IEEE Trans Pattern Anal Mach Intell - Dynamic Refraction Stereo.

Tópicos

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Resumo

In this paper we consider the problem of reconstructing the 3D position and surface normal of points on an unknown, arbitrarily-shaped refractive surface. We show that two viewpoints are sufficient to solve this problem in the general case, even if the refractive index is unknown. The key requirements are 1) knowledge of a function that maps each point on the two image planes to a known 3D point that refracts to it, and 2) light is refracted only once. We apply this result to the problem of reconstructing the time-varying surface of a liquid from patterns placed below it. To do this, we introduce a novel "stereo matching" criterion called refractive disparity, appropriate for refractive scenes, and develop an optimization-based algorithm for individually reconstructing the position and normal of each point projecting to a pixel in the input views. Results on reconstructing a variety of complex, deforming liquid surfaces suggest that our technique can yield detailed reconstructions that capture the dynamic behavior of free-flowing liquids.

Resumo Limpo

paper consid problem reconstruct d posit surfac normal point unknown arbitrarilyshap refract surfac show two viewpoint suffici solv problem general case even refract index unknown key requir knowledg function map point two imag plane known d point refract light refract appli result problem reconstruct timevari surfac liquid pattern place introduc novel stereo match criterion call refract dispar appropri refract scene develop optimizationbas algorithm individu reconstruct posit normal point project pixel input view result reconstruct varieti complex deform liquid surfac suggest techniqu can yield detail reconstruct captur dynam behavior freeflow liquid

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