scholarly journals High-Definition Pulsed Neutron Imaging with High-Frame-Rate Camera Using Center-of-Gravity and Super-Resolution Processing for Bright Spots from Image Intensifier

2019 ◽  
Author(s):  
Katsuya Kanehira ◽  
Toshiyuki Uragaki ◽  
Junpei Koide ◽  
Yusuke Kushima ◽  
Naoto Hagura ◽  
...  
Keyword(s):  
Super Resolution ◽  
Image Intensifier ◽  
Center Of Gravity ◽  
Neutron Imaging ◽  
Frame Rate ◽  
High Definition ◽  
High Frame Rate ◽  
Bright Spots ◽  
Pulsed Neutron

scholarly journals Light Yield Response of Neutron Scintillation Screens to Sudden Flux Changes

2020 ◽  
Vol 6 (12) ◽  
pp. 134
Author(s):  
Tobias Neuwirth ◽  
Bernhard Walfort ◽  
Simon Sebold ◽  
Michael Schulz
Keyword(s):  
Neutron Flux ◽  
Light Yield ◽  
Neutron Imaging ◽  
Frame Rate ◽  
Yield Response ◽  
High Frame Rate ◽  
Long Term Stability ◽  
High Light Yield ◽  
Different Temperatures

We performed a study of the initial and long term light yield of different scintillation screen mixtures for neutron imaging during constant neutron irradiation. We evaluated the light yield during different neutron flux levels as well as at different temperatures. As high frame rate imaging is a topic of interest in the neutron imaging community, the decay characteristics of scintillation screens are of interest as well. Hence, we also present and discuss the decay behavior of the different scintillation screen mixtures on a time scale of seconds. We have found that the decay time of ZnS:Cu/6LiF excited with a high neutron flux is potentially much longer than typically stated. While most of the tested scintillation screens do not provide a significant improvement over currently used scintillation screen materials, Zn(Cd)S:Ag/6LiF seems to be a good candidate for high frame rate imaging due to its high light yield, long-term stability as well as fast decay compared to the other evaluated scintillation screens.

Pulsed-neutron imaging by a high-speed camera and center-of-gravity processing

2018 ◽  
Vol 13 (01) ◽  
pp. C01038-C01038 ◽  
Author(s):  
K. Mochiki ◽  
T. Uragaki ◽  
J. Koide ◽  
Y. Kushima ◽  
J. Kawarabayashi ◽  
...  
Keyword(s):  
High Speed ◽  
Center Of Gravity ◽  
Neutron Imaging ◽  
High Speed Camera ◽  
Pulsed Neutron

scholarly journals Scanning MEMS Mirror for High Definition and High Frame Rate Lissajous Patterns

Micromachines ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 67 ◽  
Author(s):  
Yeong-Hyeon Seo ◽  
Kyungmin Hwang ◽  
Hyunwoo Kim ◽  
Ki-Hun Jeong
Keyword(s):  
Laser Scanning ◽  
Mechanical Stability ◽  
Micro Electro Mechanical System ◽  
Frame Rate ◽  
High Definition ◽  
High Frame Rate ◽  
Frequency Selection ◽  
Electrostatic Mems ◽  
Scanning Imaging ◽  
Potential Use

Scanning MEMS (micro-electro-mechanical system) mirrors are attractive given their potential use in a diverse array of laser scanning display and imaging applications. Here we report on an electrostatic MEMS mirror for high definition and high frame rate (HDHF) Lissajous scanning. The MEMS mirror comprised a low Q-factor inner mirror and frame mirror, which provided two-dimensional scanning at two similar resonant scanning frequencies with high mechanical stability. The low Q inner mirror enabled a broad frequency selection range. The high definition and high frame rate (HDHF) Lissajous scanning of the MEMS mirror was achieved by selecting a set of scanning frequencies near its resonance with a high greatest common divisor (GCD) and a high total lobe number. The MEMS mirror had resonant scanning frequencies at 5402 Hz and 6702 Hz in x and y directions, respectively. The selected pseudo-resonant frequencies of 5450 Hz and 6700 Hz for HDHF scanning provided 50 frames per second with 94% fill factor in 256 × 256 pixels. This Lissajous MEMS mirror could be utilized for assorted HDHF laser scanning imaging and display applications.

scholarly journals Realism in Film: Less is More

Dialogue ◽  
2017 ◽  
Vol 56 (1) ◽  
pp. 131-141 ◽  
Author(s):  
JIRI BENOVSKY
Keyword(s):  
Negative Impact ◽  
Frame Rate ◽  
Test Case ◽  
High Definition ◽  
High Frame Rate ◽  
Less Is More

What is realism in film? Focusing on a test case of High Frame Rate (HFR) high-definition movies, I discuss in this article various types of realism as well as their inter-relations. Precision, recessiveness of the medium, transparency, and ‘Collapse’ are discussed and compared. At the end of the day, I defend the claim that ‘less is more’ in the sense that more image precision can actually have a negative impact on storytelling.

scholarly journals High Frame Rate Super Resolution Imaging Based on Ultrasound Synthetic Aperture Scheme

2015 ◽  
Vol 70 ◽  
pp. 1216-1220 ◽  
Author(s):  
Takayuki Wada ◽  
Yihsin Ho ◽  
Kan Okubo ◽  
Norio Tagawa ◽  
Yoshiyasu Hirose
Keyword(s):  
Super Resolution ◽  
Frame Rate ◽  
Synthetic Aperture ◽  
High Frame Rate ◽  
Resolution Imaging
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