5 October 2017 Real-time implementation of digital stabilization for high-resolution Earth observation imaging
Author Affiliations +
In order to increase Signal to Noise Ratio of very high resolution Earth observation satellites images, Time Delay Integration (TDI) sensors are usually used. A TDI device synchronizes the electronic charge transfer with the satellite speed to virtually increase exposure time and thus signal to noise ratio. It is sensitive to high frequency attitude disturbances which may induce blurring effects when increasing time exposure. In this paper, we present an on-board satellite implementation of multiframe registration to improve classical TDI performances. A solution to no longer constrain the number of lines to be accumulated would be to compute, in real-time, the shift between each line and resample them before summation. A motion sensor dedicated to shift measurements would be added in the focal plane. Then a fast real-time algorithm will compute shift between two consecutives images delivered by the motion sensor. The optimization study of the motion sensor and the performances of a gradient-based algorithm on these images will be presented.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. Thiebaut, S. Petit-Poupart, J. M. Delvit, C. Latry, E. Bousquet, G. Laurent, "Real-time implementation of digital stabilization for high-resolution Earth observation imaging", Proc. SPIE 10430, High-Performance Computing in Geoscience and Remote Sensing VII, 1043004 (5 October 2017); doi: 10.1117/12.2278377; http://dx.doi.org/10.1117/12.2278377



Earth observing sensors

Image registration

Satellite imaging

Signal to noise ratio

Algorithm development


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