Method for directly obtaining depth image through light field camera one-time imaging

Abstract

A method for directly obtaining a depth image through light field camera one-time imaging comprises the steps that (1) a micro-lens array is embedded into an internal imaging light path of a traditional camera to form a light field camera; (2) the relative position of the micro-lens array and an image sensor is calibrated; (3) the light field camera is used for collecting original data of a target scene, a sub-image under each micro-lens in the micro-lens array is extracted and a grey-scale image of each sub-image is calculated; (4) the similarity between the sub-image under each micro-lens and the sub-image under the adjacent micro-lens is calculated, each micro-lens used as a target lens and multiple adjacent lenses around the corresponding micro-lens are selected in order to establish target templates and adjacent templates respectively, an SAD algorithm is used for calculating the similarity between the target templates and the adjacent templates and minimum SAD values are obtained; (5) the minimum SAD values obtained in the step (4) and corresponding to the sub-images under all the micro-lenses form a value matrix with the size being the number of the micro-lenses in the micro-lens array, and the depth image is obtained after normalized rounding is conducted on elements in the array. The method for directly obtaining the depth image through light field camera one-time imaging solves the problems that in an existing depth image obtaining technology, a system is too complex and the computation complexity is high, the obtained image similarity is high and the obtained depth image is more accurate.

Description

technical field [0001] The invention relates to the field of computer vision, in particular to the field of stereo vision, and in particular to a method for directly acquiring a depth map with a light field camera in one imaging. technical background [0002] With the development of information science and computer technology, 3D information acquisition technology has become a key technology in the fields of industrial inspection, biomedicine, and virtual reality. In the above fields, people have higher and higher requirements for the quality of 3D information. [0003] Depth information is the embodiment of the "third dimension". How to obtain a higher-precision depth map more quickly has always been a hot topic in research and development. At present, there are two main ways to obtain depth information: active and passive. The active type mainly sends laser, electromagnetic wave, ultrasonic wave and other energy beams capable of detecting echo to the target, and uses phy...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of too complex system and high computational complexity existing in the existing depth map acquisition technology, the present invention provides a method for obtaining a depth map by one-time imaging with a light field camera, which uses a light field camera with a microlens array to collect light Field information, a depth map can be obtained in one imaging

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