I believe the U.S. agencies use ABBYY FineReader, which does a pretty good job with OCR and text resolution. The U.S. Senate used it when releasing the CIA torture docs awhile ago:<p><a href="http:&#x2F;&#x2F;www.nytimes.com&#x2F;interactive&#x2F;2014&#x2F;12&#x2F;09&#x2F;world&#x2F;cia-torture-report-document.html?_r=0" rel="nofollow">http:&#x2F;&#x2F;www.nytimes.com&#x2F;interactive&#x2F;2014&#x2F;12&#x2F;09&#x2F;world&#x2F;cia-tort...</a>