In-orbit autonomous adjusting method of optical remote sensing satellite camera imaging parameter

Abstract

The invention provides an in-orbit autonomous adjustment method of the imaging parameter of an optical remote sensing satellite camera. The method is used for adaptively adjusting the dynamic range of an optical remote sensing satellite camera to ensure obtaining of an image with optimum gray scale and layering quality. The method includes the following steps: acquiring the solar elevation angle when a shot subject is imaged by a spacecraft before or during imaging operation, and carrying out validity judgment to select suitable imaging parameters; periodically querying a relationship table of the solar elevation angle and a gain grade through a central processing computer in order to obtain a camera gain grade parameter value matching with the selected suitable imaging parameter; and sending the camera gain grade parameter value to a camera controller in a predetermined format in order to realize corresponding setting of an imaging circuit. The method can very well meet requirements of flexible adjustment of satellite-mounted CCD camera imaging gain and integral grade with the energy, can be widely applied to imaging parameter calculation of the optical remote sensing satellite, and has high practicality and generality.

Description

technical field [0001] The present invention relates to the field of optical imaging, in particular to a method for on-orbit autonomous adjustment of imaging parameters of an optical remote sensing satellite camera, in particular to an on-orbit adaptive adjustment of imaging parameters of a spaceborne charge-coupled device (CCD) camera Methods. Background technique [0002] The main criterion for evaluating optical remote sensing satellites is the image quality of the satellite. The observation dynamic range of the spaceborne camera is an important performance index for evaluating the quality of the satellite image. The dynamic range refers to the maximum response of the imaging system to the input signal without saturation. The ratio of the output amplitude to the smallest resolvable signal amplitude. The larger the dynamic range, the more layers that represent resolution, the greater the amount of information, and the better the visual effect of the image. If the dynamic...

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Problems solved by technology

[0011] In order to solve the problems existing in the prior art, the present invention provides a space-borne CCD camera gain and integral series on-orbit autonomous adjustment scheme, which solves the dynamic response problem of the camera adapting to different entrance pupil energies in different seasons and different observation areas , so as to reasonably adjust the dynamic range of the camera to ensure the best image quality in grayscale and layers

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