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There are two options to perform redaction. First is using a UI component that provides tools to select text or create regions interactively. Second is an API guide to programmatically apply redactions.
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 consists of two steps:
PDFViewCtrl) or programmatically (e.g. using
TextExtractor). Up until the next step is performed, the user can see, move and redefine these annotations.
Redactor.Redact()the user instructs PDFTron 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.).
PDFTron Redactor makes sure that if a portion of an image, text, or vector graphics is contained in a redaction region, that portion of the image or path data is destroyed and is not simply hidden with clipping or image masks.
PDFTron API can also be used to review and remove metadata and other content that can exist in a PDF document, including XML Forms Architecture (XFA) content and Extensible Metadata Platform (XMP) content.
|Text redaction||Rectangular redaction|
The built-in redaction tool will continue to improve in the near future.
Keep in mind that PDFTron's redact feature can do much more! See related topics here:
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