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++/CLI

Java

Python

public class MinMaxValuesCommand : RasterCommand

@interface LTMinMaxValuesCommand : LTRasterCommand

public class MinMaxValuesCommand 
    extends RasterCommand

public ref class MinMaxValuesCommand : public RasterCommand

class MinMaxValuesCommand(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.

Java

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:\LEADTOOLS23\Resources\Images"; 
}

 
import java.io.File; 
import java.io.IOException; 
 
import org.junit.*; 
import org.junit.runner.JUnitCore; 
import org.junit.runner.Result; 
import org.junit.runner.notification.Failure; 
import static org.junit.Assert.*; 
 
import leadtools.*; 
import leadtools.codecs.*; 
import leadtools.imageprocessing.core.*; 
 
 
public void minMaxValuesCommandExample() { 
   final String LEAD_VARS_IMAGES_DIR = "C:\\LEADTOOLS23\\Resources\\Images"; 
 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.setThrowExceptionsOnInvalidImages(true); 
 
   RasterImage image = codecs.load(combine(LEAD_VARS_IMAGES_DIR, "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.getMinimumValue(); 
   maximumValue = command.getMaximumValue(); 
   codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
 
   System.out.printf("The Minimum Value is: %s, The Maximum Value is: %s%n", minimumValue, maximumValue); 
   assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
}