医疗化验单区域检测方法研究  

Research on Regional Detection Method of Medical Test Sheet

作　　者：王希畅 吕学强[1] 何健 董志安[2] WANG Xi-chang;LYU Xue-qiang;HE Jian;DONG Zhi-an(Beijing Key Laboratory of Internet Culture Digital Dissemination,Beijing Information Science and Technology University,Beijing 100101,China;Beijing Lawke Intelligent Medical Technology Co.,Ltd.,Beijing 100015,China;Institute of Internet Industry,Tsinghua University,Beijing 100084,China)

机构地区：[1]北京信息科技大学网络文化与数字传播北京市重点实验室,北京100101 [2]北京洛奇智慧医疗科技有限公司,北京100015 [3]清华大学互联网产业研究院,北京100084

出　　处：《计算机技术与发展》2021年第5期174-179,共6页Computer Technology and Development

基　　金：国家自然科学基金项目(61671070);国家语委重点项目(ZDI135-53);自然科学重点实验室基金(6142006190301);北京成像技术高精尖创新中心项目(BAICIT-2016003)。

摘　　要：医疗OCR(optical character recognition,光学字符识别)目前已成为医疗化验单自动处理中的热门领域,其中检验项区域检测是必不可少的预处理,对准确提取化验单的有效信息具有重要的作用。不同的区域检测方法适合不同类型的化验单,因此找到合适的医疗化验单区域检测方法成为一项重要研究,为后续化验单识别奠定基础。文中以某医院真实化验单为实验数据,在python环境下着重研究基于霍夫直线检测、单侧区域检测、双侧区域检测这三种检验项区域检测方法;阐述每种方法的原理与流程;讨论在不同的拍摄条件下(高拍仪拍摄,手机拍摄)每种方法所适合的化验单类型;对比分析每种方法的检测效果。实验结果表明,利用合适的检测方法对医疗化验单进行区域检测,可准确地提取出化验单的检验项区域。At present,medical optical character recognition(OCR)has become a hot field in the automatic processing of medical test sheets.The detection of inspection item area is an essential pretreatment,which plays an important role in the accurate extraction of the effective information of the test sheet.Different regional detection methods are suitable for different types of test sheets,so it is an important research to find a suitable regional detection method for medical test sheets,which lays a foundation for the subsequent identification of test sheets.Taking the real test sheet of a hospital as the experimental data,we focus on the three regional detection methods based on Hough linear detection,unilateral regional detection and bilateral regional detection under the python environment,describe the principle and process of each method,discuss the suitable test sheet types of each method under different shooting conditions(high-resolution camera shooting,mobile phone shooting)and analyze the detection effect of each method through comparsion.The experiment shows that the inspection item area of the test sheet can be accurately extracted by using the appropriate detection method.

关 键 词：区域检测 医疗化验单 直线检测 霍夫变换 图像二值化 边缘检测 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]