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503 Results Found

  • Article
  • Open Access
6 Citations
3,185 Views
17 Pages

Camera Animation for Immersive Light Field Imaging

  • Mary Guindy,
  • Attila Barsi,
  • Peter A. Kara,
  • Vamsi K. Adhikarla,
  • Tibor Balogh and
  • Aniko Simon

27 August 2022

Among novel capture and visualization technologies, light field has made significant progress in the current decade, bringing closer its emergence in everyday use cases. Unlike many other forms of 3D displays and devices, light field visualization do...

  • Review
  • Open Access
17 Citations
7,029 Views
22 Pages

Measurement Technologies of Light Field Camera: An Overview

  • Xiaoming Hu,
  • Zhuotong Li,
  • Li Miao,
  • Fengzhou Fang,
  • Zhongjie Jiang and
  • Xiaodong Zhang

31 July 2023

Visual measurement methods are extensively used in various fields, such as aerospace, biomedicine, agricultural production, and social life, owing to their advantages of high speed, high accuracy, and non-contact. However, traditional camera-based me...

  • Article
  • Open Access
17 Citations
5,462 Views
10 Pages

Vari-Focal Light Field Camera for Extended Depth of Field

  • Hyun Myung Kim,
  • Min Seok Kim,
  • Sehui Chang,
  • Jiseong Jeong,
  • Hae-Gon Jeon and
  • Young Min Song

26 November 2021

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, convent...

  • Article
  • Open Access
54 Citations
11,291 Views
29 Pages

Face Liveness Detection Using a Light Field Camera

  • Sooyeon Kim,
  • Yuseok Ban and
  • Sangyoun Lee

27 November 2014

A light field camera is a sensor that can record the directions as well as the colors of incident rays. This camera is widely utilized from 3D reconstruction to face and iris recognition. In this paper, we suggest a novel approach for defending spoof...

  • Article
  • Open Access
2 Citations
3,228 Views
11 Pages

Full-Resolution Light-Field Camera via Fourier Dual Photography

  • Yuhang Hu,
  • Manhong Yao,
  • Zhuobin Huang,
  • Junzheng Peng,
  • Zibang Zhang and
  • Jingang Zhong

10 August 2022

Conventional light-field cameras with a micro-lens array suffer from resolution trade-off and shallow depth of field. Here we develop a full-resolution light-field camera based on dual photography. We extend the principle of dual photography from rea...

  • Article
  • Open Access
3 Citations
3,385 Views
12 Pages

8 January 2024

This paper presents a hierarchical baseline stereo-matching framework for depth estimation using a novelly developed light field camera. The imaging process of a micro-lens array-based light field camera is derived. A macro-pixel map is constructed b...

  • Article
  • Open Access
9 Citations
5,227 Views
11 Pages

30 April 2022

The long-fascinated idea of creating 3D images that depict depth information along with color and brightness has been realized with the advent of a light-field camera (LFC). Recently advanced LFCs mainly utilize micro-lens arrays (MLAs) as a key comp...

  • Article
  • Open Access
4 Citations
2,894 Views
13 Pages

9 February 2023

In this paper, a novel method based on edge spread information fitting (ESIF) is proposed to accurately calibrate the geometric parameters of a focused light field camera. A focused light field camera with flexible adjustment of spatial resolution an...

  • Review
  • Open Access
2,904 Views
33 Pages

Among the novel 3D visualization technologies of our era, light field displays provide the complete 3D visual experience without the need for any personal viewing device. Due to the lack of such constraint, these displays may be viewed by any number...

  • Data Descriptor
  • Open Access
2,165 Views
16 Pages

13 December 2022

This paper describes a benchmark dataset for the detection of fuel particles in 2D and 3D image data in a rotary kiln combustion chamber. The specific challenges of detecting the small particles under demanding environmental conditions allows for the...

  • Article
  • Open Access
9 Citations
4,561 Views
20 Pages

20 November 2018

A depth estimation has been widely studied with the emergence of a Lytro camera. However, skin depth estimation using a Lytro camera is too sensitive to the influence of illumination due to its low image quality, and thus, when three-dimensional reco...

  • Article
  • Open Access
2 Citations
5,134 Views
16 Pages

29 May 2018

A system for capturing 360-degree light field information of real-existing object in one shot and then optically reconstructing is proposed. A new depth extraction algorithm for light field cameras is proposed and various camera specifications for pr...

