Light field three-dimensional reconstruction method based on fast Fourier transform

Abstract

The invention discloses an optical field three-dimensional reconstruction method based on fast Fourier transform. The method comprises the following steps: converting an acquired optical field image stack into 4D phase space information; rearranging pixels at corresponding positions in the light field diagram, and converting the pixels into multi-angle phase space information; initializing three-dimensional body information according to the phase space information, and converting the three-dimensional body information into three-dimensional frequency domain information; arranging the five-dimensional phase space point spread functions according to two-dimensional angles to obtain space information of three-dimensional point spread functions corresponding to the angles, and converting the point spread functions into a frequency domain; forwarding the three-dimensional body to obtain two-dimensional frequency domain information of a forwarded image; back-transmitting the forward projection of the frequency domain to obtain back-transmitted three-dimensional frequency domain information; converting into spatial domain information through inverse Fourier transform; converting the collected phase space information into a frequency domain, and converting the phase space information into spatial domain information through back propagation and inverse Fourier transform; and updating the spatial information of the three-dimensional body until iteration is finished. The invention can quickly process the light field data to obtain an accurate three-dimensional reconstruction result.

Description

technical field [0001] The invention relates to the technical field of three-dimensional reconstruction, in particular to a method for three-dimensional reconstruction of a light field based on fast Fourier transform. Background technique [0002] Light field (Light Field, LF) imaging is a fast volume imaging method. The light field system adds a microlens array to the original imaging surface, and uses sensors to record 4D light field information. Since it can record 3D information of a scene with a single exposure, it has been widely used in the field of 3D imaging in recent years. [0003] For the 4D light field information collected by the light field system, the existing 3D reconstruction methods include the Richard-Lucy reconstruction algorithm, phase space-based reconstruction methods, etc. The size and the depth of reconstruction are positively correlated, and the speed is very slow and consumes a lot of computing resources. In addition, using the Richard-Lucy rec...

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Problems solved by technology

[0003] For the 4D light field information collected by the light field system, the existing 3D reconstruction methods include the Richard-Lucy reconstruction algorithm, phase space-based reconstruction methods, etc. The size and the depth of the reconstruction are positively correlated, the speed is very slow and it will take up a lot of computing resources

In addition, using the Richard-Lucy reconstruction algorithm will also bring artifacts to the focal plane

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