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

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:\LEADTOOLS22\Resources\Images"; 
}

Requirements

Target Platforms

Reference

InvertedTextCommand Class

InvertedTextCommand Members

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Help Version 22.0.2023.11.1

Leadtools.ImageProcessing.Core Assembly

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Leadtools.ImageProcessing.Core Namespace

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