Improving spatial resolution of the light field microscope with Fourier ptychography

2017 ◽  
Author(s):  
Tomohiro Suzuki ◽  
Yoshitake Tani ◽  
Kenjiro Takai Miura
Keyword(s):  
Spatial Resolution ◽  
Light Field

Spatial resolution of light field sectioning pyrometry for flame temperature measurement

2021 ◽  
Vol 140 ◽  
pp. 106545
Author(s):  
Yudong Liu ◽  
Mingjuan Zhu ◽  
Tianxiang Wang ◽  
Gang Lei ◽  
Md. Moinul Hossain ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Spatial Resolution ◽  
Light Field ◽  
Flame Temperature

scholarly journals Fast and Accurate Light Field View Synthesis by Optimizing Input View Selection

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 557
Author(s):  
Xingzheng Wang ◽  
Yongqiang Zan ◽  
Senlin You ◽  
Yuanlong Deng ◽  
Lihua Li
Keyword(s):  
Spatial Resolution ◽  
Light Field ◽  
Angular Resolution ◽  
Super Resolution ◽  
Depth Estimation ◽  
View Synthesis ◽  
The Novel ◽  
Arbitrary Location ◽  
Field View

There is a trade-off between spatial resolution and angular resolution limits in light field applications; various targeted algorithms have been proposed to enhance angular resolution while ensuring high spatial resolution simultaneously, which is also called view synthesis. Among them, depth estimation-based methods can use only four corner views to reconstruct a novel view at an arbitrary location. However, depth estimation is a time-consuming process, and the quality of the reconstructed novel view is not only related to the number of the input views, but also the location of the input views. In this paper, we explore the relationship between different input view selections with the angular super-resolution reconstruction results. Different numbers and positions of input views are selected to compare the speed of super-resolution reconstruction and the quality of novel views. Experimental results show that the speed of the algorithm decreases with the increase of the input views for each novel view, and the quality of the novel view decreases with the increase of the distance from the input views. After comparison using two input views in the same line to reconstruct the novel views between them, fast and accurate light field view synthesis is achieved.

scholarly journals Improving Spatial Resolution in Real-time for Ultra-thin Light Field Cameras

2021 ◽  
Vol 27 (3) ◽  
pp. 25-29
Author(s):  
Donggun Kim ◽  
Jaekwan Ryu ◽  
Yongjin Jo ◽  
Min H. Kim
Keyword(s):  
Real Time ◽  
Spatial Resolution ◽  
Light Field

scholarly journals An industrial light field camera applied for 3D velocity measurements in flow past confined cylinder

2019 ◽  
Vol 196 ◽  
pp. 00056
Author(s):  
Alexander Seredkin ◽  
Maxim Shestakov ◽  
Tokarev Mikhail
Keyword(s):  
Quality Control ◽  
Spatial Resolution ◽  
Light Field ◽  
Optical Axis ◽  
Turbulent Wake ◽  
Velocity Fields ◽  
Depth Of Field ◽  
Velocity Measurements ◽  
Piv Measurements ◽  
Light Field Image

Light field cameras have some advantages over classic cameras in a narrow field of application, such photography, cinematography surveillance and quality control in industry. Light field cameras have larger depth of field, compare to regular camera, but lower spatial resolution along optical axis then binocular system. However, 3D velocity measurements using light field are reasonable alternative to modern 3D PIV measurements. The nature of light field image requires extra reconstruction step which affects overall accuracy. In this article, light field PTV was compared to Tomo-PIV. Both techniques were used to measure 3D velocity fields in a turbulent wake past confined cylinder.

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