IEEE Trans Image Process - Learning-based, automatic 2D-to-3D image and video conversion.

Tópicos

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Resumo

Despite a significant growth in the last few years, the availability of 3D content is still dwarfed by that of its 2D counterpart. To close this gap, many 2D-to-3D image and video conversion methods have been proposed. Methods involving human operators have been most successful but also time-consuming and costly. Automatic methods, which typically make use of a deterministic 3D scene model, have not yet achieved the same level of quality for they rely on assumptions that are often violated in practice. In this paper, we propose a new class of methods that are based on the radically different approach of learning the 2D-to-3D conversion from examples. We develop two types of methods. The first is based on learning a point mapping from local image/video attributes, such as color, spatial position, and, in the case of video, motion at each pixel, to scene-depth at that pixel using a regression type idea. The second method is based on globally estimating the entire depth map of a query image directly from a repository of 3D images ( image+depth pairs or stereopairs) using a nearest-neighbor regression type idea. We demonstrate both the efficacy and the computational efficiency of our methods on numerous 2D images and discuss their drawbacks and benefits. Although far from perfect, our results demonstrate that repositories of 3D content can be used for effective 2D-to-3D image conversion. An extension to video is immediate by enforcing temporal continuity of computed depth maps.

Resumo Limpo

despit signific growth last year avail d content still dwarf d counterpart close gap mani dtod imag video convers method propos method involv human oper success also timeconsum cost automat method typic make use determinist d scene model yet achiev level qualiti reli assumpt often violat practic paper propos new class method base radic differ approach learn dtod convers exampl develop two type method first base learn point map local imagevideo attribut color spatial posit case video motion pixel scenedepth pixel use regress type idea second method base global estim entir depth map queri imag direct repositori d imag imagedepth pair stereopair use nearestneighbor regress type idea demonstr efficaci comput effici method numer d imag discuss drawback benefit although far perfect result demonstr repositori d content can use effect dtod imag convers extens video immedi enforc tempor continu comput depth map

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