A high dynamic star sensor image processing control method
A technology of star sensor and control method, which is applied in image data processing, image enhancement, image analysis, etc., can solve problems such as affecting the validity of star sensor data, inability to effectively extract star points, and blurring of star point imaging. , to ensure data validity, shorten trailing length, and improve dynamic performance.
Active Publication Date: 2021-12-07
SHANGHAI AEROSPACE CONTROL TECH INST
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Problems solved by technology
The relative motion between the star and the detector causes blurring and smearing of the star point imaging, which makes the common image processing method unable to effectively extract the star point, and ultimately affects the data validity of the star sensor
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[0041] based on the following Figure 1 ~ Figure 4 , specifically explain the preferred embodiment of the present invention.
[0042] like figure 1 As shown, the present invention provides a high dynamic star sensor image processing control method, comprising the following steps:
[0043] Step S1, angular velocity estimation.
[0044] The control of exposure time is based on the angular velocity.
[0045] There are two main sources of angular velocity: the independent prediction of the star sensor and the auxiliary angular velocity information of the subsystem.
[0046] The independent prediction of the star sensor can be based on the attitude calculation information, or directly through the star point image information. The former is mainly used in star-tracking mode, while the latter involves all-sky identification mode.
[0047] The priority of the three sources is as follows: auxiliary angular velocity information of the sub-system, independent prediction of the star ...
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A high dynamic star sensor image processing control method, the star sensor independently predicts the angular velocity according to the star point feature information, calculates the optimal exposure time according to the angular velocity, estimates the trailing length of the star point according to the angular velocity and the optimal exposure time, and adaptively Adjust the size of the tracking window corresponding to the star point, track the star point with an adaptive window, and use the background estimation method to preprocess the image in the window to obtain the feature information of the star point. The invention realizes independent adjustment, can effectively suppress star point smearing, greatly improves the star point extraction rate, maximizes the signal-to-noise ratio of star point imaging, ensures the validity of star sensor data, and ultimately improves the dynamic performance of the star sensor.
Description
technical field [0001] The invention relates to a high dynamic star sensor image processing control method. Background technique [0002] Dynamic performance is a major bottleneck in the development of star sensors. The relative motion of the star and the detector causes the blurring and smearing of the star point imaging, which makes the common image processing method unable to effectively extract the star point, and ultimately affects the data validity of the star sensor. [0003] In fact, improving the dynamic performance of the star sensor not only depends on the image preprocessing algorithm, but also needs to consider the aspects of star tracking prediction, imaging control, image window acquisition, star point extraction, etc., which together constitute a high dynamic star sensor image processing system. Star tracking means that after the star sensor has completed the all-day recognition, it has prior information, and can deduce the next frame of data based on the pr...
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IPC IPC(8): G01C21/02G06T5/00G06T7/136
CPCG01C21/02G06T7/136G06T5/70
Inventor 余路伟毛晓楠高原练达杨元钊李新鹏金荷左乐高文杰张磊
Owner SHANGHAI AEROSPACE CONTROL TECH INST