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Making a PDF include OCR'd text seems to by definition require writing twice. It has to be edited to add the OCR'd text that was not in the original image-only
by jrochkind1 6y ago
Making a PDF include OCR'd text seems to by definition require writing twice. It has to be edited to add the OCR'd text that was not in the original image-only PDF, no?
I mean, you can say that the second PDF is a different PDF that has only been written once, but you can say that about literally any edit, "write once" no longer means anything if you think about it that way.
- aardvark179 6y agoYou can do the OCRing as a part of the original scanning process. You define a blank font and place the letters at the appropriate points to allow text selection. This is also done for documents that use fonts which are not licensed for embedding, it reduces on screen rendering quality slightly as you have lost any hinting information but it’s fine with printing and reserves the intent.
- tonyedgecombe 6y agoPDF does support appending to the file and it’s not just for adding pages. You can make changes throughout the original document. I’m not sure that is what Preview does though.