使用非平稳马尔可夫模型的字符串识别:在邮政编码识别中的应用

D. Bouchaffra, Venu Govindaraju, S. Srihari
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引用次数: 6

摘要

本文介绍了非平稳马尔可夫模型及其在标记字符串识别中的应用,如美国邮件流中的邮政编码。与传统方法中数字被简单地孤立识别不同,我们方法的新颖之处在于,识别得分以及关于各种数字组合频率分布的领域特定知识都被集成到一个统一的模型中。领域知识来源于邮政目录文件。这些数据作为n-grams统计数据输入到模型中,这些统计数据与数字图像的识别分数无缝集成。我们展示了在一组20,000个邮政编码上实现的识别精度(90%)。
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Recognition of strings using nonstationary Markovian models: an application in ZIP code recognition
This paper presents nonstationary Markovian models and their application to recognition of strings of tokens, such as ZIP codes in the US mailstream. Unlike traditional approaches where digits are simply recognized in isolation, the novelty of our approach lies in the manner in which recognitions scores along with domain specific knowledge about the frequency distribution of various combination of digits are all integrated into one unified model. The domain knowledge is derived from postal directory files. This data feeds into the models as n-grams statistics that are seamlessly integrated with recognition scores of digit images. We present the recognition accuracy (90%) achieved on a set of 20,000 ZIP codes.
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