LowBit Property

Summary

Gets or sets the image window level low bit value.

Syntax

Objective-C

C++/CLI

Java

Python

public int LowBit { get; set; }

@property (nonatomic, assign) NSInteger lowBit

public int getLowBit(); 
public void setLowBit( 
   int intValue 
);

public: 
property int LowBit { 
   int get(); 
   void set (    int ); 
}

LowBit # get and set (RasterImage)

Property Value

Value indicating the low bit used for window leveling.

Remarks

The LowBit value will be: 0 <= LowBit <= HighBit <= (11 for 12-bit grayscale or 15 for 16-bit grayscale). A value of -1 will be treated as 0.

For more information, refer to Grayscale Images.

Example

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 Leadtools.Svg; 
 
 
public void WindowLevelExample() 
{ 
   RasterCodecs codecs = new RasterCodecs(); 
   // Load an image that has BottomLeft ViewPerspective 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1.CMP")); 
 
   // Change the image to 16-bit grayscale  
   GrayscaleCommand grayscaleCmd = new GrayscaleCommand(16); 
   grayscaleCmd.Run(image); 
 
   MinMaxBitsCommand minMaxBitsCmd = new MinMaxBitsCommand(); 
   minMaxBitsCmd.Run(image); 
 
   MinMaxValuesCommand minMaxValuesCmd = new MinMaxValuesCommand(); 
   minMaxValuesCmd.Run(image); 
 
   int lowBit = minMaxBitsCmd.MinimumBit; 
   int highBit = minMaxBitsCmd.MaximumBit; 
 
   int size = (1 << (image.HighBit - image.LowBit + 1)); 
   RasterColor[] palette = new RasterColor[size]; 
 
   // fill the first half of the LUT with RED 
   for (int x = 0; x < size / 2; x++) 
   { 
      palette[x].R = 255; 
      palette[x].G = 0; 
      palette[x].B = 0; 
      palette[x].Reserved = 0; 
   } 
 
   int minVal = minMaxValuesCmd.MinimumValue; 
   int maxVal = minMaxValuesCmd.MaximumValue; 
 
   // Fill the rest with gray values  
   for (int x = (size / 2); x < size; x++) 
   { 
      palette[x].R = Convert.ToByte(Math.Min(255, ((x - minVal) * 255 / (maxVal - minVal)))); 
      palette[x].G = palette[x].R; 
      palette[x].B = palette[x].R; 
      palette[x].Reserved = 0; 
   } 
   image.WindowLevel(lowBit, highBit, palette, RasterWindowLevelMode.PaintAndProcessing); 
 
   codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "IMAGE1_WindowLevel.BMP"), RasterImageFormat.Bmp, 0); 
 
   image.Dispose(); 
   codecs.Dispose(); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS23\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 23.0.2024.5.22

Leadtools Assembly

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Getting Started

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Leadtools Namespace

Leadtools.ImageProcessing Namespace

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