应用于口腔内窥成像系统的波前编码技术研究
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摘要
现代口腔窥镜分为照相型和显微型两类。照相型窥镜景深大、视场大,但细节分辨能力较弱;显微型窥镜能很好的分辨细节,但是景深小、视场小。针对需要一定视场和分辨率要求的口腔诊断场合,本文提出了一种波前编码技术口腔窥镜设计方案。在保持原有分辨率不降低的情况下达到拓展口腔窥镜景深的目的,并进行了光学编码成像系统、图像采集系统和编码图像恢复算法的研究,完成的主要工作如下:
根据口腔诊断要求,提出了一种波前编码口腔窥镜设计方案,该方案能够在保证对视场和分辨率要求的情况下,有效拓展景深。该方案在保证一定观测视场的前提下,能有效解决景深和分辨率的矛盾。
提出了一种基于规范相关系数的相位板参数优化方法,利用该方法获得了波前编码口腔窥镜光学系统离焦不变性曲线,确定了相位板归一化参数的区间,结合ZEMAX最后确定了三次相位板的结构参数,并且对比分析了传统光学系统和波前编码光学系统的特性,并最终完成了波前编码光学系统的设计和评价。
提出了一种嵌入图像采集系统设计方案,实现了图像的采集、存储和显示。改进了现有的波前编码图像退化函数估计方法,提出了一种波前编码退化模型,并实现了波前编码口腔窥镜的退化函数正确估计,采用维纳滤波的算法对辐条型分辨率板、口腔内部病灶等编码图像进行了图像恢复,复原后图像清晰。
The modern dental endoscope has two different types, photographic type and microscopic type. Compared with microscopic dental endoscope, the photographic dental endoscope performs better in the depth of field and the field of view. However, the most significant defect of photographic dental endoscope is the poor ability of resolution. Meanwhile, the microscopic dental endoscope has better ability of resolution. In order to solve the contradiction between the depth of field and the resolution in endoscopic imaging system, a new integrated optical imaging technology which is called as wavefront coding , is introduced in this dissertation. The main contents of this dissertation are as follows:
According to ral diagnostic requirements, a wavefront coding dental endoscope design is proposed, which can extend the depth of field and guarantee the field of view and resolution. Meanwhile ,the design can effectively solve contradiction between the depth of field and the resolution.
A phase mask optimized method based on the standardized correlation coefficient is introduced and the wavefront coding dental endoscope’s defocus invariance curve is accomplished. The range of phase plate normalized parameter is obtained. The specific phase mask normalized parameter is obtained by ZEMAX. Meanwhile the design and the evaluation of wavefront coding dental endoscope is accomplished.
A im age acquisition s ystem design is prop osed, which accom plish the im age acquisition, transmission and display.
The wavefront coding image degradation function estimation module is improved. The resolution board and oral lesion coded image is restored by wiener filtering algorithm based the degradation.
根据口腔诊断要求,提出了一种波前编码口腔窥镜设计方案,该方案能够在保证对视场和分辨率要求的情况下,有效拓展景深。该方案在保证一定观测视场的前提下,能有效解决景深和分辨率的矛盾。
提出了一种基于规范相关系数的相位板参数优化方法,利用该方法获得了波前编码口腔窥镜光学系统离焦不变性曲线,确定了相位板归一化参数的区间,结合ZEMAX最后确定了三次相位板的结构参数,并且对比分析了传统光学系统和波前编码光学系统的特性,并最终完成了波前编码光学系统的设计和评价。
提出了一种嵌入图像采集系统设计方案,实现了图像的采集、存储和显示。改进了现有的波前编码图像退化函数估计方法,提出了一种波前编码退化模型,并实现了波前编码口腔窥镜的退化函数正确估计,采用维纳滤波的算法对辐条型分辨率板、口腔内部病灶等编码图像进行了图像恢复,复原后图像清晰。
The modern dental endoscope has two different types, photographic type and microscopic type. Compared with microscopic dental endoscope, the photographic dental endoscope performs better in the depth of field and the field of view. However, the most significant defect of photographic dental endoscope is the poor ability of resolution. Meanwhile, the microscopic dental endoscope has better ability of resolution. In order to solve the contradiction between the depth of field and the resolution in endoscopic imaging system, a new integrated optical imaging technology which is called as wavefront coding , is introduced in this dissertation. The main contents of this dissertation are as follows:
According to ral diagnostic requirements, a wavefront coding dental endoscope design is proposed, which can extend the depth of field and guarantee the field of view and resolution. Meanwhile ,the design can effectively solve contradiction between the depth of field and the resolution.
