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PDF redaction offers options to remove (not just cover or obscure) content within a region of PDF. With printed pages, redaction involves blacking-out or cutting-out areas of the printed page. With electronic documents that use formats such as PDF, redaction typically involves removing sensitive content within documents for safe distribution to courts, patent and government institutions, the media, customers, vendors or any other audience with restricted access to the content.
The redaction process in PDFTron SDK consists of two steps:
A user applies redact annotations that specify the pieces or regions of content that should be removed. The content for redaction can be identified either interactively (e.g. using ‘pdftron.PDF.PDFViewCtrl’ as shown in PDFView sample) or programmatically (e.g. using ‘pdftron.PDF.TextSearch’ or ‘pdftron.PDF.TextExtractor’). Up until the next step is performed, the user can see, move and redefine these annotations.
Using ‘pdftron.PDF.Redactor.Redact()’ the user instructs PDFTron SDK to apply the redact regions, after which the content in the area specified by the redact annotations is removed. The redaction function includes number of options to control the style of the redaction overlay (including color, text, font, border, transparency, etc.).
Redact a PDF document
To redact content from a PDF document.
Samples related to redaction.
APIs related to redaction.
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