IEEE Trans Pattern Anal Mach Intell - Variational Light Field Analysis for Disparity Estimation and Super-Resolution.

Tópicos

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Resumo

We develop a continuous framework for the analysis of 4D light fields, and describe novel variational methods for disparity reconstruction as well as spatial and angular super-resolution. Disparity maps are estimated locally using epipolar plane image analysis without the need for expensive matching cost minimization. The method works fast and with inherent subpixel accuracy, since no discretization of the disparity space is necessary. In a variational framework, we employ the disparity maps to generate super-resolved novel views of a scene, which corresponds to increasing the sampling rate of the 4D light field in spatial as well as angular direction. In contrast to previous work, we formulate the problem of view synthesis as a continuous inverse problem, which allows us to correctly take into account foreshortening effects caused by scene geometry transformations. All optimization problems are solved with state-of-the-art convex relaxation techniques. We test our algorithms on a number of real-world examples as well as our new benchmark dataset for lightfields, and compare results to a multiview stereo method. The proposed method is both faster as well as more accurate. Data sets and source code are provided online for additional evaluation.

Resumo Limpo

develop continu framework analysi d light field describ novel variat method dispar reconstruct well spatial angular superresolut dispar map estim local use epipolar plane imag analysi without need expens match cost minim method work fast inher subpixel accuraci sinc discret dispar space necessari variat framework employ dispar map generat superresolv novel view scene correspond increas sampl rate d light field spatial well angular direct contrast previous work formul problem view synthesi continu invers problem allow us correct take account foreshorten effect caus scene geometri transform optim problem solv stateoftheart convex relax techniqu test algorithm number realworld exampl well new benchmark dataset lightfield compar result multiview stereo method propos method faster well accur data set sourc code provid onlin addit evalu

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