Title :
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
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;
Conference_Titel :
Photonics and Optoelectronics (SOPO), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0909-8
DOI :
10.1109/SOPO.2012.6271085
