Filtros de otimização de imagem OCR

VBC#

using IronOcr;
using System;

var ocrTesseract = new IronTesseract();
using var ocrInput = new OcrInput();
// First load all image(s)
ocrInput.LoadImage(@"images\image.png");

// Note: You don't need all of them; most users only need Deskew() and occasionally DeNoise()
ocrInput.WithTitle("My Document");
ocrInput.Binarize();
ocrInput.Contrast();
ocrInput.Deskew();
ocrInput.DeNoise();
ocrInput.Despeckle();
ocrInput.Dilate();
ocrInput.EnhanceResolution(300);
ocrInput.Invert();
ocrInput.Rotate(90);
ocrInput.Scale(150);
ocrInput.Sharpen();
ocrInput.ToGrayScale();
ocrInput.Erode();

// WIZARD - If you are unsure use the debug-wizard to test all combinations:
string codeToRun = OcrInputFilterWizard.Run(@"images\image.png", out double confidence, ocrTesseract);
Console.WriteLine(codeToRun);

// Optional: Export modified images so you can view them.
foreach (var page in ocrInput.GetPages())
{
    page.SaveAsImage($"filtered_{page.Index}.bmp");
}

var ocrResult = ocrTesseract.Read(ocrInput);
Console.WriteLine(ocrResult.Text);

Imports IronOcr
Imports System

Dim ocrTesseract = New IronTesseract()
Using ocrInput = New OcrInput()
    ' First load all image(s)
    ocrInput.LoadImage("images\image.png")

    ' Note: You don't need all of them; most users only need Deskew() and occasionally DeNoise()
    ocrInput.WithTitle("My Document")
    ocrInput.Binarize()
    ocrInput.Contrast()
    ocrInput.Deskew()
    ocrInput.DeNoise()
    ocrInput.Despeckle()
    ocrInput.Dilate()
    ocrInput.EnhanceResolution(300)
    ocrInput.Invert()
    ocrInput.Rotate(90)
    ocrInput.Scale(150)
    ocrInput.Sharpen()
    ocrInput.ToGrayScale()
    ocrInput.Erode()

    ' WIZARD - If you are unsure use the debug-wizard to test all combinations:
    Dim codeToRun As String = OcrInputFilterWizard.Run("images\image.png", confidence:=Nothing, ocrTesseract)
    Console.WriteLine(codeToRun)

    ' Optional: Export modified images so you can view them.
    For Each page In ocrInput.GetPages()
        page.SaveAsImage($"filtered_{page.Index}.bmp")
    Next

    Dim ocrResult = ocrTesseract.Read(ocrInput)
    Console.WriteLine(ocrResult.Text)
End Using

PM > Install-Package IronOcr

Install-Package IronOcr

Filtros de otimização de imagem OCR

A classe OcrInput oferece controle granular para desenvolvedores C# e .NET para pré-processar a entrada de imagem para velocidade e precisão antes do processamento de OCR. Isso invalida a prática comum de usar scripts em lote do Photoshop ou ImageMagick para preparar imagens para OCR.