MACHINE VISION INSPECTION ALGORITHM OF SEVEN SEGMENT LCDs
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2001-Nov-12
In order to successfully screen common defects present in pager numeric LCD displays a machine vision system may be employed. The machine vision system for this application is a Macintosh II computer with a Data Translation frame grabber board and a Pulnix TM640 CCD camera. This system delivers 256 gray levels and 640 by 460 pixel resolu- tion. The programming was done in RAIL, a language developed by Automatix Inc. RAIL is a high level interpretive language similar to PASCAL with added vision processing functions.