply any of the LUTs
DicomElement element = ds.FindFirstElement(null, DicomTag.PixelData, true);
RasterImage image = ds.GetImage(element, 0, 16, RasterByteOrder.Gray, DicomGetImageFlags.None);
image.UseLookupTable = true;
// Save out the image without any LUTs applied. It should be black
codecs.Save(image, Path.Combine(ImagesPath.Path, "BeforeSetLookupTable.bmp"), RasterImageFormat.Bmp, 8);
// Create a LUT
RasterColor[] lut = new RasterColor[(int)Math.Pow(2, 16)];
// Get the Minimum and Maximum values so we can calculate appropriate LUT values.
MinMaxValuesCommand cmdMinMax = new MinMaxValuesCommand();
cmdMinMax.Run(image);
int maxVal = cmdMinMax.MaximumValue;
int minVal = cmdMinMax.MinimumValue;
for (int i = 0; i < lut.Length; i++)
{
lut[i].R = Convert.ToByte(Math.Min(255, ((i - minVal) * 255 / (maxVal - minVal))));
lut[i].G = lut[i].R;
lut[i].B = lut[i].R;
}
// Set the new lookup table
image.SetLookupTable(lut);
// Save out the image with the LUT applied. It should look normal
codecs.Save(image, Path.Combine(ImagesPath.Path, "AfterSetLookupTable.bmp"), RasterImageFormat.Bmp, 8);
DicomEngine.Shutdown();
}
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Controls
Imports Leadtools.Dicom
Imports Leadtools.Drawing
Imports Leadtools.Svg
Private Sub SetLookupTable()
DicomEngine.Startup()
' Get the path of the LEADTOOLS images directory
Dim strImagesDirectory As String = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments) & "//LEADTOOLS Images//"
' Create a RasterCodecs class for saving out images
Dim codecs As RasterCodecs = New RasterCodecs()
' Load a dataset
Dim ds As DicomDataSet = New DicomDataSet()
ds.Load(strImagesDirectory & "IMAGE3.dcm", DicomDataSetLoadFlags.None)
' Get the image but do NOT auto-apply any of the LUTs
Dim element As DicomElement = ds.FindFirstElement(Nothing, DicomTag.PixelData, True)
Dim image As RasterImage = ds.GetImage(element, 0, 16, RasterByteOrder.Gray, DicomGetImageFlags.None)
image.UseLookupTable = True
' Save out the image without any LUTs applied. It should be black
codecs.Save(image, strImagesDirectory & "BeforeSetLookupTable.bmp", RasterImageFormat.Bmp, 8)
' Create a LUT
Dim lut As RasterColor() = New RasterColor(CInt(Math.Pow(2, 16)) - 1) {}
' Get the Minimum and Maximum values so we can calculate appropriate LUT values.
Dim cmdMinMax As MinMaxValuesCommand = New MinMaxValuesCommand()
cmdMinMax.Run(image)
Dim maxVal As Integer = cmdMinMax.MaximumValue
Dim minVal As Integer = cmdMinMax.MinimumValue
Dim i As Integer = 0
Do While i < lut.Length
lut(i).R = Convert.ToByte(Math.Min(255, ((i - minVal) * 255 / (maxVal - minVal))))
lut(i).G = lut(i).R
lut(i).B = lut(i).R
i += 1
Loop
' Set the new lookup table
image.SetLookupTable(lut)
' Save out the image with the LUT applied. It should look normal
codecs.Save(image, strImagesDirectory & "AfterSetLookupTable.bmp", RasterImageFormat.Bmp, 8)
DicomEngine.Shutdown()
End Sub
c#[Silverlight C# Example]
using Leadtools;
using Leadtools.Codecs;
using Leadtools.Dicom;
using Leadtools.ImageProcessing;
using Leadtools.ImageProcessing.Core;
using Leadtools.ImageProcessing.Color;
using Leadtools.Examples;
using Leadtools.Windows.Media;
public void SetLookupTable(Stream dataSetStream, Stream destStream1, Stream destStream2)
{
// Create a RasterCodecs class for saving out images
RasterCodecs codecs = new RasterCodecs();
// Load a dataset
DicomDataSet ds = new DicomDataSet();
ds.Load(dataSetStream, DicomDataSetLoadFlags.None);
// Get the image but do NOT auto-apply any of the LUTs
DicomElement element = ds.FindFirstElement(null, DicomTag.PixelData, true);
RasterImage image = ds.GetImage(element, 0, 16, RasterByteOrder.Gray, DicomGetImageFlags.None);
image.UseLookupTable = true;
// Save out the image without any LUTs applied. It should be black
codecs.Save(image, destStream1, RasterImageFormat.Bmp, 8);
// Create a LUT
RasterColor[] lut = new RasterColor[(int)Math.Pow(2, 16)];
// Get the Minimum and Maximum values so we can calculate appropriate LUT values.
