Why isn't my scan read correctly?

CASUS reads scanned PDFs automatically with text recognition. The paler or more crooked the scan, the more reading errors. CASUS can't open password-protected PDFs.

At a glance

  • Text recognition runs page by page, whenever a page has hardly any text of its own.
  • Such files carry the note Read with OCR. Check numbers, names and dates there with extra care.
  • If a page already has text, CASUS doesn't also read the images on that page.

How it works

  1. 1
    Scan straight, at 300 dpi or more, in black and white or greyscale.
  2. 2
    If the PDF has a password, open it in your PDF program, remove the password and save it again.
  3. 3
    Upload the file again.

If it doesn't work

If CASUS says “No text was found on the scanned pages”, the scan is too pale or blurry. Scan it again. If a good scan isn't read either, write to us.

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Still have questions?

Email us: contact@getcasus.com