Depth variation and stereo processing tasks in natural scenes.

ABSTRACT: Local depth variation is a distinctive property of natural scenes, but its effects on perception have only recently begun to be investigated. Depth variation in natural scenes is due to depth edges between objects and surface nonuniformities within objects. Here, we demonstrate how natural depth variation impacts performance in two fundamental tasks related to stereopsis: half-occlusion detection and disparity detection. We report the results of a computational study that uses a large database of natural stereo-images and coregistered laser-based distance measurements. First, we develop a procedure for precisely sampling stereo-image patches from the stereo-images and then quantify the local depth variation in each patch by its disparity contrast. Next, we show that increased disparity con

SUBMITTER: Iyer AV 

PROVIDER: S-EPMC6005632 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature