Vari-Focal Light Field Camera for Extended Depth of Field

被引：11

作者：

Kim, Hyun Myung ^{[1
]}

Kim, Min Seok ^{[1
]}

Chang, Sehui ^{[1
]}

Jeong, Jiseong ^{[2
,3
]}

Jeon, Hae-Gon ^{[3
]}

Song, Young Min ^{[1
,3
]}

机构：

[1] Gwangju Inst Sci & Technol, Sch Elect Engn & Comp Sci, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[2] SOSLAB, BI Ctr, B-101,GIST 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

[3] Gwangju Inst Sci & Technol, AI Grad Sch, 123 Cheomdangwagi Ro, Gwangju 61005, South Korea

来源：

MICROMACHINES | 2021年 / 12卷 / 12期

关键词：

light field camera; micro-lens array; vari-focal lens; depth estimation; MICROLENS ARRAY;

D O I：

10.3390/mi12121453

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The light field camera provides a robust way to capture both spatial and angular information within a single shot. One of its important applications is in 3D depth sensing, which can extract depth information from the acquired scene. However, conventional light field cameras suffer from shallow depth of field (DoF). Here, a vari-focal light field camera (VF-LFC) with an extended DoF is newly proposed for mid-range 3D depth sensing applications. As a main lens of the system, a vari-focal lens with four different focal lengths is adopted to extend the DoF up to ~15 m. The focal length of the micro-lens array (MLA) is optimized by considering the DoF both in the image plane and in the object plane for each focal length. By dividing measurement regions with each focal length, depth estimation with high reliability is available within the entire DoF. The proposed VF-LFC is evaluated by the disparity data extracted from images with different distances. Moreover, the depth measurement in an outdoor environment demonstrates that our VF-LFC could be applied in various fields such as delivery robots, autonomous vehicles, and remote sensing drones.

引用

页数：10

共 29 条

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