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Threshold Property

Summary
Gets or sets the delta value for detecting blank space.
Syntax
C#
Objective-C
C++/CLI
Java
Python
public int Threshold { get; set; } 
@property (nonatomic, assign) NSUInteger threshold; 
public int getThreshold(); 
public void setThreshold( 
   int intValue 
); 
public: 
property int Threshold { 
   int get(); 
   void set (    int ); 
} 
Threshold # get and set (AutoCropRectangleCommand) 

Property Value

Delta value for detecting blank space. Starting at each edge of the image and evaluating toward the center, any change in intensity that is less than or equal to this property is considered blank space. Valid values are 0 to 255.

Example
C#
Java
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void AutoCropRectangleCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Master.jpg")); 
 
   // Prepare the command 
   AutoCropRectangleCommand command = new AutoCropRectangleCommand(); 
   command.Threshold = 0; 
   command.Run(image); 
   MessageBox.Show("Left = " + command.Rectangle.Left.ToString() + "\n" + 
         "Top = " + command.Rectangle.Top.ToString() + "\n" + 
         "Right = " + command.Rectangle.Right.ToString() + "\n" + 
         "Bottom = " + command.Rectangle.Bottom.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.Test; 
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.AutoCropRectangleCommand; 
 
 
public void autoCropRectangleCommandExample() { 
 
    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, "Master.jpg")); 
 
    // Prepare the command 
    AutoCropRectangleCommand command = new AutoCropRectangleCommand(); 
    command.setThreshold(0); 
    command.run(image); 
 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 0); 
 
    System.out.printf("Left = %1s%nTop = %2s%nRight = %3s%nBottom = %4s%n", command.getRectangle().getLeft(), 
            command.getRectangle().getRight(), command.getRectangle().getRight(), 
            command.getRectangle().getBottom()); 
 
    System.out.println("Command run and image saved to: " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
 
} 
Requirements

Target Platforms

Help Version 23.0.2024.3.3
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© 1991-2024 LEAD Technologies, Inc. All Rights Reserved.

Leadtools.ImageProcessing.Core Assembly
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.