| http://www.w3.org/ns/prov#value | - or storing vertical transitions having one of a pair of opposite transition senses;(i) if said selected spline segment is located in one of said quadrants other than said first quadrant, then reflecting said selected spline segment into said first quadrant of said pixel grid; (ii) generating a non-parametric equation describing said selected spline segment; (iii) solving said non-parametric equati
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