Handling Slashed Zeros in IronOCR
Curtis Chau
Updated: July 6, 2026
Slashed zeros are not recognized correctly, identified as g, 6 or 8?
This can be an issue with the Tesseract language packs.
The following language pack may help to address this issue with slashed zeros:
SlashedZeroOCR
This can then be used with the IronOCR feature to load custom language packs:
Custom Language Example in IronOCR
// Import the IronOcr namespace
using IronOcr;
class Program
{
static void Main(string[] args)
{
// Initialize IronTesseract class
var Ocr = new IronTesseract();
// Use a custom Tesseract language file, which may help with recognizing slashed zeros
Ocr.UseCustomTesseractLanguageFile("custom_tesseract_files/custom.traineddata");
// Specify the OCR input image
using (var Input = new OcrInput())
{
// Load the image into the OCR input
Input.LoadImage(@"images\image.png");
// Perform OCR on the input image
var Result = Ocr.Read(Input);
// Output the recognized text to the console
Console.WriteLine(Result.Text);
}
}
}Imports IronOcr
Module Program
Sub Main(args As String())
' Initialize IronTesseract class
Dim Ocr = New IronTesseract()
' Use a custom Tesseract language file, which may help with recognizing slashed zeros
Ocr.UseCustomTesseractLanguageFile("custom_tesseract_files/custom.traineddata")
' Specify the OCR input image
Using Input = New OcrInput()
' Load the image into the OCR input
Input.LoadImage("images\image.png")
' Perform OCR on the input image
Dim Result = Ocr.Read(Input)
' Output the recognized text to the console
Console.WriteLine(Result.Text)
End Using
End Sub
End ModuleImports IronOcr
Module Program
Sub Main(args As String())
' Initialize IronTesseract class
Dim Ocr = New IronTesseract()
' Use a custom Tesseract language file, which may help with recognizing slashed zeros
Ocr.UseCustomTesseractLanguageFile("custom_tesseract_files/custom.traineddata")
' Specify the OCR input image
Using Input = New OcrInput()
' Load the image into the OCR input
Input.LoadImage("images\image.png")
' Perform OCR on the input image
Dim Result = Ocr.Read(Input)
' Output the recognized text to the console
Console.WriteLine(Result.Text)
End Using
End Sub
End Module
Technical Writer
Curtis Chau holds a Bachelor’s degree in Computer Science (Carleton University) and specializes in front-end development with expertise in Node.js, TypeScript, JavaScript, and React. Passionate about crafting intuitive and aesthetically pleasing user interfaces, Curtis enjoys working with modern frameworks and creating well-structured, visually appealing manuals.
