LowBit Property

Summary

Gets or sets the image window level low bit value.

Syntax

Objective-C

C++/CLI

Java

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 ); 
}

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:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

RasterImage Class

RasterImage Members

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Help Version 22.0.2023.2.2

Leadtools Assembly

Introduction

Getting Started

Namespaces

Leadtools Namespace

Leadtools.ImageProcessing Namespace

Assemblies