OCR is especially useful when working with PDFs, because PDF files are commonly used to store scanned images of text files. PDF is a very widespread format, and so it becomes especially important to be able to OCR PDF files before sharing them with others. OCR makes PDF files text-searchable, so that you can instantly locate relevant text within a PDF document. This saves a great deal of time for everyone who has to work with PDF documents, and allows other important functions, such as text editing. OCR technology has added a new layer of usefulness to traditional PDF documents.
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