Sectioned Restoration of Blurred Star Image with Space-Variant Point Spread

被引：2
|
作者：
Liu, Tianlang [1 ]
Sun, Kaimin [1 ]
Liu, Chaoshan [1 ]
机构：
[1] Wuhan Univ, State Key Lab Informat Engn Surveying Mapping & R, Wuhan 430079, Hubei, Peoples R China
来源：
INFORMATION TECHNOLOGY AND INTELLIGENT TRANSPORTATION SYSTEMS, VOL 2 | 2017年 / 455卷
关键词：
Star sensor; Space-variant psf; Sectioned image restoration; High dynamic conditions; ANGULAR VELOCITY ESTIMATION; IDENTIFICATION; TRACKER;
D O I：
10.1007/978-3-319-38771-0_17
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In order to ensure the accuracy of star sensor in high dynamic conditions, the sectional processing scheme is proposed for space-variant motion blurs. The degradation of star image may be characterized by a space-variant point spread function (PSF), and the PSF of blurred star spot was formulated by its nonuniform velocity across the image plane. Then, the image is divided into several rectangular sections and each contains an interesting star spot. The center of section is the location of star predicted by the attitude measurement equation, and its size is determined by the velocity of star spot and exposure time. Further, the PSF in each section can be approximately space-invariant. The scheme is illustrated by performing attitude determination against a restored space-variant blurred star image.
引用
收藏
页码：175 / 186
页数：12
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