A phase mask optimized method based on the standardized correlation coefficient is introduced and the wavefront coding dental endoscope’s defocus invariance curve is accomplished. The range of phase plate normalized parameter is obtained. The specific phase mask normalized parameter is obtained by ZEMAX. Meanwhile the design and the evaluation of wavefront coding dental endoscope is accomplished.
A im age acquisition s ystem design is prop osed, which accom plish the im age acquisition, transmission and display.
The wavefront coding image degradation function estimation module is improved. The resolution board and oral lesion coded image is restored by wiener filtering algorithm based the degradation.
引文
[1]胡敏,周建学,陈恒.口腔影像设备的应用[J].医疗卫生设备,2007,27(7):46~49.
[2]邓亲恺,现代医学仪器设计原理[M],北京:科学出版社,2004,10~25
[3]余学飞,医学电子仪器原理与设计[M],广州:华南理工大学出版社,2000,6~20
[4]俞仁康,寿文德,医学仪器原理与设计[M],上海:上海交通大学出版社,1990,5~18
[5]虞启琏,王琳,赵安宁等,医用光学仪器[M],天津:天津科学技术出版社,1988,3~30
[6]康晋,徐晓星,发展中的光纤照明技术[J],发光与照明,2003,2(2),15~18
[7]吕培军,王勇,赵闯,韩科,张震康.口腔诊所信息管理系统的研究与开发[J].中华口腔医学杂志, 2000,(05) .
[8]贺贤梁,陈根余,郑学侃.口腔医院门诊诊疗网络管理系统[J].上海微型计算机, 1997,(19) .
[9]张岚,刘丹阳.浅谈口腔医院的病案管理[J].中华医院管理杂志, 1995,(07) .
[10]殷操,张颂农,欧尧,颜继雄.口腔黏膜病内窥镜管理系统的开发与应用[J].临床口腔医学杂志, 2003,(11) .
[11]赵胜利.数字化诊断系统在口腔保健医疗中的应用[J].西南国防医药, 2004,(04) .
[12] Dowski E R, Kubala K. Reducing size, weight, and cost in a LWIR imaging system with Wavefront Coding[C]. Proc of SPIE,2004,5407:66-73.
[13]李湘宁,陈家璧,邹林儿.光学系统光阑应用的实例[J].大学物理, 2003,(06) .
[14]S.Prasad, T.C Torgersen. etal.. Hige-Resolution Imaging Using Integrated Optical Systems[J],International Journal on Imaging Systems and Technology,14(2):67-75, 2004
[15]S.Prasad,P.Pauca,R.Plemmons,T.Torgersen,andJ.vanderGracht.Engineer-ingthepupilphasetoimproveimagequality.InProc.AeroSenseConferenceonTechnologiesandSystemsforDefenseandSecurity,Orlando,2003.
[16] Dowski ER,Kubala K S. Modeling of w avefron t coded im ag ing system s[J] .2002, 4736 :116~126 .
[17] Bagheria S,Silveirab PEX,and Narayanswamy R. Design and optimization of the cubic-phase pupil for the extension of the depth of field of task-based imaging systems[C]. Proc of SPIE,2006,6311.
[18] FitzGerrell A R, Dowski E D, Jr,et al.Defocus transfer function for circularly symmetric pupils[J]. Applied Optics,1997,36(23):5796-5804.
[19]陈燕平,景深严拓波前编码系统理论及其应用研究[M]:[博士论文],杭州;浙江大学
[20] Josephson G E, Silveira P E X, Dowski E R. Analysis tools for com putational im aging systems[C]. Proc of SPIE, 2005,5817:34-44
[21] Dowski E R, Jr, Kubala K S. Modeling of wavefront coded imaging systems[C]. Proc of SPIE,2002,4736:116-126.
[22] Dowski E R, Jr,Cathey T W. Extended depth of field through wave-front coding[J]. Applied Optics, 1995, 34(11):1859-1866.
[23]吕乃光.傅里叶光学[M],北京:机械工业出版社,2006.165
[24] Zhang W Z. Point spread f unction characteristics analy sis of the wavefront coding system[J]. Optical Express,2007,15(4): 467-474.
[25] Dowski ER, Jr, Cormack R H,et al.Wavefront Coding: jointly optimized optical and digital imaging systems[C]. Proc of SPIE,2000,4041:114-120.
[26] Dowski E R, Jr, Johnson G E. Wavefront Coding: A modern method of achieving high performance and/or low cost imaging systems[C]. Proc of SPIE,1999,3779:137-145.
[27] Wach H B, Dowski E R, Jr, et al. Control of chromatic focal shift through wavefront coding[J]. Applied Optics, 1998, 37(23):5359-5367.
[28]维基百科. http://zh.wikipedia.org/wiki/Wikipedia
[29]张宇,罗二平,秦明新,等.数字化口腔内窥镜的设计与实现[J] .医疗卫生设备,2006 ,27 (11) :15217.
