Design And Implementation Of Examination Paper Image Acquisition System Based On FPGA And ARM11

With the rapid development of computer and information technology,in the field of our country education marking,the new mode of online marking which saves time,manpower and material resources,improves the scoring efficiency instead of the traditional manual marking.However,in the process of collecting and transporting the the examination papers before scanning of them,it is difficult to avoid the loss,damage,damp of the papers and so on.The scanning effect of the examination paper will inevitably be affected,and then affect the online marking work.With the appearance and development of "Internet plus" and "cloud technology" and other related technology,the concept of "Cloud examination room" also arises at the historic moment.The so-called "cloud examination room ",that is intelligent and informational examination room which integrates the examinee identification,monitoring of the whole examination process,real-time scanning of examination papers and image information upload security.The design of small size and low price of examination room special scanner which can verify examine identity and real-time upload scanning examination papers in the field of examination.In this paper,the CIS contact image sensor is used to design and implement the test paper image acquisition system based on FPGA and ARM11.The main contents include the following three aspects.According to the function requirements of the test paper image collection,this paper from three aspects of the mechanical structure,the hardware structure and the software architecture completed the whole scheme design and function realization of the system.The mechanical structure of the system adopts the vertical and smooth double rail structure,which can effectively reduce the volume of the system;The system hardware uses "FPGA+ARM" dual processor architecture,FPGA and ARM functions are independent of each other,and the system is stable and reliable,and on the basis of this framework to complete design of modules hardware circuit and PCB,that consists of test paper and fingerprint image acquisition,image storage,image processing,image data transmission,motor control and power supply module;Completed the design of driver transplant and image acquisition program interface in Linux system,using Verilog HDL language to complete the IP core design of FPGA function module,complete the software well and achieve the functional requirements of the system;Through the joint debugging of software and hardware,the function of the system is finally completed and implemented.The analysis shows that this design can complete the test paper scanning function being used in the examination room can overcome the shortcomings of the current online marking,and further improve the efficiency of online marking,it has certain practical value.