医用内窥镜质量检测中的图像识别技术研究

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1、密级公开分类号ＴＰ３９１：ｍ＇ＡＮＡＬＵＮＸＩＴＥＣＨＮＯＬＯＧＩＣＩＶＥＲＳＩＴＹ硕士学位论文ｍ医用内窥镜质量检测中的图像识别技术研究作者：＿＿指导教师：白万民．申请学位学科：软件工程２０１８年５月４日采用文中所提的测量算法对QM423T型号的医用内窥镜进行光学性能进行大量检测，其结果表明：畸变率和最大视场角测量值均在医用内窥镜标准的测量误差范围内，测量结果具有重复性好、检测效率高，对实际应用有很好的参考价值。关键字：医用内窥镜；

2、畸变率；最大视场角；椭圆拟合；同心圆检测matchingmethod.Usethemethodofgradientsegmentalarcedgepointdetectiontodetecteachellipseedgeandusetheleastsquaremethodtofitellipsedirectly.Accordingthatthedistanceofpointswhicharetobefittedandpointsontheellipseislessthanthesetthresh

3、oldvaluemethod,judgetheresultofthefitting,andthencalculatethedistortionrate.Inthispaper,weusedQM423TmedicalendoscopetodetecttheaberrationrateandmaximumfieldAnglewiththeproposedalgorithm.Measurethedistortionrateoffiveellipseontheendoscopicdistortionbo

4、ard,theaberrationratevalueofcircleindifferentpositionrespectivelywhicharetheupperleft(0.8974),theupperright(0.8765),center(0.9348),lowerleft(0.8930),lowerright(0.9079)aremeetingtherequirementofmedicalspeculumdistortionrate.Measuringfivedifferentmedic

5、alendoscopeconcentricmarkplate,themaximumnumberofviewingangleare:66.750,66.750,66.750,66.50,66.50,measurementsaremeetthestandardofmedicalendoscopebiggestviewanglemeasurementaccuracy.Theresultsshowthatthedistortionrateandthemaximumviewinganglemeasurem

6、entarewithinthescopeofmedicalendoscopestandarderrorofmeasurementandthemeasurementresulthasagoodrepeatability,highdetectionefficiencyandhasgreatreferencevalueinpracticalapplication.KeyWords:Medicalendoscope;Distortionrate;Maximumangleofview;Ellipsefit

7、ting;Concentriccircledetection目录1绪论...........................................................................................................................................11.1选题意义及背景.................................................................

8、.............................................11.2医用内窥镜系统..............................................................................................................21.2.1医用内窥镜的基本结构....................................................................