A Depth Estimation Method for Light Field Image

A technology for depth estimation and light field images, which is applied in the field of depth estimation for light field images, can solve the problems of inaccurate background depth estimation, inability to estimate the depth of main objects and background, abrupt transition of depth change areas, etc., and achieve effective depth information , good stereoscopic perception, enhanced clarity and depth effects
CN108596965BActive Publication Date: 2021-06-04TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2021-06-04

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Abstract

The invention discloses a method for estimating the depth of a light field image, which includes: using the depth estimation guided by the structural characteristics of the light field to calculate the depth map of the color map of the central viewpoint of the light field image considering the occlusion problem; using the depth map Gradient information is used as the energy function smoothing item to optimize the global depth in the Markov random field framework; multi-scale and multi-window stereo matching is used to calculate the disparity between other viewpoints and the central viewpoint at the same horizontal position as the central viewpoint image; through The method of optical flow interpolates the parallax, and finally the depth estimation result obtained by using the characteristics of the light field image is used as the energy function data item for optimizing the global depth in the Markov random domain framework; considering the presence of occlusion, the occlusion area will affect The object boundary depth estimation combines the occlusion region predictor with the energy function smoothing term, which effectively weakens the influence of the error depth value of the occlusion region on the global depth optimization process.
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Description

technical field

[0001] The present invention relates to the technical field of image processing and stereo vision, in particular to a depth estimation method for light field images. Background technique

[0002] In recent years, light field imaging technology, as a true three-dimensional display technology, has achieved rapid development. Due to the special imaging principle of light field imaging, that is, the light field imaging device can simultaneously record the light position and angle signals in space, making it possible to adjust the depth of field, change the viewpoint, and focus after shooting first. The light field camera is composed of a main lens, a lens array and an imaging sensor, and can obtain the three-dimensional information of the shooting scene through one exposure. At the same time, the light field camera also has the ability to restore the depth information of the shooting scene, which makes the structure of the stereo vision imaging system more conci...

Claims

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