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We present a scene depth map generation method based on light field cameras. From the plenoptic function, the angular information about each image point under different sizes of aperture is extracted, which could be used for confocal stereo. Considering confocal constancy and gradient constancy, we take into account two constraints: (1) When a pixel is in focus, its relative intensities across aperture...
This paper proposes a scene depth map generation method based on lens-based light field cameras. In particular, it achieves the functions of the incident rays and the corresponding directional features, which can favor determining the coordinates of candidate space points. The light rays behind the aperture in the 4D light field would be converted into the rays before the aperture with their directions...
We study two communication-efficient algorithms for distributed statistical optimization on large-scale data. The first algorithm is an averaging method that distributes the N data samples evenly to m machines, performs separate minimization on each subset, and then averages the estimates. We provide a sharp analysis of this average mixture algorithm, showing that under a reasonable set of conditions,...
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