Physics – Optics
Scientific paper
Sep 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3762..101t&link_type=abstract
Proc. SPIE Vol. 3762, p. 101-109, Adaptive Optics Systems and Technology, Robert K. Tyson; Robert Q. Fugate; Eds.
Physics
Optics
Scientific paper
This paper describes an extended-image tracking technique based on the maximum likelihood estimation. The target image is assumed to have a known profile covering more than one element of a focal plane detector array. It is assumed that the relative position between the imager and the target is changing with time and the received target image has each of its pixels disturbed by an independent additive white Gaussian nose. When a rotation-invariant movement between imager and target is considered, the maximum likelihood based image tracking technique described in this paper is a closed-loop structure capable of providing iterative update of the movement estimate by calculating the loop feedback signals from a weighted correlation between the currently received target image and the previously estimated reference image in the transform domain. The movement estimate is then used to direct the imager to closely follow the moving target. This image tracking technique has many potential applications, including free-space optical communications and astronomy where accurate and stabilized optical pointing is essential.
Racho Caroline S.
Tsou Haiping
Yan Tsun-Yee
No associations
LandOfFree
Extended-image spatial tracking technique for deep-space optical downlinks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Extended-image spatial tracking technique for deep-space optical downlinks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Extended-image spatial tracking technique for deep-space optical downlinks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-989957