The Research Based On CMOS Image Sensor Of Two-Dimensional Bar Codes Scanner System

With development of communication and computer technology, bar code technology came into bring. Now one-dimensional bar codes are most widespread. But the information which one-dimensional bar codes store is limited, this is also its most weakness. It must depend on external database, without the database, one-dimensional bar codes have no meanings. Two-dimensional bar codes overcome this weakness. It can encode a large amount of information in a small area, is a full data file. It is an ideal method, which can store information on card and can be decoded by scanner.The article introduces the new design of two-dimensional bar codes scanner and empolders the application system, namely protecting certificate manage system. The system of two-dimensional bar codes is accomplished using CMOS image sensor, high speed DSP is utilized to process image data, FPGA is utilized to control the states of system. The new design has made scanning quicker and easier. It describes the principle, function and hardware structure of system in detail.