MinMaxValuesCommand Class

Summary

Gets the minimum and maximum intensity values present in a 12 or 16-bit grayscale or a 48 or 64-bit color image. This class is available in the Medical Toolkits.

Syntax

Objective-C

C++

Java

public class MinMaxValuesCommand : RasterCommand

Public Class MinMaxValuesCommand  
   Inherits RasterCommand

@interface LTMinMaxValuesCommand : LTRasterCommand

public class MinMaxValuesCommand extends RasterCommand

public ref class MinMaxValuesCommand : public RasterCommand

Remarks

The minimum and maximum values can be used to create a lookup table, for use in the WindowLevelCommand class.
For signed images, the minimum intensity and the maximum intensity values can be negative.
This class supports 12 and 16-bit grayscale images. Support for 12 and 16-bit grayscale images is available only in the Document/Medical toolkits.
This command does not support 32-bit grayscale images.
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.

Example

Run the MinMaxValuesCommand on an image and gets the minimum and maximum pixel values for an image.

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void MinMaxValuesCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, @"ImageProcessingDemo\Beauty16.jpg")); 
 
   // Prepare the command 
   MinMaxValuesCommand command = new MinMaxValuesCommand(); 
   int MinimumValue = 0; //the minimum value. 
   int MaximumValue = 0; //the maximum value. 
   //Get min/max values. 
   command.Run(image); 
   MinimumValue = command.MinimumValue; 
   MaximumValue = command.MaximumValue; 
   MessageBox.Show("The Minimum Value is : " + MinimumValue.ToString() + ", The Maximum Value is : " + MaximumValue.ToString()); 
 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS21\Resources\Images"; 
}

Imports Leadtools 
Imports Leadtools.Codecs 
Imports Leadtools.ImageProcessing.Core 
 
Public Sub MinMaxValuesCommandExample() 
   Dim codecs As New RasterCodecs() 
   codecs.ThrowExceptionsOnInvalidImages = True 
 
   Dim leadImage As RasterImage = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "ImageProcessingDemo\Beauty16.jpg")) 
 
   ' Prepare the command 
   Dim command As MinMaxValuesCommand = New MinMaxValuesCommand 
   Dim MinimumValue As Integer   'the minimum value. 
   Dim MaximumValue As Integer   'the maximum value. 
 
   MinimumValue = 0 
   MaximumValue = 0 
 
   'Get min/max values. 
 
   command.Run(leadImage) 
   MinimumValue = command.MinimumValue 
   MaximumValue = command.MaximumValue 
   MessageBox.Show("The Minimum Value is : " + MinimumValue.ToString() + ", The Maximum Value is : " + MaximumValue.ToString()) 
 
End Sub 
 
Public NotInheritable Class LEAD_VARS 
   Public Const ImagesDir As String = "C:\LEADTOOLS21\Resources\Images" 
End Class