WindowLevelCommand Constructor(int,int,RasterColor[],RasterByteOrder)

Summary

Initializes a new WindowLevelCommand class object with explicit parameters.

Syntax

Objective-C

C++/CLI

Java

Python

public WindowLevelCommand( 
   int lowBit, 
   int highBit, 
   RasterColor[] lookupTable, 
   RasterByteOrder order 
)

- (instancetype)initWithLookupTable:(NSArray<LTRasterColor *> *)lookupTable lowBit:(NSInteger)lowBit highBit:(NSInteger)highBit order:(LTRasterByteOrder)order NS_DESIGNATED_INITIALIZER;

public WindowLevelCommand( 
   int lowBit, 
   int highBit, 
   RasterColor[] lookupTable, 
   RasterByteOrder order 
);

public: 
WindowLevelCommand(  
   int lowBit, 
   int highBit, 
   array<RasterColor>^ lookupTable, 
   RasterByteOrder order 
)

__init__(self,lowBit,highBit,lookupTable,order) # Overloaded constructor

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.

Example

Run the WindowLevelCommand on an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing; 
using Leadtools.ImageProcessing.Core; 
 
public void WindowLevelConstructorExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE3.dcm")); 
 
   // 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); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

WindowLevelCommand Class

WindowLevelCommand Members

Overload List

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Help Version 22.0.2023.11.1

Leadtools.ImageProcessing.Core Assembly

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