We are looking at implementing OCR solutions for our contracts management application; if you have implemented or evaluated any OCR solutions for SharePoint; please share your thoughts/opinions.
There are a number of vendors that offer scan/OCR solutions that integrate with SharePoint including KnowledgeLake.
This looks like a very rare requirement so I don't think there is any readily available product. You can write your own using c# and OCR libraries.
Certain integration scenarios are also available from ABBYY such as FlexiCapture and Recognition Server: http://www.abbyy.com/data_document_capture/
Didn't have the chance to compare to KnowledgeLake.
Not affiliated. Worked a bit with the Recognition Server last year.