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Proceedings Paper

Acquisition probability estimation model based on discrete fractional Brownian random field
Author(s): Guozhong Zhang; Lincheng Shen; Wensen Chang
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Paper Abstract

Scene navigability is a character of local scene area, and the character embodies the ability of position-correction of some scene area for navigation system. Such ability provides position-correction for Inertia Navigation System of aircraft, which adopts Digit Scene Matching Area Correlator(DSMAC) techniques. When analyzing the navigability of scene matching system for some scene area, the information content of scene is the most important factor. Generally speaking, the scene navigability can be determined by acquisition probability or matching fix precision of the navigation system. The paper broadens the hypothesis of the reference map and additional noise. The preprocessed reference map is supposed as discrete fractional Brownian random field with zero mean, and additional noise is supposed as independent random field with zero mean. The optimal expression of the measurement of DSMAC is deduced. Analyzing fractal and statistics characteristic of reference image derives an estimation model of acquisition probability on Cross Correlation Scene Matching Systems. Many experiments with satellite images demonstrate the validity of this proposed acquisition probability model. The relation between acquisition probability and fractal feature is set up, and it provides a theoretical and practical basis for design of self-guided systems using scene matching.

Paper Details

Date Published: 6 August 2003
PDF: 8 pages
Proc. SPIE 5084, Location Services and Navigation Technologies, (6 August 2003); doi: 10.1117/12.488089
Show Author Affiliations
Guozhong Zhang, National Univ. of Defense Technology (China)
Lincheng Shen, National Univ. of Defense Technology (China)
Wensen Chang, National Univ. of Defense Technology (China)

Published in SPIE Proceedings Vol. 5084:
Location Services and Navigation Technologies
Yilin Zhao, Editor(s)

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