胶囊内窥镜像素数的匹配率和分辨有效性评价法研究
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摘要
针对胶囊式内窥镜,建立了全视场光学分辨率与像素数匹配水平的评价,以及像素数分辨有效性的评价方法。该方法通过选择过面阵传感器行或列扫描水平的光轴截面为分析用子午面,以光学分辨角和像素元投射角为分析单元导出线分辨元数、线像素数有效率、视场中心匹配率及全视场最大匹配率,并采用球面视场的分辨距与分辨角简易转换来简化测量方法。这些参数构成了胶囊式内窥镜像素数的匹配率和分辨有效性的评价依据,可为产品设计分析、评价及修改提供参考依据。
The evaluation for the matching level between the optical resolution and the pixels number on the full field of view of the capsule endoscope, and the evaluation methods for the resolution effectiveness of pixels number were established. This method selects the horizontal optical axis section as the meridian plane to analyze. The section passing through the planar array sensor is row or column scanned. The line resolution elements number, the line pixel efficiency, the center field matching rate, and the full field maximum matching rate were derived by the analysis unit using the optical resolution angle and the pixel element projection angle. The simple conversion method of resolution length and resolution angle on the spherical field of view can simplify the measurement. These parameters not only constitute the evaluation basis for matching ratio and resolution validity of the pixel number of the capsule endoscope, but also offer a reference for product design, analysis and modification.
The evaluation for the matching level between the optical resolution and the pixels number on the full field of view of the capsule endoscope, and the evaluation methods for the resolution effectiveness of pixels number were established. This method selects the horizontal optical axis section as the meridian plane to analyze. The section passing through the planar array sensor is row or column scanned. The line resolution elements number, the line pixel efficiency, the center field matching rate, and the full field maximum matching rate were derived by the analysis unit using the optical resolution angle and the pixel element projection angle. The simple conversion method of resolution length and resolution angle on the spherical field of view can simplify the measurement. These parameters not only constitute the evaluation basis for matching ratio and resolution validity of the pixel number of the capsule endoscope, but also offer a reference for product design, analysis and modification.
引文
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[15]Ding Q,Wang H N.An imaging technique of microcapsule endoscope using a GRIN lens[J].Acta Photonica Sinica,2004,33(7):889-892.丁琴,王惠南.采用GRIN透镜的微胶囊内窥成像技术[J].光子学报,2004,33(7):889-892.
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[17]Ouyang M,Jeng W D.Design and analysis of radial imaging capsule endoscope(RICE)system[J].Optics Express,2011,19(5):4369-4383.
[2]王庆有.图像传感器应用技术[M].2版.北京:电子工业出版社,2013.
[3]Chen Y.Study of CMOS vertical integrated pixel and image sensor[D].Hangzhou:Zhejiang University,2009.陈远.基于垂直层叠结构的CMOS像素和图像传感器研究[D].杭州:浙江大学,2009.
[4]Jia X H,Zhang Q Y,Duan X D,et al.Medical endoscopes-Capsule endoscopes:YY 1298-2016[S].Beijing:China Standard Press,2018.贾晓航,张沁园,段晓东,等.医用内窥镜胶囊式内窥镜:YY1298-2016[S].北京:中国标准出版社,2018.
[5]Jia X H,He T,Yan Q L,et al.Medical endoscopes-rigid endoscope-Part 1:optical properties and test methods:YY0068.1-2008[S].Beijing:China Standard Press,2009.贾晓航,何涛,颜青来,等.医用内窥镜硬性内窥镜第1部分:光学性能及测试方法:YY 0068.1-2008[S].北京:中国标准出版社,2009.
[6]Jia X H,Yan Q L,Wen Y.Evaluation base and method of medical rigid endoscope distortion[J].Acta Optica Sinica,2006,26(8):1226-1230.贾晓航,颜青来,文燕.医用硬性内窥镜畸变的评定基础和方法[J].光学学报,2006,26(8):1226-1230.
[7]Liu M C,Zhang L,Liu P P,et al.Design of lens for 3 mega-pixel mobile phone camera[J].Journal of Applied Optics,2008,29(6):944-948.刘茂超,张雷,刘沛沛,等.300万像素手机镜头设计[J].应用光学,2008,29(6):944-948.
[8]Gu J D,Xiang Y.Optical system design of electronic endoscope[J].Journal of Changchun University of Science and Technology(Natural Science Edition),2015,38(2):18-20,24.谷俊达,向阳.电子内窥镜光学系统设计[J].长春理工大学学报(自然科学版),2015,38(2):18-20,24.
[9]Wang J H,Lu J H,Xu M.Optical design of the single-chip capsule endoscopt with harmonic diffraction surface[J].Laser&Optoelectronics Progress,2012,49(12):122203.王军华,卢景红,徐敏.含有谐衍射面的单片式胶囊内窥镜光学设计[J].激光与光电子学进展,2012,49(12):122203.
[10]Zhu J W,Ding G L.Design of an ultra-small wide-angle medical endoscope lens[J].Laser&Optoelectronics Progress,2014,51(9):181-186.朱佳巍,丁桂林.一款超小型广角医用内窥镜镜头的设计[J].激光与光电子学进展,2014,51(9):181-186.
[11]Zhang Y H,Huang Z H.The progress of capsule endoscope technology[J].Modern Instruments,2006,12(4):4-7.张艳辉,黄战华.胶囊内窥镜技术的研究进展[J].现代仪器,2006,12(4):4-7.
[12]吕联荣,姜道连,田春苗.电视原理及其应用技术[M].天津:天津大学出版社,2001.
[13]Guo X,Zhang W,Su J H,et al.Design of a focus-tunable capsule endoscope system[J].Acta Photonica Sinica,2015,44(5):0522004.郭鑫,张薇,速晋辉,等.可调焦胶囊内窥镜光学系统设计[J].光子学报,2015,44(5):0522004.
[14]Ye B,Wang L Q,Shi Y,et al.High resolution miniaturized CMOS camera module for medical electronic endoscope[J].Acta Photonica Sinica,2010,39(11):1951-1955.叶斌,王立强,石岩,等.高清医用电子内窥镜微型CMOS摄像模组(英文)[J].光子学报,2010,39(11):1951-1955.
[15]Ding Q,Wang H N.An imaging technique of microcapsule endoscope using a GRIN lens[J].Acta Photonica Sinica,2004,33(7):889-892.丁琴,王惠南.采用GRIN透镜的微胶囊内窥成像技术[J].光子学报,2004,33(7):889-892.
[16]Tseng Y C,Han P,Hsu H C,et al.A flexible FOV capsule endoscope design based on compound lens[J].Journal of Display Technology,2016,12(12):1-7.
[17]Ouyang M,Jeng W D.Design and analysis of radial imaging capsule endoscope(RICE)system[J].Optics Express,2011,19(5):4369-4383.