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Limina offers two ways of scanning PDF files for PII and creating de-identified or redacted copies. PDF redaction approach could be selected by changing the approach parameter under pdf_options.

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Standard PDF processing

Standard PDF processing involves rendering each PDF page as an image, and processing them as images. Then a new PDF is created using the redacted/de-identified images. Standard PDF processing can include an invisible, de-identified text layer. Standard PDF processing will replace PII with a blurred/black box.
More information about Standard PDF processing can be found under Processing PDF Files (Standard).

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Enhanced PDF Processing

Enhanced PDF processing allows PDFs to be processed natively. When Enhanced PDF processing is selected, the resulting de-identified PDF will have in-line replacements instead of blurred/black boxes.
More information about Enhanced PDF processing can be found under Processing PDF Files (Enhanced).
The approach parameter under pdf_options can be set as:
  • standard (Standard, default)
  • enhanced (Enhanced)