Ring Code Reader
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
A reader is illustrated in Fig. 1 which reads and decodes ring code in a wide range of reader-to-code distances and with the code moving in a wide range of speeds and positions. The system uses a video camera to read the code and a microprocessor to control the camera and decode the video information. On receiving a start signal, the microprocessor inputs one frame of digitized video information and stores it in the memory. It then does an area analysis to extract the identifying number. The decoded number is then sent to a supervisor computer. The use of a video camera enables a very large range of working distances and speeds for reading a ring code. The working distance can easily be increased or decreased by changing the size of the code and/or the camera optics. An alternate reader, shown in Fig.