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This paper surveys the state-of-the-art automatic object extraction techniques from aerial imagery. It focuses on building extraction approaches, which present the majority of the work in this area. After proposing well-defined criteria for their assessment, characteristic approaches are selected...
It is shown that the problem of independent motion detection can be addressed by analyzing constraints on low-dimensional directional (projected) components of flow fields. We construct a robust algorithm, implemented as a recursive filter, to extract directional motion parameters from long image...