Skip to Content
Find More Like This
Return to Search

Estimating vehicle height using homographic projections

United States Patent

July 16, 2013
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
Multiple homography transformations corresponding to different heights are generated in the field of view. A group of salient points within a common estimated height range is identified in a time series of video images of a moving object. Inter-salient point distances are measured for the group of salient points under the multiple homography transformations corresponding to the different heights. Variations in the inter-salient point distances under the multiple homography transformations are compared. The height of the group of salient points is estimated to be the height corresponding to the homography transformation that minimizes the variations.
Cunningham; Mark F. (Oak Ridge, TN), Fabris; Lorenzo (Knoxville, TN), Gee; Timothy F. (Oak Ridge, TN), Ghebretati, Jr.; Frezghi H. (Sunnyvale, CA), Goddard; James S. (Knoxville, TN), Karnowski; Thomas P. (Knoxville, TN), Ziock; Klaus-peter (Clinton, TN)
UT-Battelle, LLC (Oak Ridge, TN)
12/ 511,362
July 29, 2009
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was made with United States government support under Prime Contract No. DE-AC05-00OR22725 awarded by the U.S. Department of Energy. The United States government has certain rights in this invention.