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2004
ACM

Road extraction from motion cues in aerial video

11 years 5 months ago
Road extraction from motion cues in aerial video
Aerial video provides strong cues for automatic road extraction that are not available in static aerial images. Using stabilized (or geo-referenced) video data, capturing the distribution of spatio-temporal image derivatives gives a powerful, local representation of the scene variation and motion typical at each pixel. This allows a functional attribution of the scene; a "road" is defined as paths of consistent motion -- a definition which is valid in a large and diverse set of environments. Using a classical relationship between image motion and spatio-temporal image derivatives, road features can be extracted as image regions that have significant image variation and a motion consistent with its neighbors. The video pre-processing to generate image derivative distributions over arbitrarily long sequences is implemented in real time on standard laptops, and the flow field computation and interpretation involves a small number of 3 by 3 matrix operations at each pixel locati...
Robert Pless, David Jurgens
Added 11 Nov 2009
Updated 11 Nov 2009
Type Conference
Year 2004
Where GIS
Authors Robert Pless, David Jurgens
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