阅卷系统中的答题区域快速智能分割算法研究Research on answer area fast intelligent segmentation algorithm in marking system
方慧琴,程永强
摘要(Abstract)：
针对网上阅卷系统中主观题评阅不能根据考生实际作答区域智能分割答题卡的问题,提出答题区域快速智能分割算法。首先对图像进行向下采样,然后进行答题区域边界框的筛选,仅对满足条件的点进行Hough变换,从而快速检测到图像的倾斜角度并对其进行倾斜矫正,最后进行答题区域的智能分割,采用水平投影结合竖直方向腐蚀的方法,消除了投影图像中影响智能分割的白色空隙,根据所得投影图像的水平投影累计值智能地分割答题区域。用OpenCV实现了答题卡的图像处理,实验表明快速Hough变换直线检测法比传统Hough变换节约了至少2.5 s,初步实现了主观题答题区域的智能分割,此方法适用于目前大量使用的有边界框的主观题答题卡的评阅。
关键词(KeyWords)： 网上阅卷;图像处理;直线检测;倾斜矫正;图像分割;OpenCV
基金项目(Foundation): 国家自然科学基金项目(61271249)~~
作者(Author): 方慧琴,程永强
DOI: 10.16652/j.issn.1004-373x.2018.20.008
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