  • Article
  • Open Access
2 Citations
2,699 Views
18 Pages

Enhancing Facial Expression Recognition through Light Field Cameras

  • Sabrine Djedjiga Oucherif,
  • Mohamad Motasem Nawaf,
  • Jean-Marc Boï,
  • Lionel Nicod,
  • Elodie Mallor,
  • Séverine Dubuisson and
  • Djamal Merad

3 September 2024

In this paper, we study facial expression recognition (FER) using three modalities obtained from a light field camera: sub-aperture (SA), depth map, and all-in-focus (AiF) images. Our objective is to construct a more comprehensive and effective FER s...

  • Article
  • Open Access
11 Citations
3,876 Views
11 Pages

Fast and Accurate 3D Measurement Based on Light-Field Camera and Deep Learning

  • Haoxin Ma,
  • Zhiwen Qian,
  • Tingting Mu and
  • Shengxian Shi

11 October 2019

The precise combination of image sensor and micro-lens array enables light-field cameras to record both angular and spatial information of incoming light, therefore, one can calculate disparity and depth from one single light-field image captured by...

  • Article
  • Open Access
33 Citations
10,334 Views
9 Pages

Miniaturized 3D Depth Sensing-Based Smartphone Light Field Camera

  • Hyun Myung Kim,
  • Min Seok Kim,
  • Gil Ju Lee,
  • Hyuk Jae Jang and
  • Young Min Song

9 April 2020

The miniaturization of 3D depth camera systems to reduce cost and power consumption is essential for their application in electrical devices that are trending toward smaller sizes (such as smartphones and unmanned aerial systems) and in other applica...

  • Technical Note
  • Open Access
26 Citations
9,139 Views
21 Pages

Imagine All the Plants: Evaluation of a Light-Field Camera for On-Site Crop Growth Monitoring

  • Robert Schima,
  • Hannes Mollenhauer,
  • Görres Grenzdörffer,
  • Ines Merbach,
  • Angela Lausch,
  • Peter Dietrich and
  • Jan Bumberger

7 October 2016

The desire to obtain a better understanding of ecosystems and process dynamics in nature accentuates the need for observing these processes in higher temporal and spatial resolutions. Linked to this, the measurement of changes in the external struc...

  • Article
  • Open Access
2 Citations
2,590 Views
29 Pages

15 April 2024

Among the common applications of plenoptic cameras are depth reconstruction and post-shot refocusing. These require a calibration relating the camera-side light field to that of the scene. Numerous methods with this goal have been developed based on...

  • Article
  • Open Access
11 Citations
6,898 Views
19 Pages

Rectification of Images Distorted by Microlens Array Errors in Plenoptic Cameras

  • Suning Li,
  • Yanlong Zhu,
  • Chuanxin Zhang,
  • Yuan Yuan and
  • Heping Tan

23 June 2018

A plenoptic cameras is a sensor that records the 4D light-field distribution of target scenes. The surface errors of a microlens array (MLA) can cause the degradation and distortion of the raw image captured by a plenoptic camera, resulting in the co...

  • Article
  • Open Access
2,441 Views
21 Pages

21 August 2024

Camera arrays can enhance the signal-to-noise ratio (SNR) between dim targets and backgrounds through multi-view synthesis. This is crucial for the detection of dim targets. To this end, we design and develop an infrared camera array system with a la...

  • Article
  • Open Access
1,009 Views
30 Pages

10 August 2025

Accurate and robust calibration of multifocal plenoptic cameras is essential for high-precision 3D light field reconstruction. In this work, we propose a blur feature-guided cascaded calibration for the plenoptic camera. First, white images at differ...

  • Article
  • Open Access
6 Citations
4,941 Views
22 Pages

11 September 2019

Microlens array (MLA) errors in plenoptic cameras can cause the confusion or mismatching of 4D spatio-angular information in the image space, significantly affecting the accuracy and efficiency of target reconstruction. In this paper, we present a hi...

  • Article
  • Open Access
24 Citations
7,238 Views
17 Pages

Enhanced 3D Point Cloud from a Light Field Image

  • Helia Farhood,
  • Stuart Perry,
  • Eva Cheng and
  • Juno Kim

2 April 2020

The importance of three-dimensional (3D) point cloud technologies in the field of agriculture environmental research has increased in recent years. Obtaining dense and accurate 3D reconstructions of plants and urban areas provide useful information f...

