New answers tagged ocr
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Saraff.Twain.NET is an open source library that can be used for acquiring images from the scanner. Syncfusion Essential PDF can be used to save the image in a PDF.
Example
Syncfusion Tesseract OPX has a wrapper for the Tesseract engine that can be used to process the text in images within PDF documents and overlay them with searchable text.
//Load a PDF ...
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