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Traditional upsampling methods apply spatial-invariant filtering across the entire image for efficiency, but often produce unsatisfactory artifacts around the edges. We propose a novel image upsampling algorithm that preserves the image structure, particularly around the edges, better than previous techniques. Our method computes a spline approximation to the edges in the image via bitmap tracing...
Scientists study trajectory data to understand trends in movement patterns, such as human mobility for traffic analysis and urban planning. In this paper, we introduce a novel trajectory clustering technique whose central idea is to use vector fields to induce a notion of similarity between trajectories, letting the vector fields themselves define and represent each cluster. We present an efficient...
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