  • Article
  • Open Access
4 Citations
4,217 Views
15 Pages

Emulation of X-ray Light-Field Cameras

  • Nicola Viganò,
  • Felix Lucka,
  • Ombeline de La Rochefoucauld,
  • Sophia Bethany Coban,
  • Robert van Liere,
  • Marta Fajardo,
  • Philippe Zeitoun and
  • Kees Joost Batenburg

11 December 2020

X-ray plenoptic cameras acquire multi-view X-ray transmission images in a single exposure (light-field). Their development is challenging: designs have appeared only recently, and they are still affected by important limitations. Concurrently, the la...

  • Article
  • Open Access
2,595 Views
20 Pages

Light-field video provides a detailed representation of scenes captured from different perspectives. This results in a visualisation modality that enhances the immersion and engagement of the viewers with the depicted environment. In order to perform...

  • Article
  • Open Access
2 Citations
2,929 Views
22 Pages

Recovery of three-dimensional (3D) coordinates using a set of images with texture mapping to generate a 3D mesh has been of great interest in computer graphics and 3D imaging applications. This work aims to propose an approach to adaptive view select...

  • Article
  • Open Access
1 Citations
1,976 Views
14 Pages

7 August 2024

A thick-lens, structured-light measurement model is introduced to overcome the oversights in traditional models, which often disregard the impact of lens thickness. This oversight can lead to inaccuracies in Scheimpflug camera calculations, causing s...

  • Article
  • Open Access
45 Citations
12,060 Views
19 Pages

Precise Pollen Grain Detection in Bright Field Microscopy Using Deep Learning Techniques

  • Ramón Gallardo-Caballero,
  • Carlos J. García-Orellana,
  • Antonio García-Manso,
  • Horacio M. González-Velasco,
  • Rafael Tormo-Molina and
  • Miguel Macías-Macías

17 August 2019

The determination of daily concentrations of atmospheric pollen is important in the medical and biological fields. Obtaining pollen concentrations is a complex and time-consuming task for specialized personnel. The automatic location of pollen grains...

  • Review
  • Open Access
50 Citations
13,826 Views
67 Pages

28 April 2014

Understanding as well as realistic reproduction of the appearance of materials play an important role in computer graphics, computer vision and industry. They enable applications such as digital material design, virtual prototyping and faithful virtu...

  • Article
  • Open Access
6 Citations
5,537 Views
22 Pages

Multi-Camera Multi-Vehicle Tracking Guided by Highway Overlapping FoVs

  • Hongkai Zhang,
  • Ruidi Fang,
  • Suqiang Li,
  • Qiqi Miao,
  • Xinggang Fan,
  • Jie Hu and
  • Sixian Chan

9 May 2024

Multi-Camera Multi-Vehicle Tracking (MCMVT) is a critical task in Intelligent Transportation Systems (ITS). Differently to in urban environments, challenges in highway tunnel MCMVT arise from the changing target scales as vehicles traverse the narrow...

  • Technical Note
  • Open Access
38 Citations
8,907 Views
11 Pages

In Field Fruit Sizing Using A Smart Phone Application

  • Zhenglin Wang,
  • Anand Koirala,
  • Kerry Walsh,
  • Nicholas Anderson and
  • Brijesh Verma

5 October 2018

In field (on tree) fruit sizing has value in assessing crop health and for yield estimation. As the mobile phone is a sensor and communication rich device carried by almost all farm staff, an Android application (“FruitSize”) was develope...

  • Article
  • Open Access
13 Citations
3,379 Views
20 Pages

24 June 2022

The stray-light suppression of a large off-axis three-mirror anastigmatic space camera has been a hot topic, and this study proposes a composite stray-light suppression strategy that effectively suppresses stray light using the combination of a baffl...

  • Article
  • Open Access
6 Citations
3,261 Views
13 Pages

The biggest problem in imaging medicine is the occurrence of light reflection in the imaging process for lesion diagnosis. The formation of light reflection obscures the diagnostic field of the lesion and interferes with the correct diagnosis of the...

  • Article
  • Open Access
14 Citations
5,174 Views
11 Pages

12 February 2022

An aspherical airborne camera has excellent performance in the field of photoelectric reconnaissance equipment. However, the image plane contrast of the optical system will be reduced by stray light originating from inside or outside of the optical s...

