Light field imaging device and method based on digital coding control

Abstract

The invention discloses a light field imaging device based on digital coding control. The light field imaging device comprises a main lens, a digital coding element, a micro-lens array, a sensor and a logic control unit, wherein the main lens is used for converging object space light beams, the digital coding element is used for digital modulation of incident light, the micro-lens array is used for extracting light field information, the senor is used for forming light field images, and the logic control unit is used for controlling the sensor and the digital coding element. By the aid of digital modulating action of the digital coding unit on the incident light, limit of traditional light field imaging to F number matching requirement of the main lens is broken through. Angular resolution of light field imaging is improved while spatial resolution of light field images is also guaranteed, and light field imaging application flexibility and imaging quality are improved beneficially.

Description

technical field [0001] The invention relates to the technical fields of optical engineering, computer graphics, computer vision, etc., and in particular to a light field imaging device and method based on digital code control. Background technique [0002] Light field imaging is an important branch of computational imaging. Traditional imaging devices follow the imaging principle of directly acquiring two-dimensional image information with imaging lenses and photosensitive film. Computational imaging uses non-imaging optical devices to replace some traditional imaging optical devices. The new information that cannot be provided by image sensing jumps out of the constraints of the traditional image sensor's self-contained architecture, and provides richer information for image reconstruction. Computational imaging, derived from machine vision, image processing, computer graphics, and applied optics, offloads certain parts of the imaging task from an imaging setup to a comput...

AI Technical Summary

Problems solved by technology

However, this F-number matching requirement will limit the aperture size of the main lens and reduce the flexibility of the imaging device.

At the same time, under normal circumstances, the F number of the microlens is relatively large, which requires a large F number of the main lens. The larger the F number of the main lens, the smaller the aperture of the aperture, resulting in a decrease in the amount of light passing through and further affecting imaging. quality

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