FPGA based star-sensor multimode image preprocessing method

An image preprocessing and star sensor technology, which is applied in the field of star sensor image processing, can solve problems such as unseen reports, and achieve the effects of improving real-time performance, work efficiency, strong practicability, and high reliability

Active Publication Date: 2014-12-10
BEIJING INST OF CONTROL ENG
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, the research on multiple modes at home and abroad is still in its infancy, and no related detai

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • FPGA based star-sensor multimode image preprocessing method
  • FPGA based star-sensor multimode image preprocessing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0071] The working principle and working process of the present invention will be further explained and illustrated below in conjunction with the accompanying drawings.

[0072] The present invention, a kind of star sensor multi-mode image preprocessing method based on FPGA, the present invention is based on such as figure 2 The multi-mode image processing circuit shown includes a window data interception module, an adaptive weighted filtering module, a full image mode storage module, a filtering mode storage module, a window mode storage module, a window row address register, a window column address register, and a mode selection register , a data buffer register, a background estimation correction value register, and a filter coefficient register.

[0073] The background valuation correction amount register is used to store the background valuation correction amount. The register has 16 bits in total, and the high bit of D8 indicates the positive or negative of the data (1:...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention provides an FPGA based general multimode image preprocessing method comprising steps as follows: a processor sets image storing modes for a preprocessing circuit, which are three modes in total: an original image mode, a self-adaption grey weighted filtering mode and a window mode; in the original mode, sequentially storing data into an off-chip memory according to row and field signals; in the filtering mode, after conducting self-adaption gradient weighted filtering on image data, only storing the original grey value, filter grey value and row position information and column position information of active pixels which are larger than 0; in the windowing mode, conducting a window capturing process, in which the first byte of each frame of image data is a window number, the second byte is a row number, and the subsequent bytes are pixel data; computing the storage position of the first pixel in the row according to the window number and the row number, and then storing subsequent pixel data using the position as the head address. The present invention improves storage efficiency of an image preprocessing circuit and improves the processing and operation performance of system.

Description

technical field [0001] The invention relates to an FPGA-based multi-mode image preprocessing method of a star sensor, which is suitable for star point navigation preprocessing of a very high-precision star sensor and belongs to the technical field of star sensor image processing. Background technique [0002] Very high-precision star-sensitive cameras are widely used in starship rendezvous and docking and rendezvous measurement subsystems. The single-frame capture accuracy can reach 400W pixels. If the star point extraction operation is performed on the entire frame image in each control cycle, it will increase the load on the processor. Burden and consume a lot of control cycle time and system resources, so the entire frame information should be processed at the initial time point, after the star point position is captured, the star point extraction in the subsequent image sequence is completed in the window mode near the star point position, so as to Reduce the number of p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04N5/232
Inventor 叶有时孙强施蕾聂晓慧彭宇梁潇王龙武延鹏熊军刘波吴一帆杨桦
Owner BEIJING INST OF CONTROL ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap