OCR Screen Reader
Original Publication Date: 2002-Jul-20
Included in the Prior Art Database: 2003-Jun-21
A program is disclosed that screen reader which is critical assistive technology for visually impaired people, can read not only ordinary GUI screen on local computer but also completely imaged GUI screen sent from remote computer by GUI remote control tool. Most of these GUI remote control tools sends every information on the GUI screen as image. The former screen reader obtains text information by monitoring text drawing API on the screen, then read it by speech synthesis technology. So if GUI remote control tool draws remote GUI as image, screen reader can not obtain any information from there. OCR Screen Reader is based on former screen reader technology. However, when the updated region is draw as image, OCR Screen Reader obtains screen copy of the updated region as 256 scale RGB image by screen to memory BitBlt operation, then store it to Full color image  (Fig. 1). Fig. 1 After that, OCR Screen Reader converts Full color image  to Gray scale image  by following rule for all of the constituent pixels (Fig. 1).