Text recognition (OCR)
When a document has no embedded text, Niraqua DjVu can recognize the text on its pages (OCR) so you can search and select it.
When to use it
Section titled “When to use it”Use text recognition when search finds nothing or you cannot select any text. That usually means the document is a scan with no text layer.
Run recognition
Section titled “Run recognition”- Choose View > Text Recognition… or press ⌘ ⇧ T.
- Pick the language of the document. Recognition handles one language at a time, so choose the one that matches most of the text.
- Confirm to start. Progress is shown while the pages are processed.
How it works
Section titled “How it works”- Recognition runs entirely on your Mac using Apple’s built-in frameworks. The contents of your pages are never sent over the network.
- Results are cached, so a document only needs to be recognized once - reopening it later is instant.
Stop recognition
Section titled “Stop recognition”To stop a run in progress, choose View > Stop Text Recognition. Pages that were already recognized stay searchable.
After recognition
Section titled “After recognition”Once recognition finishes, search and text selection work just as they do for documents that already contain text. To bake the recognized text into a shareable file, export to PDF with Enable OCR turned on.