[30]韩振雷. CCD和CMOS图像传感器的异同剖析[J].影像技术, 2009,(04) .
[31]姚海根. CCD传感器的噪声源[J].出版与印刷, 2009,(03) .
[32]康厚俊. CMOS图像传感器与CCD的比较及发展现状[J].才智,2008,(09) .
[33]郁道银,谈恒英.工程光学[M].第2版.北京:机械工业出版社,2006.19-33
[34]张以谟.应用光学[M].第3版.北京:电子工业出版社,2008.349-352
[35]拉克斯.泛函分析[M].北京:人民邮电出版社,2010.33-34.
[36]燕云,陈家璧,潘超,庄松林.波前编码景深延拓和几何光学景深的关系[J].光学与光电技术,2009.6,7(3):75-76.
[37]钱峰.EZ-USB FX2单片机原理编程及应用[M].北京:北京航空航天大学出版社,2006,15.
[38] Cathey W T, Dowski E R. New paradigm for imaging systems[J]. Applied Optics, 2002, 41:6080-6092.
[39]付强.扩大景深的波前编码系统成像特性研究[M].:硕士论文,哈尔滨,哈尔滨工业大学.
[40]张欣.波前编码中的图像复原研究[D]:[博士论文],长春:长春光机所.
[41]Dowski E R, Jr,Cathey T W. Extended depth of field through wave-front coding[J]. Applied Optics, 1995, 34(11):1859-186
[42] Bradburn S, Cathey W T, Dowski E R, et al. Realization of invariance in optical-digital systems with wave-front coding[J]. Applied Optics,1997,36(35):9157-9166
[43] Mezouari S, Harvey A R. Wavefront coding for aberration compensation in thermal imaging systems[C]. Proc of SPIE,2001,4442:34-42.
[44] Plemmons R,Horvath M a nd Leonhardt E. Com putational imaging system s for iris recognition[C], Proc of SPIE,2004,5559,346-357.
[45] Morales F G, Tudela R, Borrull J F,et al. Pupil filters for wavefront coding: of f axis performance[C]. Proc of SPIE,2005,5962:371-377.
[46]勒中鑫.数字图像信息处理[M],北京,国防工业出版社,2003.298-327
[47]冈萨雷斯.数字图像处理[M](第二版),阮秋琦,阮宇智译.北京:电子工业出版社.2007.207-209
[48]谢义方.数字图像复原算法研究[D].[硕士学位论文].长沙:湖南大学电气与信息工程学院,2004.
[49]方超波前编码裂缝宽度测量系统的设计和图像恢复[D] [硕士学位论文]天津:天津大学,2008.
[2]邓亲恺,现代医学仪器设计原理[M],北京:科学出版社,2004,10~25
[3]余学飞,医学电子仪器原理与设计[M],广州:华南理工大学出版社,2000,6~20
[4]俞仁康,寿文德,医学仪器原理与设计[M],上海:上海交通大学出版社,1990,5~18
[5]虞启琏,王琳,赵安宁等,医用光学仪器[M],天津:天津科学技术出版社,1988,3~30
[6]康晋,徐晓星,发展中的光纤照明技术[J],发光与照明,2003,2(2),15~18
[7]吕培军,王勇,赵闯,韩科,张震康.口腔诊所信息管理系统的研究与开发[J].中华口腔医学杂志, 2000,(05) .
[8]贺贤梁,陈根余,郑学侃.口腔医院门诊诊疗网络管理系统[J].上海微型计算机, 1997,(19) .
[9]张岚,刘丹阳.浅谈口腔医院的病案管理[J].中华医院管理杂志, 1995,(07) .
[10]殷操,张颂农,欧尧,颜继雄.口腔黏膜病内窥镜管理系统的开发与应用[J].临床口腔医学杂志, 2003,(11) .
[11]赵胜利.数字化诊断系统在口腔保健医疗中的应用[J].西南国防医药, 2004,(04) .
[12] Dowski E R, Kubala K. Reducing size, weight, and cost in a LWIR imaging system with Wavefront Coding[C]. Proc of SPIE,2004,5407:66-73.
[13]李湘宁,陈家璧,邹林儿.光学系统光阑应用的实例[J].大学物理, 2003,(06) .
[14]S.Prasad, T.C Torgersen. etal.. Hige-Resolution Imaging Using Integrated Optical Systems[J],International Journal on Imaging Systems and Technology,14(2):67-75, 2004
[15]S.Prasad,P.Pauca,R.Plemmons,T.Torgersen,andJ.vanderGracht.Engineer-ingthepupilphasetoimproveimagequality.InProc.AeroSenseConferenceonTechnologiesandSystemsforDefenseandSecurity,Orlando,2003.
