GroupDocs.Redaction for .NET 21.3 Release Notes

Major Features

There are the following improvements in this release:

  • Redaction of text in images

Full List of Issues Covering all Changes in this Release

REDACTIONNET-226Redaction of text in imagesFeature

Public API and Backward Incompatible Changes

Redaction of text in images

This feature makes possible redaction of text in image documents and embedded images, using Optical Character Recognition (OCR) tools.

Public API changes

Interface IOcrConnector providing methods that are required to apply textual redactions to image documents and embedded images has been added.
Class RecognizedImage representing text, extracted from an image has been added.
Class TextLine representing a line of text, extracted by OCR engine has been added.
Class TextFragment representing a part of recognized text (word, symbol, etc) has been added.


The following example demonstrates how to use an implementation of IOcrConnector (e.g. AsposeOCRForCloudConnector or any other OCR toolkit connector) to redact embedded images.


            var settings = new RedactorSettings(new MyOwnOcrConnector());
            using (var redactor = new Redactor("FileWithEmbeddedImages.pdf", new LoadOptions(), settings))
                var marker = new ReplacementOptions(Color.Black);
                var result = redactor.Apply(new Redaction[] {
                    new RegexRedaction(@"(?<=Dear\s+)([^,]+)", marker) // person name
                    new RegexRedaction(@"\d{4}", marker)  // card number parts, etc
                if (result.Status != RedactionStatus.Failed)
                    redactor.Save(new SaveOptions(false, "Redacted"));

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