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Developing an effective and efficient appearance model for robust visual tracking is difficult because of various interfering factors, such as postural change, occlusion, and rapid motion. More and more visual tracking methods tend to exploit local sparse appearance model to deal with the above problems. Since in the local sparse appearance model, all individual patch together to form a complete target...
This paper suggests a differential geometry algorithm to objectively characterize the shape of 3-D land surfaces. Differential geometry is a mathematical framework for the quantitative description of curves and surfaces. The curvature defines the shape and orientation of points on the surface. By using differential geometry to calculate surface curvatures, mathematically rigorous geometric descriptions...
Transfer function (TF) specification is an important research issue in direct volume rendering (DVR). In this paper, the problem has been developed as a parameter optimization model and a modern evolutionary algorithm, the particle swarm optimization (PSO), has been applied to solve it effectively. Initial solutions are formed and encoded into particles of PSO, the particles fly intelligently in the...
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