| 基于Hough变换的答题卡识别 |
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| 引用本文： | 罗朝阳,张鹏超,姚晋晋,王彦,赵瑞杰.基于Hough变换的答题卡识别[J].计算机应用与软件,2020,37(3):251-256. |
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| 作者姓名： | 罗朝阳 张鹏超 姚晋晋 王彦 赵瑞杰 |
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| 作者单位： | 陕西理工大学机械工程学院 陕西 汉中 723000;陕西省工业自动化重点实验室 陕西 汉中 723000 |
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| 基金项目： | 陕西省工业科技攻关计划;协同创新项目 |
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| 摘 要： | 针对光电式阅卷机价格昂贵,使用成本高,设备利用率低的缺点,提出一种基于Hough变换的答题卡识别方法。运用数字图像处理的手段,对答题卡图像进行灰度拉伸、图像滤波、图像二值化等预处理;依据Hough变换的直线建立选项网;根据填涂区域的几何属性进行识别判断。测试结果表明,该算法对于答题卡的识别具有高效率、高准确率、使用方便、成本低廉的特点,具有一定的应用价值。
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| 关 键 词： | HOUGH变换 自动阅卷 图像识别 答题卡 |
ANSWER SHEET RECOGNITION BASED ON HOUGH TRANSFORM |
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| Luo Zhaoyang,Zhang Pengchao,Yao Jinjin,Wang Yan,Zhao Ruijie.ANSWER SHEET RECOGNITION BASED ON HOUGH TRANSFORM[J].Computer Applications and Software,2020,37(3):251-256. |
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| Authors: | Luo Zhaoyang Zhang Pengchao Yao Jinjin Wang Yan Zhao Ruijie |
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| Affiliation: | (School of Mechanical Engineering,Shaanxi University of Technology,Hanzhong 723000,Shaanxi,China;Shaanxi Key Laboratory of Industrial Automation,Hanzhong 723000,Shaanxi,China) |
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| Abstract: | Aiming at the disadvantages of the optical mark reader,such as high price,high cost and low utilization rate of equipment,this paper proposes an answer sheet recognition method based on the Hough transformation.By means of digital image processing,grey-scale stretching,image filtering,image binarization and other pretreatments were carried out on the answer sheet images.According to line of the Hough transformation,the selection network was established.Finally,we recognized and identified on the basis of the geometric properties of the filled area.The test results show that the algorithm has the characteristics of high efficiency and high accuracy for the recognition of the answer sheet.And it is easy to use and low cost,and has certain application value. |
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| Keywords: | Hough transform Automatic scoring Image recognition Answer sheet |
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