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Modified slanted-edge method for camera modulation transfer function measurement using nonuniform fast Fourier transform technique
Duan, Yaxuan1,2; Xu, Songbo1; Yuan, Suochao1,3; Chen, Yongquan1; Li, Hongguang1; Da, Zhengshang1; Gao, Limin1
Department先进光学仪器研究室
2018
Source PublicationOPTICAL ENGINEERING
ISSN0091-3286
Volume57Issue:1
Contribution Rank1
Abstract

ISO 12233 slanted-edge method experiences errors using fast Fourier transform (FFT) in the camera modulation transfer function (MTF) measurement due to tilt angle errors in the knife-edge resulting in nonuniform sampling of the edge spread function (ESF). In order to resolve this problem, a modified slanted-edge method using nonuniform fast Fourier transform (NUFFT) for camera MTF measurement is proposed. Theoretical simulations for images with noise at a different nonuniform sampling rate of ESF are performed using the proposed modified slanted-edge method. It is shown that the proposed method successfully eliminates the error due to the nonuniform sampling of the ESF. An experimental setup for camera MTF measurement is established to verify the accuracy of the proposed method. The experiment results show that under different nonuniform sampling rates of ESF, the proposed modified slanted-edge method has improved accuracy for the camera MTF measurement compared to the ISO 12233 slanted-edge method. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)

KeywordModulation Transfer Function Numerical Approximation And Analysis Nonuniform Sampling
DOI10.1117/1.OE.57.1.014103
Indexed BySCI ; EI
Language英语
WOS IDWOS:000424272600036
EI Accession Number20180304652521
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.opt.ac.cn/handle/181661/30803
Collection先进光学仪器研究室
Affiliation1.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Xian, Shaanxi, Peoples R China;
2.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing, Peoples R China;
3.Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Opt Engn, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Duan, Yaxuan,Xu, Songbo,Yuan, Suochao,et al. Modified slanted-edge method for camera modulation transfer function measurement using nonuniform fast Fourier transform technique[J]. OPTICAL ENGINEERING,2018,57(1).
APA Duan, Yaxuan.,Xu, Songbo.,Yuan, Suochao.,Chen, Yongquan.,Li, Hongguang.,...&Gao, Limin.(2018).Modified slanted-edge method for camera modulation transfer function measurement using nonuniform fast Fourier transform technique.OPTICAL ENGINEERING,57(1).
MLA Duan, Yaxuan,et al."Modified slanted-edge method for camera modulation transfer function measurement using nonuniform fast Fourier transform technique".OPTICAL ENGINEERING 57.1(2018).
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