Coherent correlation addition for increasing match information in scene matching navigation systems
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United States of America Patent
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Sep 8, 1992
Grant Date -
N/A
app pub date -
Jan 24, 1990
filing date -
Jan 24, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus are described for image matching, particularly for increasing match information in scene matching navigation systems. The invention correlates a sequence of sensed images with a reference map and stores the resultant correlation surfaces. The correlation surfaces are then added so that match point correlations combine coherently by superposing the individual correlation surfaces using short term accurate navigation data. As a result, a composite correlation surface is formed in which the values at the peak (or antipeak) position add up and the effective match area is greatly increased. Both peaks and antipeaks are then detected to determine a match point and provide a navigation position update.
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Cited Art Landscape
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