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Are scanned PDF files searchable without using OCR?

Update:11-30Source: network consolidation
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I want to scan documents into PDF format and would like to be able to search and index content, is there a way to do this without running OCR against it first?  If not is there a product or iFilter that can do OCR and index the context without actually changing the format of the document itself?

The Best Answer

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It is not possible to search a raster graphic for text, since that is what a scan is before it is OCRd. It is possible to OCR without changing the format of the document. Acrobat has the capability to insert the characters behind the graphic rather than replace the graphic.