OCR Tesseract Image DPI

VB C#

using IronOcr;
using System;

var ocrTesseract = new IronTesseract();

using var ocrInput = new OcrInput();
ocrInput.TargetDPI = 300;

ocrInput.LoadImage(@"images\image.png");

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

Imports IronOcr
Imports System

Private ocrTesseract = New IronTesseract()

Private ocrInput = New OcrInput()
ocrInput.TargetDPI = 300

ocrInput.LoadImage("images\image.png")

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

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.