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...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。展开更多
Plane-strain forming limit strain （also known as FLD0） is an important data point on a forming limit diagram （FLD）. The effects of friction coefficients and material parameters on the specimen width associated wit...Plane-strain forming limit strain （also known as FLD0） is an important data point on a forming limit diagram （FLD）. The effects of friction coefficients and material parameters on the specimen width associated with the FLDo （W FLD0） in Marciniak test were studied by finite element simulation. WFLD0 was expressed as a function of the Lankford coefficients, n-value, k-value and sheet thickness and validated with various sheet materials. The determination of W FLD0 is of significance not only to reduce iterative attempts to accurately obtain FLDo, but also to obtain a full valid FLD with the least number of test specimens, which largely increases the efficiency and reduces cost to experimentally measure valid FLDs.展开更多
文摘医疗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。
文摘Plane-strain forming limit strain （also known as FLD0） is an important data point on a forming limit diagram （FLD）. The effects of friction coefficients and material parameters on the specimen width associated with the FLDo （W FLD0） in Marciniak test were studied by finite element simulation. WFLD0 was expressed as a function of the Lankford coefficients, n-value, k-value and sheet thickness and validated with various sheet materials. The determination of W FLD0 is of significance not only to reduce iterative attempts to accurately obtain FLDo, but also to obtain a full valid FLD with the least number of test specimens, which largely increases the efficiency and reduces cost to experimentally measure valid FLDs.
