Guides

Practical guides to OCR, spelling, English punctuation and text analysis: prepare images, review extracted text and understand word frequency and filler content.

How to check spelling in text from a photo

Extract printed text from a photo or screenshot with Istio, select its language and check spelling. Step-by-step instructions, an example and OCR limitations.

How to check punctuation in English text

Check English punctuation online: introductory clauses, direct address and commas between independent clauses. Examples and the limits of automated suggestions.

Repetition, filler content and keyword density: understanding text analysis

Understand repetition, filler content and keyword density with Istio formulas, worked examples and the effect of morphology. These metrics do not guarantee search rankings.

Why OCR gets text wrong and how to improve the result

Fix missing words, wrong letters and empty OCR results. Check image quality, text language and layout, then review the recognized text in Istio.