OCR Tesseract Image DPI
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);
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OCR Tesseract Image DPI

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 maintain high accuracy on lower-resolution scans. This can improve 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.

How to Improve Low-Quality DPI in Tesseract

  1. Install the OCR library to improve low-quality DPI.
  2. Construct an IronTesseract instance.
  3. Create an OcrInput object with the path to the image.
  4. Choose a target DPI value.
  5. Invoke the Read method with the OcrInput object.
Explore How to Use Input Images with IronOCR
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