IsBlank Property

Summary

(Read-only) Gets a value that indicates whether the page is blank.

Syntax

Objective-C

C++/CLI

Java

Python

public bool IsBlank { get; }

@property (nonatomic, assign, readonly) BOOL isBlank;

public boolean isBlank();

public: 
property bool IsBlank { 
   bool get(); 
}

IsBlank # get  (BlankPageDetectorCommand)

Property Value

true if the page is blank; otherwise, false.

Example

Runs the BlankPageDetectorCommand on an image and determines whether it is blank.

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void BlankPageDetectorCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")); 
 
   // Prepare the command 
   BlankPageDetectorCommand command = new BlankPageDetectorCommand() 
   { 
      // The following properties can be left to their defaults or set to desired values: 
      LeftMargin = 0, 
      TopMargin = 0, 
      RightMargin = 0, 
      BottomMargin = 0, 
      MinimumTextSize = 0 
   }; 
 
   //Determine whether the image is a blank page 
   command.Flags = BlankPageDetectorCommandFlags.DetectNoisyPage; 
   command.Run(image); 
 
   MessageBox.Show(" Is Blank   : " + command.IsBlank + "\n Accuracy : " + (command.Accuracy * 1.0 / 100) + "%", "Blank Page Detection Results"); 
 
} 
 
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 blankPageDetectorCommandExample() { 
 
    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, "Clean.tif")); 
 
    // Prepare the command 
    BlankPageDetectorCommand command = new BlankPageDetectorCommand(); 
 
    // Determine whether the image is a blank page 
    command.setFlags(BlankPageDetectorCommandFlags.DETECT_NOISY_PAGE.getValue()); 
    command.run(image); 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
    System.out.printf( 
            "Command run and image saved to %1s%nBlank Page Detection Results: %nIs blank: %2s%nAccuracy: %3s%%%n", 
            combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), command.isBlank(), (command.getAccuracy() / 100.0)); 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
 
}

Requirements

Target Platforms

Reference

BlankPageDetectorCommand Class

BlankPageDetectorCommand Members

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

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Leadtools.ImageProcessing.Core Namespace

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