At 150 dpi, OCR accuracy is slightly lower. Note that scanning at 300 dpi produces the best text for conversion.
Scanning Quality To apply 'Recognize Text' operation to a PDF, the original scanner resolution must have been set at 72 dpi or higher.
If you cannot highlight a text on the page, then the document is not searchable. (such as the Notepad, Microsoft Word or Outlook), then the document does contain a searchable text. If you can highlight a text string and copy/paste it into a text editor Is my PDF searchable? Open the PDF document in the Adobe® Acrobat® and try to select any text on The document cannot be used for any text-based processing such as automated bookmarking and linking, text search and extraction, keyword-based redacting and etc. Why Recognize Text? If the document does not have any searchable text, then it significantly limits its functinality. The searchable text is added behind the page image, so the visual appearance of the Processes each page and creates an invisible layer of text that can be searched or copied and The 'Recognize Text' operation (also known as 'Optical Character Recognition' or OCR) Originally, the scanned PDF documents do not contain any searchable text.Įach page is just an image. Recognize Text in Scanned PDF Documents Introduction This tutorial shows how to make scanned PDF documents searchable using 'Recognize Text' operationĪvailable in the Adobe® Acrobat® software.