[16] Dowski ER,Kubala K S. Modeling of w avefron t coded im ag ing system s[J] .2002, 4736 :116~126 .
[17] Bagheria S,Silveirab PEX,and Narayanswamy R. Design and optimization of the cubic-phase pupil for the extension of the depth of field of task-based imaging systems[C]. Proc of SPIE,2006,6311.
[18] FitzGerrell A R, Dowski E D, Jr,et al.Defocus transfer function for circularly symmetric pupils[J]. Applied Optics,1997,36(23):5796-5804.
[19]陈燕平,景深严拓波前编码系统理论及其应用研究[M]:[博士论文],杭州;浙江大学
[20] Josephson G E, Silveira P E X, Dowski E R. Analysis tools for com putational im aging systems[C]. Proc of SPIE, 2005,5817:34-44
[21] Dowski E R, Jr, Kubala K S. Modeling of wavefront coded imaging systems[C]. Proc of SPIE,2002,4736:116-126.
[22] Dowski E R, Jr,Cathey T W. Extended depth of field through wave-front coding[J]. Applied Optics, 1995, 34(11):1859-1866.
[23]吕乃光.傅里叶光学[M],北京:机械工业出版社,2006.165
[24] Zhang W Z. Point spread f unction characteristics analy sis of the wavefront coding system[J]. Optical Express,2007,15(4): 467-474.
[25] Dowski ER, Jr, Cormack R H,et al.Wavefront Coding: jointly optimized optical and digital imaging systems[C]. Proc of SPIE,2000,4041:114-120.
[26] Dowski E R, Jr, Johnson G E. Wavefront Coding: A modern method of achieving high performance and/or low cost imaging systems[C]. Proc of SPIE,1999,3779:137-145.
[27] Wach H B, Dowski E R, Jr, et al. Control of chromatic focal shift through wavefront coding[J]. Applied Optics, 1998, 37(23):5359-5367.
[28]维基百科. http://zh.wikipedia.org/wiki/Wikipedia
[29]张宇,罗二平,秦明新,等.数字化口腔内窥镜的设计与实现[J] .医疗卫生设备,2006 ,27 (11) :15217.
[30]韩振雷. CCD和CMOS图像传感器的异同剖析[J].影像技术, 2009,(04) .
[31]姚海根. CCD传感器的噪声源[J].出版与印刷, 2009,(03) .
[32]康厚俊. CMOS图像传感器与CCD的比较及发展现状[J].才智,2008,(09) .
[33]郁道银,谈恒英.工程光学[M].第2版.北京:机械工业出版社,2006.19-33
[34]张以谟.应用光学[M].第3版.北京:电子工业出版社,2008.349-352
[35]拉克斯.泛函分析[M].北京:人民邮电出版社,2010.33-34.
[36]燕云,陈家璧,潘超,庄松林.波前编码景深延拓和几何光学景深的关系[J].光学与光电技术,2009.6,7(3):75-76.
[37]钱峰.EZ-USB FX2单片机原理编程及应用[M].北京:北京航空航天大学出版社,2006,15.
[38] Cathey W T, Dowski E R. New paradigm for imaging systems[J]. Applied Optics, 2002, 41:6080-6092.
[39]付强.扩大景深的波前编码系统成像特性研究[M].:硕士论文,哈尔滨,哈尔滨工业大学.
[40]张欣.波前编码中的图像复原研究[D]:[博士论文],长春:长春光机所.
[41]Dowski E R, Jr,Cathey T W. Extended depth of field through wave-front coding[J]. Applied Optics, 1995, 34(11):1859-186
[42] Bradburn S, Cathey W T, Dowski E R, et al. Realization of invariance in optical-digital systems with wave-front coding[J]. Applied Optics,1997,36(35):9157-9166
[43] Mezouari S, Harvey A R. Wavefront coding for aberration compensation in thermal imaging systems[C]. Proc of SPIE,2001,4442:34-42.
[44] Plemmons R,Horvath M a nd Leonhardt E. Com putational imaging system s for iris recognition[C], Proc of SPIE,2004,5559,346-357.
[45] Morales F G, Tudela R, Borrull J F,et al. Pupil filters for wavefront coding: of f axis performance[C]. Proc of SPIE,2005,5962:371-377.
[46]勒中鑫.数字图像信息处理[M],北京,国防工业出版社,2003.298-327
[47]冈萨雷斯.数字图像处理[M](第二版),阮秋琦,阮宇智译.北京:电子工业出版社.2007.207-209
[48]谢义方.数字图像复原算法研究[D].[硕士学位论文].长沙:湖南大学电气与信息工程学院,2004.
[49]方超波前编码裂缝宽度测量系统的设计和图像恢复[D] [硕士学位论文]天津:天津大学,2008.