The Blurred Stars Image Preprocessing Technique of Star Sensor

Author

Shen Xiao Fang ; Liu Chao Shan

Author_Institution

Xi´an Inst. of High-Tech, Xi´an, China

fYear

2012

fDate

21-23 May 2012

Firstpage

1

Lastpage

2

Abstract

When the star sensor with high dynamic rotation, blurred image preprocessing technique of the star sensor is need to discuss in detailed. Firstly, the motion-blurred image model in star sensor is given. Then, applying sub-windows technique to improve the dynamics of the star sensor and dynamic compensation for the area starlight reached, which adopt the inverse process of the generation mechanism of motion-blurred star image to compensate in spatial domain. Secondly, the binaization threshold is confirmed under the constant false alarm condition. Finally the centroid method and improved centroid method are applied to calculate the center of the star, and precision of these methods still exceed 1/10 pixel.

Keywords

astronomical image processing; astronomical techniques; inverse problems; binaization threshold; blurred stars image preprocessing technique; centroid method; constant false alarm condition; dynamic compensation; dynamic rotation; generation mechanism; inverse process; motion-blurred image model; star sensor; subwindows technique; Accuracy; Dynamics; Heuristic algorithms; Image restoration; Signal to noise ratio; Tracking;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics and Optoelectronics (SOPO), 2012 Symposium on

Conference_Location

Shanghai

ISSN

2156-8464

Print_ISBN

978-1-4577-0909-8

Type

conf

DOI

10.1109/SOPO.2012.6271085

Filename

6271085