Clear path detection using a hierachical approach
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United States of America Patent
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Apr 16, 2013
Grant Date -
Apr 22, 2010
app pub date -
Oct 19, 2009
filing date -
Apr 24, 2008
priority date (Note) -
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Abstract
A method for detecting a clear path of travel for a vehicle using an image generated by a camera includes monitoring the image, and utilizing a first patch-based analysis of the image including dividing the image into a plurality of patches, and analyzing each patch to determine a first clear path confidence likelihood for each of the patches of the first patch-based analysis. Each of the patches with the first clear path confidence likelihood greater than a first threshold confidence likelihood is defined as a clear path patch. A second analysis is utilized upon a portion of the patches with the first clear path confidence not greater than the first threshold confidence likelihood to determine a second clear path confidence likelihood for each of the patches of the second analysis. Each of the patches of the second analysis with the second clear path confidence likelihood greater than a second threshold confidence likelihood is defined as a clear path patch. The clear path of travel for the vehicle is identified based upon the clear path patches.
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