The algorithm of objective questions marking system based on projection method

Abstract

In all kinds of marking process on objective questions, manual grading is not only a heavy workload, but also occurrs error because of people's fatigue. Therefore, a novel approach is proposed in this paper. Firstly, the special answer card of examination paper is projected several times so that each option is split out from each line. Secondly, the center of gravity for each option is calculated and the circle with the center of gravity as the center and r as the radius is defined. In the end, the number of white dots in the circle is counted, the largest number is the chosen answer. The experimental results show that this method is effective for the given sample.