Online Marking System In The Design And Implementation Of Image Acquisition Subsystem

With the progress of the society, the computer technology has been graduallyapplied in national exams.The present examination papers on the subject is generallycomposed of two parts, one is the objective; objective questions basically uses the waychoice, has been used for the objective questions. OMR (OMR), score results in almostno error, accurate, efficient; two is subjective; subjective questions focusing on studentscomprehension and expression ability, have no fixed criteria, and the different gradingteacher have different way of thinking, to some extent, increased the control difficultyof subjective question marking error.In order to solve this kind of situation, the domesticindustry with the development of the exam paperless online marking system.Thissystem allows examinees of the same papers by multiple grading teacher respectivelyscore, score management system computer to a plurality of marking the teacher’sindividual score results management, effective control of a scoring error.Paperless scoring system information collection system known as the imageprocessing and recognition subsystem, the information acquisition system and imageprocessing, OMR technology, OCR technology, bar code recognition, intelligentrecognition technologies, can provide objective test scores and clear, after cutting the256gray-scale image.Because the digital image processing technology has a strongtheoretical depth and application value in the world, it is also a very popular researchdirection, but these techniques applied to the examination paper processing research isvery few, because every examination document has its specific characteristics, soalthough some techniques are very practical, but the application effect is very limited.This paper mainly is that the image processing and recognition technology isapplied in Paperless online marking paper processing.Use of document image digitalprocessing technology research and examination of document image, mainly to solvethe data processing and storage efficiency, quality of image analysis, image recognitionapplication and other aspects of the outstanding problems.The document imageprocessing system to the digital image processing technique and intelligent recognitionwas studied and the algorithm design, especially for image processing and recognition module design and implementation in detail, including the design of softwareframework, process design, algorithm design, the application interface program design,finally realizes the document image processing sub system development andapplication.