Low Resolution Bar Code Reading
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-28
Using bar codes is a standard way of identifying materials. Typically, bar codes are read by scanners that read a single horizontal line across the bar code. This disclosure covers reading a barcode (Bar Code 39) with a camera, specifically with low resolution. With a camera system the tradeoffs are between higher resolution or larger field of view. If a bar code is to be automatically read by a camera, and if it is not accurately placed on the object, a large field of view is required so the camera can see the entire barcode and "find" it in its (the camera's) field of view. Often, since the resolution of the camera is limited (usually by price), this field of view means that the resolution of the camera will not be high enough to read the bar code.