Method for rapidly processing image of APS sun sensor

Abstract

The invention relates to a method for rapidly processing the image of an APS sun sensor by an FPGA according to the following steps: establishing two shift registers and six register sets in the FPGA, wherein the two shift registers are used for storing label values, the six register sets are used for storing parameters obtained with the centroid method; establishing three processes in the FPGA to finish merging equivalent label regions and calculating the coordinate value in the energy center, wherein the three processes include an image label process P1, an image centroid method process P2 and a process P3; starting an image collecting process and an image processing process simultaneously by making full use of the characteristic of parallel processing in the FPGA, finishing extracting the effective data of one frame of image after finishing collecting the image, identifying the collected image of the APS sun sensor with the method for identifying 8 adjacent connected regions in the process of processing the image, obtaining the sun image which is formed on an image sensor through a light-ray introducing device, and calculating the effective image points in the same connected region with the centroid method in the process of identifying the adjacent connected regions to obtain the numerator and the denominator for calculating the coordinate value.

Description

technical field [0001] The invention belongs to the field of optical attitude sensors, in particular to a sensor image processing method. Background technique [0002] With the rapid progress of imaging detection devices and processor technology, the sun sensor for spacecraft is gradually developing from photocell type to imaging type. APS sun sensor is a new type of digital sun sensor based on APS image sensor. [0003] The APS sun sensor determines the attitude angle of the sun relative to the incident surface of the sensor by analyzing the image of the sun on the image sensor through the light introducer, thereby determining the attitude angle of the spacecraft relative to the sun, so the key point of the APS sun sensor is the image Processing completes the conversion of image information to angle information. [0004] The traditional image processing system first collects and stores the image in a large-capacity RAM, and then submits it to the processor to complete the ...

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Problems solved by technology

[0009] C.W.de Boom, N van der Heiden, 54th International Astronautical Congress of the International Astronautical Federation, the International Academy of Astronautics, and the International Institute of Space Law 29 September-3 October 2003, Bremen, Germany, “A novel digital sun sensor: development and qualification for flight.” The article introduces the realization of the APS solar sensor by TNO in the Netherlands, and mentions that FPGA performs image processing on the APS solar sensor, but the specific image processing method has not been announced

[0010] Franco BOLDRINI, Elisabetta MONNINI, "THE OFFICINE GALILEODIGITAL SUN SENSOR." The article introduces the APS sun sensor implemented by Galileo, and mentions that ASIC performs image processing on the APS sun sensor, but does not involve specific image processing methods

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