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A high-speed star point detection method and system based on an FPGA

A detection system and detection method technology, applied in image data processing, instruments, calculations, etc., can solve the problems of long time delay in star point detection methods, and achieve simple results

Inactive Publication Date: 2019-04-26
BEIJING INST OF REMOTE SENSING EQUIP
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Problems solved by technology

[0003] The invention discloses a high-speed star point detection method and system based on FPGA, which solves the problem that the time delay of the existing star point detection method is too long

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  • A high-speed star point detection method and system based on an FPGA
  • A high-speed star point detection method and system based on an FPGA
  • A high-speed star point detection method and system based on an FPGA

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Embodiment Construction

[0021] Please refer to figure 1 , a high-speed star point detection system based on FPGA of the present invention, comprising: a top-level control module, a data cache module, a threshold value calculation module, a mean variance calculation module and a star point judgment module, the top-level control module, a data cache module, a threshold value Calculation module, mean variance calculation module and star point judgment module all operate in FPGA, wherein data cache module, threshold value calculation module, mean value variance calculation module and star point judgment module are connected in sequence, and described top-level control module is used for Z The channel data is connected, and the image signal of each channel is stored in the RAM by pixel row; the data cache module is used for M row data pre-caching of each channel; the threshold calculation module is used for buffering the data For the M rows of data released by the module, an M×N window is opened with the ...

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Abstract

The invention discloses an FPGA-based high-speed star point detection method and system. The system comprises a top control module, a data caching module, a threshold calculation module, a mean variance calculation module and a star point judgment module. Top control module, Data caching module, Threshold calculation module, the mean value variance calculation module and the star point judgment module both operate in the FPGA, the data caching module, the threshold value calculation module, the mean value variance calculation module and the star point judgment module are sequentially connected, and the data caching module, the threshold value calculation module, the mean value variance calculation module and the star point judgment module are submodules of the top layer control module. According to the method, Z-channel data connection is realized by using the top layer control module; wherein the data caching module is used for realizing M rows of data pre-caching of each channel, thethreshold calculation module is used for realizing data calculation at different positions, the mean value variance calculation module is used for calculating a mean value and a variance value of a windowing center point, and the star point judgment module is used for judging the effectiveness of a star point and recording coordinates. By combining the imaging effect, high-speed star point detection can be realized by utilizing the FPGA, and the detection time is 1 / Z of the transmission time of one row of images.

Description

technical field [0001] The invention relates to a star point detection method and system, in particular to an FPGA-based high-speed star point detection method and system. Background technique [0002] Attitude measurement and positioning of space products generally requires a star sensor. The star sensor performs star map matching based on the collected multiple star positions, obtains the product attitude and performs attitude correction. In the past, the star sensor detected a frame of image The end time of the star point information is delayed by one line of transmission time than the image transmission completion time. When the image is too large, due to limited DSP resources, it is impossible to directly transmit the image to DSP for star point detection. Contents of the invention [0003] The invention discloses an FPGA-based high-speed star point detection method and system, which solves the problem of too long time delay in the existing star point detection metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T7/136
CPCG06T7/0002G06T7/136
Inventor 郭宝辉杨飞陈必新
Owner BEIJING INST OF REMOTE SENSING EQUIP