Oracle offers in its Enterprise Content Management (ECM) suite solutions for the capture and document recognition. Oracle Document Capture (ODC) 10g is a desktop application designed to capture documents for, later, recognize some areas and metadata and index them against a target repository which can be a file system, a database, Content Server UCM, etc.
Oracle Document Capture incorporates other features such as indexing, recognition and import of documents in a customized and programmable batch processes. It also includes the Oracle Distributed Document Capture (ODDC) technology, an application based on a web interface to scan and index documents in a distributed environment.
You can follow a guide to install and configure the software here: http://studentsatoracle.blogspot.com/2010/11/odc-install-and-configure-oracle.html
In the viewlet below, you can follow a tutorial to prepare the software to scan invoices (in this example) and index it in a Oracle UCM Content Server. The viewlet shows all the needed steps to be able to scan and index and how to capture metadata automatically using OCR zones.
Documentation:
Oracle's oficial documentation for ECM 10g
Installation guide for ODC
Downloads:
Oracle ODC and ODDC
Viewlet:
(Duration: 8 min.)