Calculation of Light Field Created by Point Unidirectional Source in 3‐Dimensional Scattering Media

2009 ◽  
Author(s):  
Vladimir P. Budak ◽  
Kirill V. Klimenko ◽  
Dmitry A. Klyuykov
Keyword(s):  
Light Field ◽  
Scattering Media ◽  
3 Dimensional ◽  
Unidirectional Source ◽  
Point Unidirectional Source

Differential albedo for gamma rays from a point unidirectional source

1967 ◽  
Vol 23 (3) ◽  
pp. 907-911 ◽  
Author(s):  
A. A. Viktorov ◽  
B. A. Efimenko ◽  
V. G. Zolotukhin ◽  
V. A. Klimanov ◽  
V. P. Mashkovich
Keyword(s):  
Gamma Rays ◽  
Unidirectional Source ◽  
Point Unidirectional Source

scholarly journals Light Fields for Face Analysis

Sensors ◽  
2019 ◽  
Vol 19 (12) ◽  
pp. 2687 ◽  
Author(s):  
Chiara Galdi ◽  
Valeria Chiesa ◽  
Christoph Busch ◽  
Paulo Lobato Correia ◽  
Jean-Luc Dugelay ◽  
...  
Keyword(s):  
Light Field ◽  
Dimensional Space ◽  
Field Vector ◽  
Attack Detection ◽  
Light Fields ◽  
Face Analysis ◽  
Facial Landmark Detection ◽  
Plenoptic Function ◽  
3 Dimensional ◽  
Future Challenges

The term “plenoptic” comes from the Latin words plenus (“full”) + optic. The plenoptic function is the 7-dimensional function representing the intensity of the light observed from every position and direction in 3-dimensional space. Thanks to the plenoptic function it is thus possible to define the direction of every ray in the light-field vector function. Imaging systems are rapidly evolving with the emergence of light-field-capturing devices. Consequently, existing image-processing techniques need to be revisited to match the richer information provided. This article explores the use of light fields for face analysis. This field of research is very recent but already includes several works reporting promising results. Such works deal with the main steps of face analysis and include but are not limited to: face recognition; face presentation attack detection; facial soft-biometrics classification; and facial landmark detection. This article aims to review the state of the art on light fields for face analysis, identifying future challenges and possible applications.

scholarly journals Exploiting light field imaging through scattering media for optical encryption

OSA Continuum ◽  
2020 ◽  
Vol 3 (11) ◽  
pp. 2968
Author(s):  
Yifan Liu ◽  
Panpan Yu ◽  
Yinmei Li ◽  
Lei Gong
Keyword(s):  
Light Field ◽  
Scattering Media ◽  
Optical Encryption ◽  
Light Field Imaging ◽  
Field Imaging
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