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A method and system for fast and robust image stray light suppression

An image and stray light technology, applied in the field of satellite attitude control, can solve problems such as poor real-time performance, high complexity, and failure to meet application requirements, and achieve the effects of low impact, low complexity, and high precision

Active Publication Date: 2018-12-18
BEIJING INST OF CONTROL ENG
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Problems solved by technology

[0009] The complexity of the above-mentioned prior art is high, and when the algorithm processing based on the embedded platform requires high-frequency output, the real-time performance is poor and cannot meet the application requirements

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  • A method and system for fast and robust image stray light suppression
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  • A method and system for fast and robust image stray light suppression

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Embodiment Construction

[0053] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0054] When the star sensor is in orbit, it is susceptible to stray light interference caused by reflected sunlight from the satellite body and solar panels. When the original star map taken by the stellar gyro sensor is disturbed by stray light, a stray light interference map will be formed. Because the stray light interference image contains both stray light and star points, the image content of star points is characterized by high frequency, and the image content of stray light is characterized by low frequency. A fast and robust image stray light suppression method, the principle of which is to obtain a low-frequency image, and after subtracting the low-frequency image from the image interfered by stray light, the high-frequency im...

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Abstract

The invention relates to a method and system for fast and robust image stray light suppression, which adopts a method of averaging pixels around current pixels to obtain background stray light images,wherein the complexity is low. At the same time, the background stray light image is calculated directly by mathematical decomposition process, which is simple and suitable for the operation of an embedded platform. Under the requirement of high-frequency processing (50Hz), a simplified method of solving the low-frequency information is adopted and the low-frequency information of each pixel is obtained by weighting the surrounding pixel values by a simplified method. In this way, the low-frequency information of the image, that is, background stray light image, can be obtained accurately, and the high-frequency star point information can be obtained conveniently. The whole calculation process in the program only needs adding and subtracting and shift operations, and is convenient for theimplementation of the embedded platform.

Description

technical field [0001] The invention relates to a fast and robust image stray light suppression method and system, belonging to the field of satellite attitude control. Background technique [0002] When the star sensor is in orbit, it is susceptible to stray light interference caused by reflected sunlight from the satellite body and solar panels. When the original star map taken by the stellar gyro sensor is disturbed by stray light, a stray light interference map will be formed. In the stray light interference image, the gray level fluctuates greatly, and the existing threshold method cannot be used to extract the star point, and thus the star point recognition and attitude calculation cannot be completed. Therefore, it is necessary to process the star map (the stray light interference map) under the stray light environment to remove the stray light interference. [0003] The high-frequency star sensor is required to meet the processing requirements of 100Hz, and the alg...

Claims

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Application Information

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IPC IPC(8): G06T5/00
CPCG06T2207/20024G06T2207/20004G06T5/70
Inventor 刘达郝云彩张春明米强顾营迎钟红军
Owner BEIJING INST OF CONTROL ENG
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