Dynamic modulation transfer function analysis and research of image rotation for aerial camera

	Dynamic modulation transfer function analysis and research of image rotation for aerial camera
	Liu, C.; Y. Ding; D. Tian; Y. Du and C. Sun
	2017
发表期刊	Guangxue Xuebao/Acta Optica Sinica
卷号	37 期号:2
摘要	Aerial camera causes image rotation problem in the process of rotating scanning reflector imaging, which leads to image blur and degradation of image quality, so image rotation compensation system is essential for aerial camera. At present, the distinguishing image blur by human eyes and synchronization control accuracy by electrical machine are used to evaluate compensation performance of image rotation, but the image quality could not be evaluated objectively and accurately. In order to establish the direct relationship between imaging quality of aerial camera and other index of rotating compensation system, the dynamic modulation transfer function (MTF) based on polar coordinate is proposed. A new method combined with the slanted-edge method and blur path method is proposed to measure the dynamic MTF of rotation image motion of the aerial camera. The rotating dynamic imaging experiments are designed with sector target, and the image dynamic MTF calculated values are obtained using the rotating dynamic MTF and slanted-edge method. The image dynamic measured MTF values are obtained based on image fuzzy path. Experimental results show that, when rotate table with variable angular velocities from 20 ()/s to 300 ()/s, the spatial frequency is less than first zero frequency of rotating dynamic MTF, and the two dynamic MTF curves are approximately coincide. Thus the correctness of the rotating dynamic MTF is demonstrated. When the spatial frequency is less than 0.7 of zero frequency, the maximum values and mean values of dynamic MTF relative errors are less than 6%, 2% respectively, thus the accuracy of the measurement method is proved. 2017, Chinese Lasers Press. All right reserved.
收录类别	ei
语种	中文
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/59061
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Liu, C.,Y. Ding,D. Tian,et al. Dynamic modulation transfer function analysis and research of image rotation for aerial camera[J]. Guangxue Xuebao/Acta Optica Sinica,2017,37(2).
APA	Liu, C.,Y. Ding,D. Tian,&Y. Du and C. Sun.(2017).Dynamic modulation transfer function analysis and research of image rotation for aerial camera.Guangxue Xuebao/Acta Optica Sinica,37(2).
MLA	Liu, C.,et al."Dynamic modulation transfer function analysis and research of image rotation for aerial camera".Guangxue Xuebao/Acta Optica Sinica 37.2(2017).

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