Enhancement of the accuracy of the astronomical measurements carried on the wide-field astronomical image data

2011 ◽  
Author(s):  
Martin Řeřábek ◽  
Petr Páta ◽  
Karel Fliegel
Keyword(s):  
Image Data ◽  
Wide Field ◽  
Astronomical Image

scholarly journals Advanced Processing of Images Obtained from Wide-field Astronomical Optical Systems

10.14311/1334 ◽  
2011 ◽  
Vol 51 (1) ◽  
Author(s):  
M. Řeřábek ◽  
P. Páta
Keyword(s):  
Image Data ◽  
Optical Systems ◽  
General View ◽  
Wide Field ◽  
Optical Aberrations ◽  
Transfer Characteristics ◽  
Astronomical Image ◽  
Wide Range ◽  
Spread Function ◽  
Space Variant

The principal aim of this paper is to present a general view of the special optical systems used for acquiring astronomical image data, commonly referred to as WFC or UWFC (Ultra Wide Field Camera), and of their transfer characteristics. UWFC image data analysis is very difficult in general, not only because the systems have so-called space variant (SV) properties. Images obtained from UWFC systems are usually incorrectly presented due to a wide range of optical aberrations and distortions. The influence of the optical aberrations increases towards the margins of the field of view. These aberrations distort the point spread function of the optical system and rapidly cut the accuracy of the measurements. This paper deals with simulation and modelling of the UWFC optical systems used in astronomy and their transfer characteristics.

scholarly journals Optical Navigation Sensor for Runway Relative Positioning of Aircraft during Final Approach

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2203
Author(s):  
Antal Hiba ◽  
Attila Gáti ◽  
Augustin Manecy
Keyword(s):  
Optical Sensors ◽  
Inertial Sensor ◽  
Image Data ◽  
Flight Test ◽  
Image Features ◽  
Wide Field ◽  
Test Results ◽  
Wide Field Of View ◽  
Final Approach ◽  
Marker Detection

Precise navigation is often performed by sensor fusion of different sensors. Among these sensors, optical sensors use image features to obtain the position and attitude of the camera. Runway relative navigation during final approach is a special case where robust and continuous detection of the runway is required. This paper presents a robust threshold marker detection method for monocular cameras and introduces an on-board real-time implementation with flight test results. Results with narrow and wide field-of-view optics are compared. The image processing approach is also evaluated on image data captured by a different on-board system. The pure optical approach of this paper increases sensor redundancy because it does not require input from an inertial sensor as most of the robust runway detectors.

scholarly journals Wide field astronomical image compensation with multiple laser-guided adaptive optics

2009 ◽  
Author(s):  
Michael Hart ◽  
N. Mark Milton ◽  
Christoph Baranec ◽  
Thomas Stalcup ◽  
Keith Powell ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Wide Field ◽  
Astronomical Image ◽  
Image Compensation

Astronomical Image Data Analysis in the Cloud

2015 ◽  
Author(s):  
Francisco Javier de la Mora Garcia ◽  
Teruhisa Hochin ◽  
Hiroki Nomiya
Keyword(s):  
Data Analysis ◽  
Image Data ◽  
Astronomical Image

Pattern Aware Cache Management for Efficient Subset Retrieving of Astronomical Image Data

2016 ◽  
Author(s):  
Jie Wang ◽  
Ce Yu ◽  
Zhi Hong ◽  
Jian Xiao ◽  
Chen Li ◽  
...  
Keyword(s):  
Image Data ◽  
Cache Management ◽  
Astronomical Image

Space variant point spread function modeling for astronomical image data processing

2007 ◽  
Author(s):  
Martin Řeřábek ◽  
Petr Páta ◽  
Karel Fliegel ◽  
Jan Švihlik ◽  
Pavel Koten
Keyword(s):  
Data Processing ◽  
Point Spread Function ◽  
Image Data ◽  
Astronomical Image ◽  
Point Spread ◽  
Spread Function ◽  
Space Variant
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