Image motion compensation method of high resolution space camera’s imaging with pitch angle

Li Weixiong; Yan Dejie; Wang Dong

In order to make the high resolution space Time Delay and Integration(TDI) CCD camera adapt to the satellite pitch attitude angle and enhance real-time ability of space remote sensing, the influence of satellite's pitch angle on the imaging of high resolution space cameras was analyzed. The optical projection method was used to qualitatively analyze the differences of image motion velocities among different fields of view when imaging with pitch angles. Generating principle of image with traverse image motion was promoted according to the operation mode of TDI CCD. The model of recovering image with the traverse motion image was built, and the simulation experiment and its algorithm accuracy analysis were accomplished. The analysis result shows that the larger the pitch angle of satellite is, the more different the image motion velocity of various fields of view is. From the emulational experiment and accuracy analysis, it is seen that image without traverse image motion could be gotten by the method of image recovery with traverse image motion, and the higher the collection digit of image with traverse image motion is, the smaller the error of grew value is. The ability to adapt the pitch angle of satellites is enhanced by the method of recovery of image with traverse image motion, and the capability of agile imaging of TDI CCD space camera is greatly improved.

1. Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China

Received Date: 2013-01-02

Rev Recd Date: 2013-02-15

Publish Date: 2013-09-25

Key words:

Abstract: In order to make the high resolution space Time Delay and Integration(TDI) CCD camera adapt to the satellite pitch attitude angle and enhance real-time ability of space remote sensing, the influence of satellite's pitch angle on the imaging of high resolution space cameras was analyzed. The optical projection method was used to qualitatively analyze the differences of image motion velocities among different fields of view when imaging with pitch angles. Generating principle of image with traverse image motion was promoted according to the operation mode of TDI CCD. The model of recovering image with the traverse motion image was built, and the simulation experiment and its algorithm accuracy analysis were accomplished. The analysis result shows that the larger the pitch angle of satellite is, the more different the image motion velocity of various fields of view is. From the emulational experiment and accuracy analysis, it is seen that image without traverse image motion could be gotten by the method of image recovery with traverse image motion, and the higher the collection digit of image with traverse image motion is, the smaller the error of grew value is. The ability to adapt the pitch angle of satellites is enhanced by the method of recovery of image with traverse image motion, and the capability of agile imaging of TDI CCD space camera is greatly improved.

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Image motion compensation method of high resolution space camera’s imaging with pitch angle

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