OCR Tesseract Image DPI

VB C#

using IronOcr;
using System;

var ocrTesseract = new IronTesseract();

using (var ocrInput = new OcrInput(@"images\image.png"))
{
    ocrInput.TargetDPI = 300;

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

Imports IronOcr
Imports System

Private ocrTesseract = New IronTesseract()

Using ocrInput As New OcrInput("images\image.png")
	ocrInput.TargetDPI = 300

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

Install-Package IronOcr

OCR Tesseract Image DPI

The OcrInput class will automatically resolve low resolution images for IronTesseract.

Although Tesseract generally requires a 300 DPI input - IronTesseract has been tuned to work with 99+% accuracy on 225 DPI scans. This can double OCR speed.

Too high a DPI is slow. Too low a DPI causes inaccuracies. If in doubt, do nothing and Iron Tesseract will preconfigure everything for you.