基于模糊Hit-Miss变换的信息填涂卡识别方法研究

Research on optical mark card reader based on blur Hit-Miss transform

介绍了一个针对信息填涂卡识别的OMR技术,这是自动阅卷系统中非常关键的一个环节。介绍了模糊Hit-Miss变换的原理,并基于该原理,详细介绍了OMR算法。为了增强系统的鲁棒性和适应性,对识别信度进行评估,并由用户根据实际情况设定适当的阈值。实验结果表明,本文方法性能优越,有很高的实用价值。

This paper introduced the technology of reading optical mark card, which was the key of automatic paper reader. Introduced and used blur Hit-Miss transform for OMR. In order to increase the robustness and adaptability of system, evaluated recognition confidence. The user can set the valid confidence threshold. The experimental result confirms the advantage and applicability of our algorithm.