The Research And Realization Of Formal Description And Digital Image Processing Technology Based On The Online Score System

In recent years, it profoundly affects all aspects of education and test that the development of network technology, computer technology, image processing technology, Nowadays,the field of education is under a tremendous change and the importance of tests are inclined to the check of students' creativity and ability of practice.The subjective part of papers are increasing day by day, however,the marking of subjective part is apt to be affected by various factors and it's very hard to assure the fairness of tests.By means of the principle of error controlling, paperless marking on line can get the average score from different marking teachers, which can avoid wrong score gave by a teacher mistakenly and guarantee the opening, fairness and just. However,marking on line needs digitizing the students' papers in advance and stored into the computer system, then, cut and isolate the information of papers that were digitized in order to achieve the single question and the objective part should be marked automatically at the same time. The marking process and quality will be affected badly if there are problems in the front work.Thus that will have effect on students and the society. Therefore,during of the time of developing marking on line system, it's necessary to attach importance to the front work of marking.the main tasks of this paper are as follows:(1)Used the description technology of Z language to describe the core model of the system and improved the reliability of the marking on line software system.(2)Adopted the MFC designing frame and compared different kinds of digital image processing technology, we finally selected an appropriate digital image processing technology to make the front processing work of images and automatic marking of objective part come true and developed a data sub-system based on C/S model.(3)Uses the B/S structure, unified the MVC pattern, the DAO pattern, the factory pattern to complete the error-checking and correcting module.Optimized the connection pool technology to make sure the capability of the database server can developed to the largest.