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	Modulation transfer function measurement of sampled imaging systems in field test (EI CONFERENCE) 会议论文 OAI收割 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China 作者: Yang L.; Zhang J.; Zhang J.; Zhang J.; Wang J. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 A digital mirror device (DMD) based light projector was developed as the target generator in modulation transfer function (MTF) measurement. In order to overcome the sampling-scene phase effect in MTF measurement of sampled imaging systems a method using random targets is introduced to yield a phase-averaged MTF. The main potential problem of implementing this method is the fact that the stationary assumption of the random targets may be vitiated in practical measurement especially in field test due to the ill condition. We provide an efficient model-independent way of analyzing and isolating the spectral contents arising from these additional contributions to MTF measurement. Algorithms with adaptive parameter selection were also developed for spectral estimation of the test image in order to overcome the challenge brought by the size limit of the test matrices for one certain field of view derived from the isoplantic region. The MTF measurement of a CCD video imager is used to demonstrate the measurement technique and illustrate the benefits over other methods. In order to validate the results comparisons have been made between MTF measurements of imager implemented using this method and bar target direct measurements. 2010 Copyright SPIE - The International Society for Optical Engineering.
	Modulation transfer function measurement technique for image sensor arrays (EI CONFERENCE) 会议论文 OAI收割 6th International Symposium on Precision Engineering Measurements and Instrumentation, August 8, 2010 - August 11, 2010, Hangzhou, China 作者: Jiang H. 收藏 \| 浏览/下载：22/0 \| 提交时间：2013/03/25 A new technique is demonstrated for measurement of modulation transfer function (MTF) on image sensor arrays. Fourier analysis of a low frequency bar target pattern is used to extract MTF at odd harmonics of a target pattern frequency up to and beyond Nyquist. The technique is particularly useful for linear image arrays (either conventional linescan or time-delay-integration devices) where conventional slanted-edge technique is not always applicable. The technique is well suited to simple implementation and can provide live presentation of the MTF curve which helps to ensure optimal alignment conditions are achieved. Detailed analysis of the technique and demonstration of experimental results are presented. 2010 SPIE.
	An automatic mtf measurement method for remote sensing cameras 期刊论文 iSwitch采集 Optoelectronics and advanced materials-rapid communications, 2009, 卷号: 3, 期号: 7, 页码: 650-654 作者: Wang, Tianhui; Li, Shengyang; Li, Xuzhi 收藏 \| 浏览/下载：30/0 \| 提交时间：2019/05/10 Mtf measurement Optical imaging sensors Straight line detection
	Influence of the TDI CCD camera takes pictures when high resolution satellite lateral swaying (EI CONFERENCE) 会议论文 OAI收割 2009 IEEE International Conference on Mechatronics and Automation, ICMA 2009, August 9, 2009 - August 12, 2009, Changchun, China 作者: Zhang L.; Zhang L.; Sun Z. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 When the satellite was swinging and taking lateral imaging the TDI CCD pixel photovoltaic charge purses transferred velocity not matched with the image motion velocity. According to the requirement of high-resolution satellite which was taking lateral imaging at a low orbit the factors that bring about the unmatched phenomenon were analysed inclusive of the Earth's rotation the Earth curvature satellite attitude change measurement error and the installation error etc. Image motion errors caused by various factors were analysed and solved and the different characters of image motion errors were synthesized. Finally the total errors on the impact of imaging system MTF was analyzed. 2009 IEEE.
	MTF measurement based on interactive live-wire edge extraction 会议论文 OAI收割 Computational Science - ICCS 2007, Pt 2, Proceedings, Berlin Liu, Peng; Liu, Dingsheng; Huang, Fang 收藏 \| 浏览/下载：19/0 \| 提交时间：2014/12/07 MTF measurement interactive live-wire edge extraction sharp edge SEGMENTATION