编码孔径成像技术
合集下载
相关主题
- 1、下载文档前请自行甄别文档内容的完整性，平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益，请联系客服反馈,我们会尽快为您处理(人工客服工作时间：9:00-18:30)。
Coded Aperture Imaging Technology
mentor： name： major：Radiation protection and environmental protection
Why a coded aperture?
The pinhole camera and coded aperture camera
P（x, y） O( x, y) A( x, y) N ( x, y)
Decoding:computer post-processing
Decoding process:
O( x, y) P( x, y) G( x, y)
O( x, y ) O( x, y ) A( x, y ) G ( x, y ) N ( x, y ) G ( x, y )
m-sequence
Coded aperture imaging in a nutshell
(pictorial
summary of a coded aperture camera concept)
Encoding the signal:object projection
The intensity distribution of the projected image on the detector:
References
• • • • • • • • • • • [1]Roberto Accorsi. Desigen of Near-Field Coded Aperture Cameras for High-Resolution Medical and Industrial Gamma-Ray Imaging, PhD thesis, Massachusetts Institute of Technology,2001. [2]Charalambous P M, Dean A J, Stephen J B, et al. Aberrations in gammaray coded aperture imaging[J]. Applied optics, 1984, 23(22): 4118-4123. [3]Doucet S, LaRochelle S. Device for tailoring the chromatic dispersion of a light signal: U.S. Patent 7,251,396[P]. 2007-7-31. [4]程丽红. X 光编码孔径成像理论及实验研究[D]. 大连理工大学, 2006. [5]洪俊杰. γ 相机中编码孔径准直器设计及数字图像重建[D]. 硕士学位论文. 华中科技大学, 2006. [6]田晓东. 环形编码孔径成像技术及数字重建[D]. 大连理工大学, 2003. [7]孙萍, 谢敬辉, 周元林. 编码孔径和解码孔径的设计[J]. 仪器仪表学报, 2004, 25(3): 321-324. [8]洪俊杰, 戎军艳, 王人松, 等. 近场编码孔径成像的数据校正[J]. 核电子学与 探测技术, 2007, 27(4): 764-767. [9]程丽红, 田晓东, 谢存. 编码孔径成像系统中的点扩散函数[J]. 应用光学, 2005, 26(5): 13-16
O( x, y) ( x, y) N ( x, y) G( x, y) O( x, y) N ( x, y)
(a sample of the process from the object,through the mask,to projection and reconstruction)
• 正文内容介绍
The classic methods of 2d imaging. pinhole camera geometry
Coded aperture imaging. projection geometry
About the coded mask
Modified Uniformly Redundant Array
The experiment and result comparison
(coded apertures used for thyroid phantom simulations)
Summary
• high resolution and high signal-to-noise ratio • two steps: encoding process and decoding process • MURA and m-sequence can get better imaging effects • Possible application in household camera in the future • shortcoming：increase the complexity of the imaging process
·源自文库
THANK YOU!
mentor： name： major：Radiation protection and environmental protection
Why a coded aperture?
The pinhole camera and coded aperture camera
P（x, y） O( x, y) A( x, y) N ( x, y)
Decoding:computer post-processing
Decoding process:
O( x, y) P( x, y) G( x, y)
O( x, y ) O( x, y ) A( x, y ) G ( x, y ) N ( x, y ) G ( x, y )
m-sequence
Coded aperture imaging in a nutshell
(pictorial
summary of a coded aperture camera concept)
Encoding the signal:object projection
The intensity distribution of the projected image on the detector:
References
• • • • • • • • • • • [1]Roberto Accorsi. Desigen of Near-Field Coded Aperture Cameras for High-Resolution Medical and Industrial Gamma-Ray Imaging, PhD thesis, Massachusetts Institute of Technology,2001. [2]Charalambous P M, Dean A J, Stephen J B, et al. Aberrations in gammaray coded aperture imaging[J]. Applied optics, 1984, 23(22): 4118-4123. [3]Doucet S, LaRochelle S. Device for tailoring the chromatic dispersion of a light signal: U.S. Patent 7,251,396[P]. 2007-7-31. [4]程丽红. X 光编码孔径成像理论及实验研究[D]. 大连理工大学, 2006. [5]洪俊杰. γ 相机中编码孔径准直器设计及数字图像重建[D]. 硕士学位论文. 华中科技大学, 2006. [6]田晓东. 环形编码孔径成像技术及数字重建[D]. 大连理工大学, 2003. [7]孙萍, 谢敬辉, 周元林. 编码孔径和解码孔径的设计[J]. 仪器仪表学报, 2004, 25(3): 321-324. [8]洪俊杰, 戎军艳, 王人松, 等. 近场编码孔径成像的数据校正[J]. 核电子学与 探测技术, 2007, 27(4): 764-767. [9]程丽红, 田晓东, 谢存. 编码孔径成像系统中的点扩散函数[J]. 应用光学, 2005, 26(5): 13-16
O( x, y) ( x, y) N ( x, y) G( x, y) O( x, y) N ( x, y)
(a sample of the process from the object,through the mask,to projection and reconstruction)
• 正文内容介绍
The classic methods of 2d imaging. pinhole camera geometry
Coded aperture imaging. projection geometry
About the coded mask
Modified Uniformly Redundant Array
The experiment and result comparison
(coded apertures used for thyroid phantom simulations)
Summary
• high resolution and high signal-to-noise ratio • two steps: encoding process and decoding process • MURA and m-sequence can get better imaging effects • Possible application in household camera in the future • shortcoming：increase the complexity of the imaging process
·源自文库
THANK YOU!