  • Feature Paper
  • Article
  • Open Access
3 Citations
2,405 Views
10 Pages

Double-Glued Multi-Focal Bionic Compound Eye Camera

  • Xin Feng,
  • Xiao Lv,
  • Junyu Dong,
  • Yongshun Liu,
  • Fengfeng Shu and
  • Yihui Wu

31 July 2023

Compound eye cameras are a vital component of bionics. Compound eye lenses are currently used in light field cameras, monitoring imaging, medical endoscopes, and other fields. However, the resolution of the compound eye lens is still low at the momen...

  • Article
  • Open Access
17 Citations
6,152 Views
15 Pages

High Sensitive Night-time Light Imaging Camera Design and In-orbit Test of Luojia1-01 Satellite

  • Zhiqiang Su,
  • Xing Zhong,
  • Guo Zhang,
  • Yanjie Li,
  • Xiaojun He,
  • Qiang Wang,
  • Zongxi Wei,
  • Chunling He and
  • Deren Li

15 February 2019

Luojia1-01 satellite is the first scientific experimental satellite applied for night-time light remote sensing data acquisition, and the payload is an optical camera with high sensitivity, high radiation measurement accuracy and stable elements of i...

  • Article
  • Open Access
2 Citations
1,512 Views
13 Pages

Vignetting Compensation Method for CMOS Camera Based on LED Spatial Array

  • Shuo Huang,
  • Xifeng Zheng,
  • Xinyue Mao,
  • Yufeng Chen and
  • Yu Chen

To solve the problem of pixel light intensity information distortion caused by camera vignetting in optical devices such as CMOS or CCD cameras, existing studies mainly focus on small spatial light fields and point light sources and adopt an integrat...

  • Article
  • Open Access
1,335 Views
14 Pages

Time-Interval-Guided Event Representation for Scene Understanding

  • Boxuan Wang,
  • Wenjun Yang,
  • Kunqi Wu,
  • Rui Yang,
  • Jiayue Xie and
  • Huixiang Liu

19 May 2025

The recovery of scenes under extreme lighting conditions is pivotal for effective image analysis and feature detection. Traditional cameras face challenges with low dynamic range and limited spectral response in such scenarios. In this paper, we advo...

  • Article
  • Open Access
3 Citations
4,008 Views
19 Pages

An Innovative New Approach to Light Pollution Measurement by Drone

  • Katarzyna Bobkowska,
  • Pawel Burdziakowski,
  • Pawel Tysiac and
  • Mariusz Pulas

19 September 2024

The study of light pollution is a relatively new and specific field of measurement. The current literature is dominated by articles that describe the use of ground and satellite data as a source of information on light pollution. However, there is a...

  • Article
  • Open Access
4 Citations
3,084 Views
12 Pages

9 October 2021

This paper presents a design of a dual-band integrated space telescope system for visible light and long-wave infrared. The system can simultaneously image the visible light band of 450–900 nm and the long-wave infrared band of 7700–10,500 nm. The du...

  • Article
  • Open Access
1 Citations
2,213 Views
13 Pages

High Power Pulsed LED Driver for Vibration Measurements

  • Paolo Neri,
  • Gabriele Ciarpi and
  • Bruno Neri

24 June 2024

Vibration measurements pose specific experimental challenges to be faced. In particular, optical methods can be used to obtain full-field vibration information. In this scenario, stereo-camera systems can be developed to obtain 3D displacement measur...

  • Article
  • Open Access
47 Citations
9,900 Views
18 Pages

Phenoliner: A New Field Phenotyping Platform for Grapevine Research

  • Anna Kicherer,
  • Katja Herzog,
  • Nele Bendel,
  • Hans-Christian Klück,
  • Andreas Backhaus,
  • Markus Wieland,
  • Johann Christian Rose,
  • Lasse Klingbeil,
  • Thomas Läbe and
  • Reinhard Töpfer
  • + 4 authors

14 July 2017

In grapevine research the acquisition of phenotypic data is largely restricted to the field due to its perennial nature and size. The methodologies used to assess morphological traits and phenology are mainly limited to visual scoring. Some measureme...

