Modulation transfer function (MTF) is a key parameter for assessment of the imaging performance of in-flight optical sensors. This study focuses on the influences of major factors on the accuracy of knife-edge method by using theoretical analysis and simulation experiments. The analyzed factors include atmosphere, the incline angle of target, the contrast and random noise of target, the edge detection accuracy, and the ERF curve-fitting model. Accuracies in MTF assessment under different simulation parameters are also analyzed. The analysis results are instructive for implementation of on-orbit MTF assessment using knife-edge method.
LIU Liang
,
LI Xian-Bin
,
JIANG Xiao-Guang
,
WU Wei
,
ZHANG Bao-Jun
,
YANG Dian-Hua
. Accuracy of knife-edge method in MTF assessment[J]. Journal of University of Chinese Academy of Sciences, 2012
, (6)
: 786
-792
.
DOI: 10.7523/j.issn.2095-6134.2012.6.010
[1] Leger D, Viallefont F, Hillairet, et al. In-flight refocusing and MTF assessment of SPOT5 HRG and HRS cameras[J]. Proceeding of SPIE, 2003,4884: 224-231.
[2] Leger D, Duffaut J, Robinet F. MTF measurement using spotlight[J]. IEEE Transactions on Geoscience and Remote Sensing, 1994,4: 2010-2012.
[3] Li X B, Jiang X G, Tang L L. On-orbit MTF estimation methods for satellite sensors [C]//Proceedings of ISPRS WG VII/6 Workshop. Chengdu, China. 2007: 348-352.
[4] Leger D, Viallefont F, Hillairet, et al. In-flight refocusing and MTF assessment of SPOT5 HRG and HRS cameras [DB/OL].(2002) [2011-09-20]. http://www-mip.onera.fr/pirrene/references_docs/leger_et_al_SPIE_2002.pdf (accessed 17 May 2008).
[5] Nelson N R, Barry P S. Measurement of Hyperion MTF from on-orbit scenes [C]//Procedings of International Geosciences and Remote Sonsing Symposium. 2001,7: 2967-2969.
[6] Helder D, Choi T, Rangaswamy M. In-flight characterization of spatial quality using point spread function [C]//Post-launch Calibration of Satellite Sensors. USA: Taylor & Francis Group, 2004: 151-170.
[7] Rangaswamy M K. Quickbird II two-dimensional on-orbit modulation transfer function analysis using convex mirror array [D]. South Dakota State University, 2003.
[8] Schowengerdt R A, Colwell J E, Measurement of the HYDICE System MTF from Flight Imagery[J]. Proceeding of SPIE, 1996,2821: 127-123.
[9] Bensebaa K, Banon, G J F, Fonseca L M G. On-orbit spatial resolution estimation of CBERS-1 CCD camera [C]//Proceeding of International Conference on Image and Graphics (ICIG 2004). 2004: 576-579.
[10] Bensebaa K, Banon G J F, Fonseca L M G,et al. On-orbit spatial resolution estimation of CBERS-2 imaging system using ideal edge target [J/OL].Proceedings of SITIS, 2006: 466-475. (2006-06) [2011-10-25]. http://mtc-m18.sid.inpe.br/rep-/sid.inpe.br/ePrint@80/2006/09.21.20.22.
[11] 顾行发, 李小英, 闵祥军,等. CBERS-02卫星CCD相机MTF在轨测量及图像MTF补偿[J]. 中国科学(E辑), 2005(21): 26-40.
[12] Li X B, Jiang X G, Zhou C J, et al. An analysis of knife-edge method for on-orbit MTF estimation of optical sensors[J]. INT J of Remote Sensing, 2010,31(17): 4995-5011.
[13] Dong T, Dong H Y. Research on the restoration of atmospheriacally blurred image based on atmospherical modulation transfer function[J]. Transactions of Shenyang Ligong University, 2006,25(5): 39-42(in Chinese). 董涛, 董慧颖. 基于大气调制传递函数的天气退化图像复原方法研究[J]. 沈阳理工大学学报, 2006, 25(5):39-42.
[14] 陈世平. 空间相机设计与试验[M]. 北京: 宇航出版社, 2003.