MinMaxValuesCommand cmdMinMax = new MinMaxValuesCommand();
cmdMinMax.Run(image);
int maxVal = cmdMinMax.MaximumValue;
int minVal = cmdMinMax.MinimumValue;
for (int i = 0; i < lut.Length; i++)
{
lut[i].R = Convert.ToByte(Math.Min(255, ((i - minVal) * 255 / (maxVal - minVal))));
lut[i].G = lut[i].R;
lut[i].B = lut[i].R;
}
// Set the new lookup table
image.SetLookupTable(lut);
// Save out the image with the LUT applied. It should look normal
codecs.Save(image, destStream2, RasterImageFormat.Bmp, 8);
DicomEngine.Shutdown();
}
vb[Silverlight VB Example]
Imports Leadtools
Imports Leadtools.Codecs
Imports Leadtools.Dicom
Imports Leadtools.ImageProcessing
Imports Leadtools.ImageProcessing.Core
Imports Leadtools.ImageProcessing.Color
Imports Leadtools.Windows.Media
Public Sub SetLookupTable(ByVal dataSetStream As Stream, ByVal destStream1 As Stream, ByVal destStream2 As Stream)
' Create a RasterCodecs class for saving out images
Dim codecs As RasterCodecs = New RasterCodecs()
' Load a dataset
Dim ds As DicomDataSet = New DicomDataSet()
ds.Load(dataSetStream, DicomDataSetLoadFlags.None)
' Get the image but do NOT auto-apply any of the LUTs
Dim element As DicomElement = ds.FindFirstElement(Nothing, DicomTag.PixelData, True)
Dim image As RasterImage = ds.GetImage(element, 0, 16, RasterByteOrder.Gray, DicomGetImageFlags.None)
image.UseLookupTable = True
' Save out the image without any LUTs applied. It should be black
codecs.Save(image, destStream1, RasterImageFormat.Bmp, 8)
' Create a LUT
Dim lut As RasterColor() = New RasterColor(CInt(Math.Pow(2, 16)) - 1) {}
' Get the Minimum and Maximum values so we can calculate appropriate LUT values.
Dim cmdMinMax As MinMaxValuesCommand = New MinMaxValuesCommand()
cmdMinMax.Run(image)
Dim maxVal As Integer = cmdMinMax.MaximumValue
Dim minVal As Integer = cmdMinMax.MinimumValue
Dim i As Integer = 0
Do While i < lut.Length
lut(i).R = Convert.ToByte(Math.Min(255, ((i - minVal) * 255 / (maxVal - minVal))))
lut(i).G = lut(i).R
lut(i).B = lut(i).R
i += 1
Loop
' Set the new lookup table
image.SetLookupTable(lut)
' Save out the image with the LUT applied. It should look normal
codecs.Save(image, destStream2, RasterImageFormat.Bmp, 8)
DicomEngine.Shutdown()
End Sub
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