InvertedText Event

Summary

Optional delegate method for additional processing.

Syntax

Objective-C

C++/CLI

Java

Python

public event EventHandler<InvertedTextCommandEventArgs> InvertedText

typedef void (^LTInvertedTextCommandStatus)(LTRasterImage *image, LTInvertedTextCommandEventArgs *args, LTRemoveStatus *status) 
 
- (BOOL)run:(LTRasterImage *)image 
   progress:(nullable LTRasterCommandProgress)progressHandler 
     status:(nullable LTInvertedTextCommandStatus)invertedTextStatus 
      error:(NSError **)error

public void addInvertedTextCommandListener(InvertedTextCommandListener listener) 
public void removeInvertedTextCommandListener(InvertedTextCommandListener listener)

public: 
event EventHandler<InvertedTextCommandEventArgs^>^ InvertedText

def InvertedText(sender,e): # sender: InvertedTextCommand e: InvertedTextCommandEventArgs

Event Data

The event handler receives an argument of type InvertedTextCommandEventArgs containing data related to this event. The following InvertedTextCommandEventArgs properties provide information specific to this event.

Property	Description
BlackCount	Gets the total number of black pixels in the inverted text region being processed.

Example

Java

using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.ImageProcessing.Core; 
 
public void InvertedTextCommandExample() 
{ 
   // Load an image 
   RasterCodecs codecs = new RasterCodecs(); 
   codecs.ThrowExceptionsOnInvalidImages = true; 
 
   RasterImage image = codecs.Load(Path.Combine(LEAD_VARS.ImagesDir, "Clean.tif")); 
 
   // Prepare the command 
   InvertedTextCommand command = new InvertedTextCommand(); 
   command.InvertedText += new EventHandler<InvertedTextCommandEventArgs>(InvertedTextEvent_S1); 
   command.Flags = InvertedTextCommandFlags.UseDpi; 
   command.MaximumBlackPercent = 95; 
   command.MinimumBlackPercent = 70; 
   command.MinimumInvertHeight = 500; 
   command.MinimumInvertWidth = 5000; 
 
   command.Run(image); 
 
} 
 
private void InvertedTextEvent_S1(object sender, InvertedTextCommandEventArgs e) 
{ 
 
   MessageBox.Show("Size " + "( " + e.BoundingRectangle.Left + ", " + e.BoundingRectangle.Top + ") - " + "( " + e.BoundingRectangle.Right + ", " + e.BoundingRectangle.Bottom + ")" + 
      "\n Black Count " + e.BlackCount.ToString() + 
      "\n White Count " + e.WhiteCount.ToString()); 
   e.Status = RemoveStatus.Remove; 
} 
 
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 invertedTextCommandExample() { 
    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 
    InvertedTextCommand command = new InvertedTextCommand(); 
    command.addInvertedTextCommandListener(invertedTextEvent_S1); 
    command.setFlags(InvertedTextCommandFlags.USE_DPI.getValue()); 
    command.setMaximumBlackPercent(95); 
    command.setMinimumBlackPercent(70); 
    command.setMinimumInvertHeight(500); 
    command.setMinimumInvertWidth(5000); 
 
    command.run(image); 
    codecs.save(image, combine(LEAD_VARS_IMAGES_DIR, "Result.jpg"), RasterImageFormat.JPEG, 24); 
 
    assertTrue(new File(combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")).exists()); 
    System.out.println("Command run and image saved to " + combine(LEAD_VARS_IMAGES_DIR, "Result.jpg")); 
} 
 
InvertedTextCommandListener invertedTextEvent_S1 = new InvertedTextCommandListener() { 
    @Override 
    public void onInvertedTextEvent(InvertedTextCommandEvent e) { 
        System.out.println( 
                "Size ( " + e.getBoundingRectangle().getLeft() + ", " + e.getBoundingRectangle().getTop() + ") - " 
                        + "( " 
                        + e.getBoundingRectangle().getRight() + ", " + e.getBoundingRectangle().getBottom() + ")" + 
                        "\n Black Count " + e.getBlackCount() + 
                        "\n White Count " + e.getWhiteCount()); 
        e.setStatus(RemoveStatus.REMOVE); 
    } 
};

Requirements

Target Platforms

Reference

InvertedTextCommand Class

InvertedTextCommand Members

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Help Version 23.0.2024.3.3

Leadtools.ImageProcessing.Core Assembly

Introduction

Getting Started

Namespaces

Leadtools.ImageProcessing.Core Namespace

Assemblies