How to Use gImageReader: Step-by-Step Tutorial for Beginners (2026)

BygImageReader Team
⚡ Quick Answer

Using gImageReader is simple: import your image or PDF, select the language, let it auto-detect recognition zones (or draw them manually), click Recognize, then export as text or searchable PDF. The whole process takes under a minute for a single page.

Just installed gImageReader and staring at the interface? This beginner tutorial walks you through your first OCR conversion — from importing a document to exporting clean, editable text. No command line, no technical background needed.

Step-by-Step: Your First OCR Conversion

1

Import your document

Click File → Open (or drag and drop) to load an image (JPG, PNG) or PDF. You can also import directly from a connected scanner, or paste a screenshot from your clipboard with Ctrl+V.

2

Select the recognition language

In the toolbar, set the language matching your document (e.g. English, German). Only seeing English? You need to install extra language packs first — see our language installation guide. You can select multiple languages at once for mixed-language documents.

3

Define recognition zones (auto or manual)

Click Auto-detect layout and gImageReader will find the text regions for you. For precise control — say, extracting one table from a busy page — switch to manual mode and draw boxes around exactly the areas you want recognized.

4

Recognize and review

Hit Recognize. The extracted text appears next to the image. Use the built-in spellchecker and the hOCR view to spot and fix errors — misread characters are highlighted so you can correct them against the original scan.

5

Export your result

Export as plain text for editing, or as a searchable PDF — the original image with an invisible text layer, so you can Ctrl+F inside the PDF. See our searchable PDF guide for details.

Pro Tips for Better Accuracy

  • Scan at 300 DPI or higher. Low-resolution images are the #1 cause of garbage output.
  • Use the “Best” language models. The tessdata_best files are slower but noticeably more accurate — worth it for important documents.
  • Preprocess poor images. Use the built-in Image Controls to increase contrast or binarize washed-out scans before recognizing.
  • Batch process with the queue. Add dozens of files at once instead of converting one by one — gImageReader processes them sequentially while you do something else.
Getting gibberish output? Check our troubleshooting: wrong language selected, DPI too low, or a missing language pack cover 90% of cases. The language guide fixes the most common one.
Related guides: gImageReader Qt5 vs Qt6

Frequently Asked Questions

How do I use gImageReader for the first time?
Import a document, select the matching language in the toolbar, auto-detect or manually draw recognition zones, click Recognize, then export as text or searchable PDF. The five steps above cover the complete workflow.
How do I OCR multiple pages at once in gImageReader?
Add all your files to the processing queue (File → Open, select multiple files), define zones if needed, and start recognition. gImageReader processes the queue sequentially — ideal for books and multi-page PDFs.
How do I select only part of an image for OCR?
Switch from automatic layout detection to manual zone selection, then draw a box around the exact region you want recognized — a paragraph, a table, or a single line. Only the selected zones are processed.

Haven’t installed it yet?

Download gImageReader free and follow this tutorial on your own documents.

Download gImageReader Free

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