We propose a method to estimate dense motion vector fields from multi-exposure images. Our approach relies on finding a sparse set of correspondences between features in a single-exposure image and each exposure in a multi-exposure image using a global optimization technique. We iteratively establish such matches, compute a set of locally restricted transformations for the matches, and construc...

A family of subsets of an n–set is k–locally thin if for every k of its member sets the ground set has at least one element contained in exactly 1 of them. We derive new asymptotic upper bounds for the maximum cardinality of locally thin set families for every even k. This improves on previous results of two of us with Monti. ∗Research supported in part by a USA Israeli BSF grant and by a grant...

Dense pairs of geometric topological fields have tame open core, that is, every definable subset in the pair is already reduct. We fix a minor gap published version van den Dries's seminal work on dense o-minimal groups, and show unary function agrees with reduct, off small subset, set internal to predicate. For certain without independence property, whenever underlying group contained dense-co...