Redact or Black out Text in Image within PDF using C#

RedactTextInImage.cs

// Redact Text in PDF and Text in Image like scanned document using C#
var settings = new RedactorSettings(new AsposeOCRStandaloneConnector(@"LICENSE_PATH"));
using (var redactor = new Redactor(@"path/document.pdf", new LoadOptions(), settings))
{
    var marker = new ReplacementOptions(Color.Black);
    var redactions = new Redaction[] {
        new RegexRedaction(@"(?<=Dear\s+)([^,]+)", marker), // Card Holder Name
        new RegexRedaction(@"\d{2}/\d{2}", marker), // Valid Thru
        new RegexRedaction(@"\d{4}", marker)  // Card Number
    };
    var result = redactor.Apply(redactions);
    if (result.Status != RedactionStatus.Failed)
    {
        redactor.Save(new SaveOptions(false, "OnPremise"));
    }
}