  • Article
  • Open Access
517 Views
20 Pages

Outdoor Characterization and Geometry-Aware Error Modelling of an RGB-D Stereo Camera for Safety-Related Obstacle Detection

  • Pierluigi Rossi,
  • Elisa Cioccolo,
  • Maurizio Cutini,
  • Danilo Monarca,
  • Daniele Puri,
  • Davide Gattamelata and
  • Leonardo Vita

9 December 2025

Stereo cameras, also known as depth cameras or RGB-D cameras, are increasingly employed in a large variety of machinery for obstacle detection purposes and navigation planning. This also represents an opportunity in agricultural machinery for safety...

  • Article
  • Open Access
19 Citations
4,756 Views
13 Pages

Pose Estimation of Omnidirectional Camera with Improved EPnP Algorithm

  • Xuanrui Gong,
  • Yaowen Lv,
  • Xiping Xu,
  • Yuxuan Wang and
  • Mengdi Li

10 June 2021

The omnidirectional camera, having the advantage of broadening the field of view, realizes 360° imaging in the horizontal direction. Due to light reflection from the mirror surface, the collinearity relation is altered and the imaged scene has severe...

  • Article
  • Open Access
13 Citations
6,092 Views
17 Pages

A Smart Camera Trap for Detection of Endotherms and Ectotherms

  • Dean M. Corva,
  • Nathan I. Semianiw,
  • Anne C. Eichholtzer,
  • Scott D. Adams,
  • M. A. Parvez Mahmud,
  • Kendrika Gaur,
  • Angela J. L. Pestell,
  • Don A. Driscoll and
  • Abbas Z. Kouzani

28 May 2022

Current camera traps use passive infrared triggers; therefore, they only capture images when animals have a substantially different surface body temperature than the background. Endothermic animals, such as mammals and birds, provide adequate tempera...

  • Article
  • Open Access
4 Citations
2,954 Views
15 Pages

Calibration of a Catadioptric System and 3D Reconstruction Based on Surface Structured Light

  • Zhenghai Lu,
  • Yaowen Lv,
  • Zhiqing Ai,
  • Ke Suo,
  • Xuanrui Gong and
  • Yuxuan Wang

28 September 2022

In response to the problem of the small field of vision in 3D reconstruction, a 3D reconstruction system based on a catadioptric camera and projector was built by introducing a traditional camera to calibrate the catadioptric camera and projector sys...

  • Article
  • Open Access
1,642 Views
18 Pages

5 June 2024

Light field (LF) cameras can capture a scene’s information from all different directions and provide comprehensive image information. However, the resulting data processing commonly encounters problems of low contrast and low image quality. In...

  • Article
  • Open Access
3 Citations
3,731 Views
10 Pages

Measuring Facial Illuminance with Smartphones and Mobile Devices

  • Rosa María Salmerón-Campillo,
  • Arthur Bradley,
  • Mateusz Jaskulski and
  • Norberto López-Gil

18 August 2021

Introduction: To uncover a relationship between light exposure and myopia is complicated because of the challenging nature of measuring visually relevant illumination experienced by children. Objective: To find a methodology to measure face illuminan...

  • Communication
  • Open Access
2 Citations
3,119 Views
12 Pages

A Single-Pixel Imaging Scheme with Obstacle Detection

  • Peiming Li,
  • Haixiao Zhao,
  • Wenjie Jiang,
  • Zexin Zhang and
  • Baoqing Sun

Single-pixel imaging (SPI) utilizes a second-order correlation of structured illumination light field and a single-pixel detector to form images. As the single-pixel detector provides no spatial resolution, a structured illumination light field gener...

  • Brief Report
  • Open Access
13 Citations
4,517 Views
11 Pages

The Instrument Design of Lightweight and Large Field of View High-Resolution Hyperspectral Camera

  • Xinghao Fan,
  • Chunyu Liu,
  • Shuai Liu,
  • Yunqiang Xie,
  • Liangliang Zheng,
  • Tiancong Wang and
  • Qinping Feng

24 March 2021

The design of compact hyperspectral cameras with high ground resolution and large field of view (FOV) is a challenging problem in the field of remote sensing. In this paper, the time-delayed integration (TDI) of the digital domain is applied to solve...

  • Letter
  • Open Access
15 Citations
7,441 Views
11 Pages

14 December 2020

Current smartphones equipped with high-sensitivity and high-resolution sensors in the camera can respond to the needs of low-light imaging, streaming acquisition, targets of various scales, etc. Therefore, a smartphone has great potential as an imagi...

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